JP5313078B2 - Flush toilet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water closet which causes little variation in the amount of supply of flushing water, and which can properly flush a toilet bowl while saving water. <P>SOLUTION: This water closet includes: a toilet bowl body 10 which has a toilet bowl portion 11; a toilet bowl flushing device 20 which supplies the flushing water to the toilet bowl body 10 by water supply pressure of a water supply source; a control device 30 which controls the toilet bowl flushing device 20; and a water level sensor 40 capable of detecting that the water level of the toilet bowl portion 11 reaches a predetermined water level. The control device 30 has a timer T which can measure a water increasing time T1 until the water level sensor 40 detects that the water level of the toilet bowl portion 11 reaches the predetermined water level, after the toilet bowl flushing device 20 starts the supply of the flushing water to the toilet bowl body 10. A flow rate value X1 of the flushing water is computed from the water increasing time T1, and the amount V1 of the supply of the flushing water until the water level reaches the predetermined water level after the start of the prerequired supply of the flushing wall to the toilet body portion 11; and the supply of the flushing water to the toilet bowl body 10 from the toilet bowl flushing device 20 is controlled on the basis of the flow rate value X1. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a flush toilet bowl.

  Patent Document 1 discloses a conventional flush toilet. This flush toilet includes a toilet body, a toilet cleaning device that supplies cleaning water to the toilet body, and a control device that controls the toilet cleaning device. The toilet body has a toilet bowl and a toilet drainage channel communicating with the downstream side of the toilet bowl. The toilet bowl cleaning apparatus includes a first water supply unit having a large flow rate per unit time (hereinafter referred to as a flow rate) and a second water supply unit having a smaller flow rate of the wash water than the first water supply unit. Yes. Moreover, the toilet bowl cleaning device includes a pressure sensor that detects the water level of the toilet bowl.

  In this flush toilet, when flushing at the end of toilet flushing, the flush water is initially supplied from the first water supply means, which has a large flow rate of flushing water, to the toilet bowl, and then the water level in the toilet bowl is measured by a pressure sensor. However, the wash water is supplied to the toilet bowl by the second water supply means having a small flow rate of the wash water. For this reason, the water level of the toilet bowl can be accurately set to a predetermined water level.

  Further, Patent Document 2 discloses another conventional flush toilet. This flush toilet includes a toilet body, a toilet cleaning device that supplies cleaning water to the toilet body, and a control device that controls the toilet cleaning device. The toilet body has a toilet bowl and a toilet drainage channel communicating with the downstream side of the toilet bowl. The toilet bowl cleaning device has a flow rate detecting means and an on-off valve. Further, the toilet bowl cleaning device is connected to a water supply pipe that communicates with a water supply source drawn out to a toilet room in which the toilet body is installed, and can supply cleaning water to the toilet body by the supply water pressure of the water supply source.

  In this flush toilet, the flow rate of the washing water is directly detected by the flow rate detection means to control the closing timing of the on-off valve. For this reason, even when supply water pressure differs, the wash water supplied to the toilet bowl main body can be made into the desired supply amount.

JP 2007-138432 A JP 2002-294791 A

  However, in the flush toilet of Patent Document 1, after the pressure sensor detects that the water level of the toilet bowl has reached a predetermined water level, the control device stops supplying the flush water of the toilet bowl cleaning device. That is, there is a time difference between when the toilet bowl water level reaches a predetermined water level and when the supply of flush water to the toilet bowl cleaning device is stopped. For this reason, when there is much flow volume of the wash water supplied to a toilet bowl main body, there exists a possibility that the supply amount of the wash water supplied to a toilet bowl main body may become larger than the desired supply amount. That is, when the flow rate of the washing water supplied to the toilet bowl body changes, the supply amount of the washing water supplied to the toilet bowl body may vary. As described above, in the flush toilet of Patent Document 1, the supply amount of the wash water supplied to the toilet body may vary due to a change in the flow rate of the wash water supplied to the toilet body. For this reason, there is a possibility that desired water saving cannot be achieved.

