JP2005282240A - Force-feed flush toilet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a force-feed flush toilet capable of stably maintaining a toilet bowl flushing performance, suppressing noise in draining reserved water, properly maintaining the level of the reserved water, and avoiding that flushing water overflows from a toilet bowl due to a defect such as the clogging of a tube and the failure of a pump by controlling a feeding and discharging water amounts even when a drain water velocity is varied by the drain resistance of a drain pipe or a feed water velocity is varied by a feed water pressure. <P>SOLUTION: This force-feed flush toilet comprises the toilet bowl, a flushing water supply means for supplying the flushing water to the toilet bowl, a toilet bowl water reserving part for holding the flushing water in the toilet bowl, a toilet bowl discharge port for discharging the flushing water, a trap pipe formed of a pipe communicating with the toilet bowl discharge port to maintain the flushing water as a reserve water in the toilet bowl water reserving part, and a water discharge pump disposed in the trap pipe and discharging the reserve oil from the toilet bowl. The flush toilet comprises a sensor detecting the level of the reserve water in the toilet bowl water reserving part and a control part controlling the flushing water supply means and the water discharge pump by output signals from the sensor. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pressure-flush flush toilet without a storage container, and relates to a pressure-flush flush toilet having a function of performing stable and efficient toilet flushing at the time of toilet flushing, detecting an apparatus abnormality and avoiding troubles in advance. It is.

In the conventional flush-type flush toilet without a storage container, when the start of washing is started, the drainage pump and the washing water supply are started and stopped after the set time has elapsed, and the washing process is finished.
However, in the pressure-flushing flush toilet, it is a pipe that freely draws a thin drain pipe with a diameter of about Φ20 mm using the merit of forcibly draining with a drain pump. Therefore, the pipe resistance varies depending on the thickness, length, and height difference of the drainage pipe, and the drainage speed varies. Also, the water supply pressure to the toilet varies depending on the installation location, and the water supply speed varies. Therefore, if the cleaning process is controlled by time as described above, excess or deficiency occurs in the drainage amount or the water supply amount. For example, when the drainage speed is slow, the drainage pump stops before the toilet bowl water is completely drained, and dirty water remains in the bowl. On the other hand, when the drainage speed was high, the drainage pump operated even after the toilet bowl water was discharged, and air was caught in the drainage pump, generating unpleasant noise. Also, at the stage where water is stored in the bowl, the amount of water stored depends on the water supply speed. If the water supply speed is high, the water will overflow from the bowl. Cannot be secured. In addition, when the user started cleaning without being aware of the piping clogging, that is, a pump failure, troubles such as overflow of cleaning water from the toilet occurred.

  The present invention has been made to solve the above problems, and an object of the present invention is to control the amount of water supply / drainage even when there is a variation in drainage speed due to drainage resistance of drainage piping and a variation in water supply rate due to feedwater pressure. Therefore, the toilet flushing performance can be maintained stably, the noise during drainage can be suppressed, the water level can be kept at an appropriate level, and the flushing water can overflow from the toilet due to problems such as clogged piping or pump failure. The object of the present invention is to provide a flush toilet that avoids this problem.

In order to achieve the above object, according to the invention described in claim 1,
Toilet bowl,
Cleaning water supply means for supplying cleaning water to the toilet;
Toilet reservoir for holding flush water in toilet bowl, toilet outlet for discharging flush water in toilet bowl reservoir and toilet outlet for holding flush water in toilet bowl reservoir A trap pipe formed by a pipe communicated with
A drainage pump for draining the accumulated water from the toilet,
In the pressure-flushing flush toilet composed of
A pressure-flush flush toilet comprising a sensor for detecting the water level in the toilet water reservoir and a control unit for controlling the flush water supply means and the drain pump by an output signal of the sensor.
Thereby, it is possible to control the water supply amount, drainage amount, water supply time, and drainage time based on the water level information in the toilet bowl. Therefore, efficient operation of water supply and drainage is realized without depending on the water supply pressure or drainage pipe resistance, and the operation of water supply and drainage is controlled so that the wash water does not overflow from the bowl when there is an abnormality in the pressure water flush toilet. be able to.