  On the other hand, in the flush toilet of Patent Document 2, the flow rate of the washing water can be directly detected by the flow rate detection means. However, since the closing of the on-off valve is controlled based on the instantaneous flow rate, When the water pressure changes and the flow rate of washing water changes during toilet flushing, there is a risk that the amount of flush water supplied to the toilet bowl will vary. For this reason, there exists a possibility that water saving cannot be aimed at or toilet bowl washing | cleaning cannot be performed favorably.

  The present invention has been made in view of the above-described conventional circumstances, and provides a flush toilet that can perform toilet flushing satisfactorily while reducing the amount of washing water supplied and saving water. This is a problem to be solved.

The flush toilet of the present invention is connected to a toilet body having a toilet bowl drainage channel communicating with the toilet bowl and the downstream side of the toilet bowl, and a water supply pipe communicating with a water supply source drawn out to a toilet room where the toilet bowl is installed A flush toilet comprising a toilet cleaning device that supplies flush water to the toilet body by a supply water pressure of a water supply source, and a control device that controls the toilet cleaning device,
A water level sensor capable of detecting that the water level of the toilet bowl has reached a predetermined water level, and the control device determines whether the toilet bowl has a water level after the toilet cleaning device starts supplying cleaning water to the toilet body. It has a timer that can measure the water increase time until the water level sensor detects that the water level has reached the specified water level. The flow rate value per unit time of the wash water supplied to the toilet body by the toilet cleaning device is calculated from the supply amount of the wash water until the water level is reached, and the flow rate value per unit time is calculated based on this flow value. It is characterized by controlling the supply of washing water.

  In this flush toilet, the water increase time from the start of the supply of the wash water to the toilet bowl until the water level of the toilet bowl reaches the predetermined water level is measured by a timer, and the water increase time and the previously supplied time The flow rate value of the wash water supplied to the toilet body is obtained from the obtained wash water supply amount. For this reason, since the flow rate value becomes an average value during the water increase time, even if a change in the flow rate occurs during that time due to a change in the water supply pressure of the wash water supply source, the influence can be reduced. it can. Therefore, in order to control the supply of wash water to the toilet body of the toilet bowl cleaning device based on the flow rate value, the wash water supplied to the toilet body is close to the set wash water supply amount and has little variation. be able to.

  Therefore, the flush toilet of the present invention has little variation in the amount of wash water supplied, and can perform toilet flushing well while saving water.

The toilet body has a rim water passage provided at the upper peripheral edge of the toilet bowl, and a jet outlet for jetting wash water in the downstream direction of the toilet drainage passage,
The toilet bowl cleaning device can execute rim cleaning for supplying cleaning water to a rim water passage and jet cleaning for supplying cleaning water to a jet outlet.
The controller performs toilet cleaning in the order of rim cleaning and jet cleaning, and calculates the flow rate value with the water level above the water-covering water level as the predetermined water level when performing the rim cleaning. Jet cleaning may be controlled based on the value.

  In this case, in order to control the jet cleaning based on the flow rate value calculated at the time of the rim cleaning performed immediately before the jet cleaning, the supply in which the supply amount of the cleaning water actually supplied at the time of the jet cleaning is set. It can be close to the amount, and can be reduced in variation.

The toilet body has a rim water passage provided at the upper peripheral edge of the toilet bowl, and a jet outlet for jetting wash water in the downstream direction of the toilet drainage passage,
The toilet bowl cleaning device can execute rim cleaning for supplying cleaning water to a rim water passage and jet cleaning for supplying cleaning water to a jet outlet.
The control device executes toilet cleaning in the order of rim cleaning, jet cleaning, and rim cleaning to end toilet cleaning, and calculates the flow rate value with the water level as the predetermined water level when performing the second rim cleaning. And supply of the wash water of the next toilet bowl washing | cleaning can be controlled based on this flow volume value.

  In this case, toilet cleaning is performed in the order of rim cleaning, jet cleaning, and rim cleaning, and filth and the like are discharged from the toilet bowl to the downstream side of the toilet drainage channel during jet cleaning. For this reason, at the time of the second rim cleaning for calculating the flow rate value, there is no dirt or the like floating in the toilet bowl, and the water level can be detected accurately. Therefore, the calculated flow rate value can be a value close to the flow rate of the actually supplied cleaning water. Since the rim cleaning and jet cleaning of the next toilet bowl cleaning are controlled using this flow rate value, the cleaning water actually supplied to the toilet bowl can be brought close to the set supply amount.