According to the second aspect of the present invention, in order to maintain the optimum water level of the toilet bowl, the control unit is set with a first predetermined water level that is the optimum water level of the toilet, and the control unit includes the sensor. If the water level is higher than the first predetermined water level, the drainage pump is driven to discharge the stored water, and if the water level is low, the flush water supply means is driven to supply water. Then, the toilet is controlled so as to have an optimal water level.
This makes it possible to detect a decrease in the stored water level due to evaporation of the stored water or fluctuations in sewer pressure, and an increase in the stored water level due to drainage to the toilet, etc. Since drainage can be performed, it is possible to reliably maintain the sealed water by the stored water when the toilet is not used, and to maintain the stored water at an optimal water level when the toilet is used.

According to the third aspect of the present invention, the activation signal transmission unit that transmits a toilet cleaning signal to the control unit is provided, and the control unit recognizes the drainage state of the stored water in the toilet reservoir. When the predetermined water level is set, and the control unit receives a signal from the activation signal transmitting unit, the water stored in the toilet water storage unit is drained to the second predetermined water level or less, and the water level in the toilet water storage unit 2, the operation of the washing water supply means and the drainage pump is controlled so that the first predetermined water level is reached again when it is detected that the water level is lower than the second predetermined water level. It is set as the pressure-feed flush toilet of 2 description.
Thereby, in the toilet bowl washing process, the stored water in the toilet bowl is discharged to a level equal to or lower than the second predetermined water level, so that the sewage in the toilet bowl is reliably discharged from the toilet bowl, and the washing water can be supplied without excess or deficiency. Further, after the second predetermined water level is detected, the stored water is returned by the supply means, so that the drainage pump does not involve air and does not rotate idly, and unpleasant noise due to the air entrainment of the drainage pump can be suppressed.

According to the invention described in claim 4, until the sensor detects the second predetermined water level or less, the control unit controls the cleaning water supply means and the drainage pump so that the drainage rate exceeds the water supply rate. The operation is controlled, and the pressure-flush flush toilet according to claim 3 is provided.
As a result, water is drained to the second predetermined water level without stopping the water supply by the water supply means, so that the waste in the toilet can be reliably sent to the drain pump while stirring, and the waste water can be drained while diluting the waste water. Therefore, the sewage remaining in the trap pipe at the time of discharge from the toilet is replaced with the washing water, and the water exchange rate of the stored water is improved, resulting in a marked improvement in washing performance. If the water supply speed and the drainage speed can be controlled, stable cleaning can be performed by suppressing variations in the drainage resistance of the drainage pipes, the amount of cleaning water and the cleaning time due to variations in the water supply.

According to the invention of claim 5, when the sensor detects the second predetermined water level or less, the control unit operates the washing water supply means and the drainage pump so that the water supply rate exceeds the drainage rate. It controls, It is set as the pressure-feed flush toilet of Claims 3 and 4.
As a result, water is supplied to the first predetermined water level while draining without stopping the drain pump, so that the cleaning performance is improved, and the water exchange rate of the stored water is improved by draining and supplying the water once.

According to the sixth aspect of the present invention, the water stored in the toilet water storage section is drained from the first predetermined water level to the second predetermined water level or less by a single cleaning start signal from the start signal transmitting section. 5. After detecting the second predetermined water level, a series of operations of supplying cleaning water into the toilet water reservoir to the first predetermined water level again is repeated at least once. It is set as the pressure-flush flush toilet of 5.
Thereby, the filth in the toilet bowl can be discharged reliably, and the water exchange rate can be improved. Furthermore, the quality of sewage in the drain pipe can be improved.

According to the invention of claim 7, a third predetermined water level is set further above the first predetermined water level in the control unit, and the control unit detects the third predetermined water level or higher, 7. The pressure-flush flush toilet according to claim 1, wherein only the drainage pump is controlled prior to all control.
As a result, a third predetermined water level that cannot rise even during normal use and cleaning processes is set, and when the sensor detects the third predetermined water level, the controller determines that the apparatus is abnormal, and the cleaning process, Not only when the water level is maintained or when the toilet is not used, but only the drainage pump is preferentially operated, so that it is possible to prevent a trouble that the flush water from the toilet overflows.

According to an eighth aspect of the present invention, there is provided display means capable of receiving a signal from the control unit, and the sensor detects the third predetermined water level or higher, or is below the second predetermined water level or accumulated except in a cleaning step. 8. The pressure-fed water washing according to claim 1, wherein when it is detected that the water supply / drainage process is not completed within a predetermined time, the control unit operates the display means to notify the user of the abnormality. A toilet will be used.
Thereby, abnormality can be notified to a user beforehand and it becomes possible to avoid the accident and trouble by toilet use in an abnormal state.

  According to the present invention, it is possible to achieve efficient and reliable cleaning in toilet cleaning without depending on variations in drainage speed due to drainage piping conditions of a pressure-feed type flush toilet and water supply speed due to supply water pressure, Noise during drainage by the pump can be reduced. Moreover, an appropriate stored water level can be secured by monitoring the stored water level. In addition, it is possible to detect a device abnormality and avoid problems such as flush water overflow from the toilet.

  FIG. 1 shows a block diagram of a pressure-flush flush toilet of the present invention, and an embodiment will be described below based on this block diagram. The clean water is discharged into the toilet 1 as cleaning water through the cleaning water supply means constituted by the water discharging valve 5 and the flow rate adjusting valve 4. As shown in FIG. 8, the toilet 1 is formed with a toilet reservoir 8 for storing flush water as a reservoir, and a pressure sensor 6 that detects the water level of the reservoir as pressure on the bottom inner wall surface of the toilet reservoir 8 as shown in FIG. 8. Buried. FIG. 8 shows a cross section of the installation part in which the pressure sensor 6 is installed on the inner wall surface of the bottom of the toilet water reservoir 8. According to FIG. 8, the pressure sensor 6 is sandwiched from the front and the back of the toilet water reservoir 8 via a sealing member 14 in a through hole formed in the toilet water reservoir 8, and the protruding portion toward the inner surface side of the toilet water reservoir 8 Is fixed to be small. Therefore, it is possible to reliably detect the water level of the stored water without disturbing the toilet at the time of use or cleaning. Further, the pressure sensor 6 is connected to the control unit 7 by a signal line 15, and the water level signal of the pressure sensor 6 can be sent to the control unit 7.

  Returning to FIG. 1, a toilet outlet 1a for discharging the stored water is formed at the bottom of the toilet reservoir 8 and a trap pipe 12 having a rising portion 12a communicates with the downstream of the outlet 1a. By the rising portion 12 a of the trap pipe 12, the stored water as sealed water can be held in the stored water portion 8. A drainage pump 2 capable of controlling the water discharge capacity is disposed below the trap pipe 12. A siphon breaker 11 is arranged above the uppermost portion of the rising portion 12a of the trap pipe 12 so that water in the trap pipe 12 forming the accumulated water by the siphon phenomenon does not flow out through the hollow pipe. The siphon breaker 11 is composed of an air solenoid valve that is airtight when closed, and opens the air solenoid valve for a certain period of time in synchronization with the stoppage of the drainage pump 2 to avoid negative pressure in the trap pipe 12 due to the siphon phenomenon. Holds water stored in water. The control unit 7 includes an operation unit having a pressure sensor 6, a drainage pump 2, a siphon breaker 11, a water discharge valve 5, a flow rate adjustment valve 4, and a start signal transmission unit for transmitting a toilet cleaning start signal. 9 and a display device 10 for notifying a toilet user of a system abnormality are connected, and each component can be controlled.

  In the present embodiment, the drainage pump 2 capable of controlling the water discharge capacity is provided. However, a drainage pump capable of only ON / OFF control as long as the drainage and water supply capacity exceed a certain level may be used. Although the flow rate adjusting valve 4 is provided on the water supply side, the flow rate adjusting valve 4 may not be provided because the purpose can be achieved only by the water discharging valve 5 if the water supply is only stopped and discharged.

Next, the operation of the pressure-fed flush toilet of FIG. 1 will be described using a time chart. 2a and 2b are control time charts for maintaining the stored water level, FIG. 3 for cleaning, and FIGS.
2a and 2b show time charts for the stored water level control. In the control unit 7, an optimal water level is set in advance as the first predetermined water level as the stored water during standby and use of the toilet. During standby and in use, when the water level signal from the pressure sensor 6 rises more than a predetermined width from the first predetermined water level, the drainage pump 2 operates to discharge the accumulated water until it reaches the first predetermined water level. Further, when the water level signal from the pressure sensor 6 drops from the first predetermined water level by a predetermined width or more, the water discharge valve 5 opens and the water is replenished until the first predetermined water level is reached, so that the optimum water level is always maintained. ing.