The toilet body has a rim water passage provided at the upper peripheral edge of the toilet bowl,
The toilet bowl cleaning device can execute rim cleaning for supplying cleaning water to a rim water passage,
The control device may calculate the flow value with the rising water level above the water-covering water level as the predetermined water level when performing the rim cleaning, and control the rim cleaning based on the flow value.

  In this case, it is possible to identify the timing at which the rim cleaning ends based on the calculated flow rate value, and to end the toilet cleaning. For this reason, the wash water actually supplied to the toilet body by rim cleaning can be brought close to the set supply amount.

  A suction device that sucks air in the toilet drainage channel is provided, and the control device can perform suction control of the suction device based on the flow rate value. In this case, the suction device sucks air in the toilet drainage channel to generate a siphon action in the toilet drainage channel, and the suction device discharges air into the toilet drainage channel to cause the siphon action in the toilet drainage channel. finish. For this reason, by controlling the suction device according to the magnitude of the flow rate value, the siphon action can be generated well in the toilet drainage channel, and the toilet bowl can be washed well.

1 is a sectional view illustrating a flush toilet of Example 1. FIG. In the toilet bowl washing | cleaning of Example 1, (A) is the water level of a toilet bowl part, (B) is a rim washing | cleaning, (C) is a graph showing jet washing. 3 is a flowchart showing a toilet cleaning process of the first embodiment. It is sectional drawing showing the flush toilet bowl of Example 2. FIG. 6 is a cross-sectional view illustrating a flush toilet of Example 3. FIG. In toilet bowl washing of Example 3, (A) is a water level of a toilet bowl part, (B) is a rim washing, and (C) is a graph showing the amount of suction of a suction tank. It is a flowchart which shows the toilet cleaning process of Example 3.

  Embodiments 1 to 3 embodying the flush toilet of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the flush toilet of Example 1 includes a toilet main body 10, a toilet cleaning device 20 that supplies cleaning water to the toilet main body 10, and a control device 30 that controls the toilet cleaning device 20. Yes. The toilet body 10 includes a toilet bowl 11 and a toilet drainage channel 12 communicating with the downstream side of the toilet bowl 11.

  A rim water passage 13 is provided at the upper peripheral edge of the toilet bowl 11. A rim communication pipe 13 </ b> J communicates with the rim water passage 13. For this reason, so-called rim cleaning can be performed in which cleaning water is supplied from the toilet bowl cleaning device 20 to the rim water passage 13 via the rim communication pipe 13J. In the rim cleaning, the cleaning water supplied to the rim water passage 13 flows in one direction, gradually flows down along the surface of the toilet bowl 11, and a swirling flow is formed in the toilet bowl 11.

  In addition, a jet nozzle 15 having a jet outlet 16 is attached to a through-hole 14 provided in the lower end of the upstream of the toilet drainage channel 12. A jet communication pipe 15J is connected to the jet nozzle 15. For this reason, so-called jet cleaning in which cleaning water is supplied from the toilet bowl cleaning device 20 to the jet outlet 16 via the jet communication pipe 15J can be performed. In the jet cleaning, cleaning water is jetted from the jet outlet 16 in the downstream direction of the toilet drainage channel 12.

  The downstream end of the toilet drainage channel 12 is inserted and connected to the upper opening of the drainage connection pipe 17 fixed to the floor surface F on which the toilet body 10 is installed. A lower opening of the drainage connection pipe 17 is connected to a drainage pipe D drawn out to the floor surface F.

  The toilet bowl cleaning device 20 is connected to a water supply pipe 21 that communicates with a water supply source S drawn out to a toilet room R in which the toilet bowl body 10 is installed. The toilet bowl cleaning device 20 includes a rim discharge pipe 23A connected to the upstream end of the rim communication pipe 13J and a jet discharge pipe 23B connected to the upstream end of the jet communication pipe 15J. Further, the toilet bowl cleaning device 20 includes open / close valves 22A and 22B provided in the rim discharge pipe 23A and the jet discharge pipe 23B, respectively. Therefore, the rim cleaning can be executed by opening the on-off valve 22A, and the jet cleaning can be executed by opening the on-off valve 22B.

  The flush toilet of Example 1 includes a water level sensor 40 above the rear part of the toilet bowl 11. The water level sensor 40 is an optical sensor, and can detect that the water level of the toilet bowl 11 has reached a predetermined water level.

  The control device 30 can control opening and closing of the on-off valves 22A and 22B of the toilet bowl cleaning device 20. In the flush toilet of Example 1, when a toilet cleaning button provided on a remote controller (not shown) is operated and toilet cleaning is started, rim cleaning, jet cleaning, and rim cleaning are executed in this order as shown in FIG. Thus, the control device 30 controls the opening and closing of the on-off valves 22A and 22B. In this toilet bowl cleaning, the water level of the toilet bowl 11 rises to the rising water level L2 by the first rim cleaning. Next, the cleaning water ejected from the jet outlet 16 discharges the filth in the toilet bowl 11 to the downstream of the toilet drainage channel 12, and the water level of the toilet bowl 11 is set to the level of the toilet drainage channel 12. It descends to the vicinity of the upstream end opening. The water level of the toilet bowl 11 rises to the water-covering water level L1 by the second rim cleaning performed next, and a water seal is formed.

  Moreover, the control apparatus 30 can control the drive of the water level sensor 40, a setting, and the process of a detection signal, as shown in FIG. In the flush toilet of the first embodiment, the control device 30 sets the predetermined water level to the rising water level L2 at which the water level of the toilet bowl 11 has risen the most by the first rim cleaning. For this reason, the water level sensor 40 can detect that the water level of the toilet bowl 11 has reached the rising water level L2.

  Further, the control device 30 confirms that the water level of the toilet bowl 11 has reached the rising water level L2 after the on-off valve 22A provided in the rim discharge pipe 23A of the toilet bowl cleaning device 20 is opened and the rim cleaning is started. It has a timer T that can measure the water increase time T1 until the water level sensor 40 detects it.

  Further, the control device 30 supplies the amount of cleaning water required until the water level of the toilet bowl 11 reaches the rising water level L2 from the water level L1 of the toilet bowl 11 before the rim cleaning required in advance is started. It has the memory | storage part M in which V1 is memorize | stored.

  Thereby, the control apparatus 30 is the flow rate of the wash water supplied to the toilet bowl part 11 in the 1st rim washing | cleaning by the water increase time T1 measured with the timer T, and the supply amount V1 memorize | stored in the memory | storage part M. The value X1 is calculated. For this reason, the calculated flow rate value X1 is an average value during the water increase time T1. Therefore, even if the flow rate changes during that time due to a change in the water supply pressure of the water supply source of the cleaning water, the influence can be reduced.

  On the other hand, the supply amount V2 of the cleaning water supplied to the toilet body 10 in the jet cleaning in the toilet bowl cleaning, and the cleaning required from the lowest water level in the jet cleaning of the toilet bowl 11 to reach the water level L1 in the second rim cleaning. The water supply amount V3 is set in advance, and each is stored in the storage unit M. Therefore, the jet cleaning time T2 and the second rim cleaning time T3 can be calculated from the flow rate value X1 and the supply amounts V2 and V3. Since the jet cleaning time T2 and the second rim cleaning time T3 are calculated based on the flow rate value X1 that is less affected by the change in the flow rate, the cleaning water actually supplied in the jet cleaning and the second rim cleaning is supplied. The amount can be made close to the set supply amounts V2 and V3 and with little variation.

  Therefore, the flush toilet of Example 1 has little variation in the amount of wash water supplied and can perform toilet flushing well while saving water.

  The calculated jet cleaning time T2 and the second rim cleaning time T3 are stored in the storage unit M. The jet cleaning and the second rim cleaning are executed according to the stored jet cleaning time T2 and the second rim cleaning time T3.

  Next, the toilet cleaning process of the flush toilet of Example 1 configured as described above will be described with reference to FIG.

  When a toilet bowl cleaning button provided on a remote controller (not shown) is operated and toilet bowl cleaning is started, the on-off valve 22A of the toilet bowl cleaning apparatus 20 is opened, and the first rim cleaning is started (step S1). Thereby, the water level of the toilet bowl part 11 rises. The first rim cleaning is started and the timer T starts measuring time (step S2). When the water level sensor 40 detects that the water level of the toilet bowl 11 has reached the rising water level L2, the timer T measures the water increase time T1, the on-off valve 22A is closed, and the first rim cleaning is completed (step) S3, S4).

  On the other hand, as described above, the flow rate value X1 is calculated based on the water increase time T1 measured by the timer T, and the jet cleaning time T2 and the second rim cleaning time T3 are calculated based on the flow rate value X1 (step S12). ).

  After the first rim cleaning is completed, the timer T is reset (step S5), and jet cleaning is started (step S6). The jet cleaning is executed for the calculated T2 time (step S7). During jet cleaning, filth and the like in the toilet bowl 11 are discharged downstream of the toilet drainage channel 12, and the water level of the toilet bowl 11 is lowered. When the jet cleaning is finished (step S8), the second rim cleaning is started (step S9). The second rim cleaning is executed for the calculated T3 time (step S10). By the second rim cleaning, the water level of the toilet bowl 11 rises to the water-covering water level L1, a water seal is formed, the second rim cleaning ends (step S11), and the toilet bowl cleaning ends.

  In the toilet bowl cleaning performed in this way, when the flow rate changes due to a change in the water supply pressure of the water supply source of the wash water, as shown in FIGS. The water level, the rim cleaning flow rate and time, and the jet cleaning flow rate and time vary. That is, in FIG. 2, the case where the flow rate is large and the water increase time T1 is short is indicated by a dotted line, the case where the flow rate is low and the water increase time T1 is long is indicated by a two-dot chain line, and the middle case is indicated by a solid line. Yes. The supply amount of rim cleaning and jet cleaning can be expressed by the area of each trapezoid shown in the graphs of FIGS. 2B and 2C, but the area of each trapezoid is substantially equal even if the water increase time T1 changes. That is, in the flush toilet of Example 1, the amount of flush water supplied to the toilet body is small even when the flow rate is changed, and toilet flushing can be performed satisfactorily while saving water.

  As shown in FIG. 4, the flush toilet bowl of Example 2 can detect that the water level sensor 41 provided above the rear part of the toilet bowl 11 has reached the water-covered water level L1. The timer T is a water level sensor that indicates that the water level of the toilet bowl 11 has reached the water-covered water level L1 after the on-off valve 22A is opened and the rim cleaning is started during the second rim cleaning in the toilet bowl cleaning. The water increase time T4 until 41 detects is measured. Further, in the storage unit M of the control device 31, the water level of the toilet bowl 11 reaches the water-covered water level L1 from the lower precipitation level L3 of the toilet bowl 11 before the second rim cleaning that has been obtained in advance is started. The supply amount V4 of the cleaning water required until this time is stored.

  Thereby, the control apparatus 31 is the flow rate of the wash water supplied to the toilet bowl part 11 in the 2nd rim washing | cleaning by the water increase time T4 measured by the timer T, and the supply amount V4 memorize | stored in the memory | storage part M. The value X2 is calculated. For this reason, the calculated flow rate value X2 becomes an average value during the water increase time T4. Therefore, even if the flow rate changes during that time due to a change in the water supply pressure of the water supply source of the cleaning water, the influence can be reduced.

  On the other hand, in the first rim cleaning in the toilet bowl cleaning, the flush water supply amount V5 required for the water level of the toilet bowl 11 to reach the rising water level of a predetermined height from the covering water level L1, and the toilet body 10 in the jet cleaning The supply amount V6 of the cleaning water to be supplied is set in advance, and each is stored in the storage unit M. Therefore, the first rim cleaning time T5 and jet cleaning time T6 can be calculated from the flow rate value X2 and the supply amounts V5 and V6. Thereby, the first rim cleaning and jet cleaning in the next toilet bowl cleaning are executed. As described above, since the first rim cleaning time T5 and the jet cleaning time T6 are calculated based on the flow rate value X2 that is less affected by the change in the flow rate, the rim cleaning and jet cleaning are actually supplied in the first time. The supply amount of the washing water is close to the set supply amounts V5 and V6, and can be reduced. About another structure, it is the same as that of Example 1, About the same structure, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  Therefore, the flush toilet of Example 2 has little variation in the amount of wash water supplied and can perform toilet flushing well while saving water.

  As shown in FIG. 5, the flush toilet according to the third embodiment includes a toilet body 100, a toilet cleaning device 120 that supplies cleaning water to the toilet body 100, and a control device 130 that controls the toilet cleaning device 120. Yes. The toilet drainage channel 112 includes an upstream toilet drainage channel 112A formed integrally with the toilet bowl 11, and a downstream toilet drainage channel 112B connected to the downstream end opening of the upstream toilet drainage channel 112A. The downstream drainage channel 112 </ b> B communicates with the drainage pipe D drawn out to the floor surface F via the drainage connection pipe 117. Further, the flush toilet of Example 3 includes a suction device 50 that sucks air in the toilet drainage channel 112. Other configurations are the same as those of the first embodiment, and the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  The suction device 50 includes a suction tank 51 and a driving device 52. The inside of the suction tank 51 is partitioned into two upper and lower chambers by a diaphragm that is movable in the vertical direction (not shown). A cylindrical suction port 51 </ b> A extending downward is provided on the lower surface of the suction tank 51. The suction port 51A is connected to a connection port 112C formed on the rear upper surface of the downstream toilet drainage channel 112B. The upper surface of the suction tank 51 is connected to a connection pipe 51 </ b> J having an opening penetrating and connected to the driving device 52.

  The drive device 52 has a built-in motor E, and when the motor E is driven, air is sucked into and discharged from the upper chamber above the diaphragm in the suction tank 51 through the connecting pipe 51J. be able to. When the driving device 52 sucks air in the upper chamber in the suction tank 51, the diaphragm in the suction tank 51 moves upward. Thereby, the lower chamber below the diaphragm in the suction tank 51 sucks the air in the toilet drainage channel 112. Further, when the driving device 52 discharges air to the upper chamber in the suction tank 51, the diaphragm in the suction tank 51 moves downward. Thereby, the air sucked into the lower chamber in the suction tank 51 is discharged into the toilet drainage channel 112.

  The downstream end of the downstream toilet drainage channel 112B is inserted into and connected to the upper opening of the drainage connection pipe 117 fixed to the floor surface F on which the toilet body 100 is installed. The drainage connection pipe 117 is curved in a spiral shape, and a staying portion in which the washing water stays is formed. A lower opening of the drainage connection pipe 17 is connected to a drainage pipe D drawn out to the floor surface F.

  The toilet bowl cleaning device 120 is connected to the upstream end of the rim communication pipe 13J and includes an on-off valve 22A2. Rim cleaning can be performed by opening the on-off valve 22A.

  The control device 130 can control the suction device 50. That is, the control device 130 can control the driving device 52 to perform suction of air in the toilet drainage channel 112 of the suction tank 51 and discharge of air in the suction tank 51 into the toilet drainage channel 112.

  In the flush toilet of Example 3, when a toilet cleaning button provided in a remote controller (not shown) is operated and toilet cleaning is started, rim cleaning is executed as shown in FIG. During execution of rim cleaning, the suction tank 51 of the suction device 50 performs suction and discharge of air in the toilet drainage channel 112. Thus, the control device 130 controls the on-off valve 22A and the suction device 50 so as to open and close the on-off valve 22A and drive the driving device 52 of the suction device 50. In this toilet bowl cleaning, the rim cleaning is started and the water level of the toilet bowl 11 rises to the rising water level L2 until the suction tank 51 sucks the air in the toilet drainage channel 112. When the suction tank 51 sucks air in the toilet drainage channel 112, a siphon action is generated in the toilet drainage channel 112. Due to the siphon action generated in the toilet drainage channel 112, filth in the toilet bowl 11 is discharged downstream of the toilet drainage channel 112, and the water level of the toilet bowl 11 reaches the vicinity of the upstream end opening of the upstream toilet drainage channel 112A. Descend. Next, when the air in the suction tank 51 is discharged into the toilet drainage channel 112, the siphon action is finished. Thereby, the water level of the toilet bowl part 11 rises to the covering water level L1, a water seal is formed, and rim washing | cleaning is complete | finished.

  In the control device 130, the supply amount V8 of cleaning water used for toilet cleaning (rim cleaning) is preset and stored in the storage unit M. Further, the control device 130 calculates the flow rate value X1 from the water increase time T1 measured by the timer T and the supply amount V1. Therefore, the rim cleaning time T8 can be calculated from the flow rate value X1 and the supply amount V8. Since the rim cleaning time T8 is calculated based on the flow rate value X1 that is less affected by the change in the flow rate, the supply amount of cleaning water actually supplied by the rim cleaning is close to the set supply amount V8 and has little variation. Can be a thing.

  Therefore, the flush toilet of Example 3 also has little variation in the amount of wash water supplied and can perform toilet flushing well while saving water.

  Further, there is a correlation between the flow rate value X1 and the suction time T7 from when the suction tank 51 starts sucking the air in the toilet drainage channel 112 until the air in the suction tank 51 is discharged into the toilet drainage channel 112. . That is, when the flow rate value X1 decreases, the suction time T7 is shortened. This prevents the sound of tearing from being generated due to almost all of the wash water in the toilet bowl 11 being discharged. Therefore, when the flow rate value X1 is small, the suction time T7 is shortened, Before the washing water in the portion 11 runs out, the air in the suction tank 51 is discharged into the toilet drainage channel 112 to terminate the siphon action. The storage unit M of the control device 130 stores a chart indicating the correlation between the flow rate value X1 and the suction time T7, and the suction time T7 is determined according to the flow rate value X1.

  Next, a toilet cleaning process of the flush toilet of Example 3 configured as described above will be described with reference to FIG.

  When a toilet flushing button provided in a remote controller (not shown) is operated and toilet flushing is started, the on-off valve 22A of the toilet flushing device 120 is opened, and rim washing is started (step S31). Thereby, the water level of the toilet bowl part 11 rises. The rim cleaning is started and the timer T starts measuring time (step S32). When the water level sensor 40 detects that the water level of the toilet bowl 11 has reached the rising water level L2, the timer T measures the water increase time T1.

  On the other hand, as described above, the flow rate value X1 is calculated based on the water increase time T1 measured by the timer T, and the suction time T7 and the rim cleaning time T8 are calculated based on the flow rate value X1 (step S40).

  After the water level sensor 40 detects that the water level of the toilet bowl 11 has reached the rising water level L2, the timer T is reset (step S34), and the air in the toilet drainage channel 112 is sucked by the suction tank 51 of the suction device 50. Is started (step S35). Thereby, a siphon action is generated in the toilet drainage channel 112. The siphon action continues while the suction state continues (step S36), that is, for the calculated suction time T7. In the meantime, the filth etc. in the valve bowl part 11 are discharged | emitted downstream of the toilet drainage channel 112, and the water level of the toilet bowl part 11 falls. When the suction time T7 has elapsed, the air in the suction tank 51 is discharged into the toilet drainage channel 112 (step S37). Thereby, the siphon action in the toilet drainage channel 112 is terminated, and the water level of the toilet bowl 11 rises. Until the rim cleaning time T8 elapses (step S38), the rim cleaning is continued, the water level of the toilet bowl 11 rises to the water-covering water level L1, and a water seal is formed. When the rim cleaning time T8 elapses, the rim cleaning ends (step S39), and the toilet bowl cleaning ends.

In the toilet bowl cleaning performed in this way, when the flow rate changes due to a change in the water supply pressure of the water supply source of the washing water, as shown in FIGS. The water level, the rim cleaning flow rate and time, and the suction time of the suction tank vary. That is, in FIG. 6, the case where the flow rate is large and the water increase time T1 is short is indicated by a dotted line, and the case where the flow rate is low and the water increase time T1 is long is indicated by a solid line. The supply amount of rim cleaning can be expressed by the area of each trapezoid shown in the graph of FIG. 6B, but the area of each trapezoid is substantially equal even if the water increase time T1 changes. That is, in the flush toilet of Example 3, the amount of flush water supplied to the toilet body is small even when the flow rate is changed, and toilet flushing can be performed satisfactorily while saving water.

The present invention is not limited to the first to third embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In Example 1, the second rim cleaning time was calculated and the second rim cleaning was completed, but a water level sensor capable of detecting the water-covering water level was provided, and the second rim cleaning was performed by the detection. It may be terminated. Similarly, in the third embodiment, a water level sensor capable of detecting the water-covering water level may be provided, and the rim cleaning may be terminated by the detection.
(2) In Example 3, the suction device that sucks the air in the toilet drainage channel is provided, but a flush toilet that does not include the suction device and performs only rim cleaning may be used.
(3) In Examples 1 to 3, the water level sensor is an optical type, but another type of sensor may be used. For example, the pressure sensor attached to the jet nozzle may measure the water head pressure or may be a float type.
(4) In Examples 1 and 2, toilet cleaning is performed in the order of rim cleaning, jet cleaning, and rim cleaning. However, jet cleaning after rim cleaning may be performed to end toilet cleaning. In that case, the water level in the toilet bowl is returned to the water-covered water level by jet cleaning.
(5) In the first and second embodiments, the rim cleaning, jet cleaning, and rim cleaning are performed without overlapping in the toilet bowl cleaning, but may be performed in an overlapping manner.
(6) In the first to third embodiments, the control device controls the opening / closing of the opening / closing valve. However, the control device controls the flow rate of the washing water supplied to the toilet body by using an opening / closing valve having a flow rate adjusting function. Also good.
(7) In the third embodiment, the control device controls the suction time of the suction device, but may control the suction amount.

DESCRIPTION OF SYMBOLS 10,100 ... Toilet body 11 ... Toilet bowl part 12, 112 ... Toilet drain passage 13 ... Rim water passage 16 ... Jet spout 20, 120 ... Toilet washing device 21 ... Water supply pipe 30, 130 ... Control device 40, 41 ... Water level Sensor 50 ... Suction device R ... Toilet room S ... Water supply source T ... Timer

Claims (5)

It is connected to a toilet bowl body having a toilet bowl drainage channel communicating with the toilet bowl and the downstream side of the toilet bowl section, and a water supply pipe connected to a water supply source drawn out to a toilet room in which the toilet bowl body is installed. A flush toilet comprising a toilet cleaning device that supplies flush water to the toilet body, and a control device that controls the toilet cleaning device,
A water level sensor capable of detecting that the water level of the toilet bowl has reached a predetermined water level, and the control device determines whether the toilet bowl has a water level after the toilet cleaning device starts supplying cleaning water to the toilet body. It has a timer that can measure the water increase time until the water level sensor detects that the water level has reached the specified water level. The flow rate value per unit time of the wash water supplied to the toilet body by the toilet cleaning device is calculated from the supply amount of the wash water until the water level is reached, and the flow rate value per unit time is calculated based on this flow value. A flush toilet characterized by controlling the supply of flush water. The toilet body has a rim water passage provided at the upper peripheral edge of the toilet bowl, and a jet outlet for jetting wash water in the downstream direction of the toilet drainage passage,
The toilet bowl cleaning device can execute rim cleaning for supplying cleaning water to a rim water passage and jet cleaning for supplying cleaning water to a jet outlet.
The controller performs toilet cleaning in the order of rim cleaning and jet cleaning, and calculates the flow rate value with the water level above the water-covering water level as the predetermined water level when performing the rim cleaning. The flush toilet according to claim 1, wherein jet cleaning is controlled based on the value. The toilet body has a rim water passage provided at the upper peripheral edge of the toilet bowl, and a jet outlet for jetting wash water in the downstream direction of the toilet drainage passage,
The toilet bowl cleaning device can execute rim cleaning for supplying cleaning water to a rim water passage and jet cleaning for supplying cleaning water to a jet outlet.
The control device performs toilet cleaning in the order of rim cleaning, jet cleaning, and rim cleaning, and calculates the flow rate value with the water level as the predetermined water level when performing the second rim cleaning. 2. The flush toilet according to claim 1, wherein the supply of flush water for the next toilet flush is controlled based on the flow rate value. The toilet body has a rim water passage provided at the upper peripheral edge of the toilet bowl,
The toilet bowl cleaning device can execute rim cleaning for supplying cleaning water to a rim water passage,
2. The control device according to claim 1, wherein when the rim cleaning is performed, the flow rate value is calculated with the rising water level above the water level as the predetermined water level, and the rim cleaning is controlled based on the flow rate value. 1. A flush toilet according to 1.   The flush toilet according to claim 4, further comprising a suction device for sucking air in the toilet drainage channel, wherein the control device performs suction control of the suction device based on the flow rate value.

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