FIG. 3 shows a time chart during cleaning. The control unit 7 is set with a first predetermined water level that is a stored water level at the time of use and standby, and a second predetermined water level that is a water level at which substantially no water has accumulated from the toilet water storage unit 8. When the user finishes using the toilet and presses the cleaning start button of the operation unit 9 (initiating cleaning in the figure), a signal is sent to the control unit 7, which activates the drain pump 11 and the water discharge valve 5, Start draining. At this time, in order to improve the washability of the toilet, the flow rate adjusting valve 4 is adjusted to supply water so as not to exceed the drainage speed, or the output of the drainage pump 11 is controlled to discharge the accumulated water. Note that if the drainage capacity exceeds the water supply capacity, the drainage pump 11 and the water discharge valve 5 may be turned on. Alternatively, the water discharge valve may be turned off and only the drainage pump 11 may be turned on.
When drainage proceeds and the pressure sensor 6 detects the second predetermined level or lower, the water discharge valve 5 continues to operate, stops only the drainage pump 11, and accumulates water until the first predetermined level is reached again. When the pressure sensor 6 detects the first predetermined water level, the water discharge valve 5 is stopped and one cleaning process is completed. If the drainage pump 2 or the flow rate adjusting valve 4 is adjusted so that the drainage speed does not exceed the water supply speed after the second predetermined water level is detected, the water level is raised to the first predetermined water level while the drainage pump 2 is driven. The drain pump 2 and the water discharge valve 5 may be stopped after the first predetermined water level is detected.
In order to improve the washability of the toilet bowl, the above-described drainage and stored water replenishment may be used as one process, and control may be performed such that a plurality of processes are performed with a single start of cleaning.

FIG. 4a shows a time chart at the time of abnormality that cannot occur in normal operation of the apparatus. In addition to the first predetermined water level and the second predetermined water level, the control unit 7 is set with a third predetermined water level as a water level rising position that cannot occur during normal operation of the apparatus. When the pressure sensor 6 detects the third predetermined water level due to clogging of the drainage system, pump failure, etc., the drainage pump 2 operates to lower the accumulated water level. At the same time, the display 10 is activated to notify the user of the abnormality. At this time, a predetermined time is set in advance in the control unit, and if the accumulated water level does not fall to the first predetermined water level even after the predetermined time has elapsed since the start of the operation of the drainage pump 2, the control unit 7 is a device. It is determined that there is an abnormality, and the display 10 is kept operating, and the user is notified of the abnormality. This predetermined time takes into consideration the discharge capacity from the third predetermined water level to the first predetermined water level, the drainage capacity of the drainage pump 5 and the maximum allowable pipe resistance, and the third predetermined water level is surely set in the normal operation. It is set to a time longer than a predetermined water level.
FIG. 4b shows an example where the stored water supply process from the second predetermined water level to the first predetermined water level is not completed within a predetermined time. In this case, the control unit 7 determines that there is an abnormality such as a malfunction on the water supply side or a water leak and activates the display 10 to notify the user of the abnormality.
In addition, assuming that the water level sensor 6 is abnormal, a control for providing a water level detection unit different from the water level sensor 6 to detect the third predetermined water level and backing up the water level sensor 6 may be used.

  FIG. 5 shows a time chart at the time of abnormality different from FIG. When the third predetermined water level is detected, the drainage pump 2 is activated and the indicator 10 is activated. At this time, a predetermined time is set in advance, and if the time from the start of the drainage pump operation is detected within the predetermined time, for example, as shown in the figure, the control unit 7 determines that it has returned to normal and displays The instrument has stopped working.

  In the embodiment shown in FIG. 6, even if the predetermined time is set in advance and the cleaning has started and the time from the start of the drainage pump operation has elapsed, the stored water level remains at the second predetermined water level as shown in the figure, for example. When not descending, the control unit 7 determines that there is an abnormality and activates the display 10. In this example, an abnormality is determined based on the water level at the start of washing and the level of the stored water drainage. However, the water level may be between any two points, and a predetermined time between the two points is set and the abnormality is similarly determined. It doesn't matter.

  FIG. 7 is a time chart showing another example in which it is determined that there is an abnormality. Not only during the cleaning process and during use standby due to water leakage or water supply failure, but the second predetermined water level or less is detected immediately and the second predetermined water level is immediately detected. When it does not return to the water level or higher, the controller 7 determines that there is an abnormality and displays the abnormality on the display.

4, 5, 6, and 7, if the control unit 7 determines that the control unit 7 is abnormal from the operation status of water supply and drainage and the water level information, the control unit 7 displays an abnormality on the display 10. Good. In these cases, the abnormality is visually notified by the display device, but the abnormality may be notified by an alarm sound or the like. In order to prevent troubles such as overflow, it is possible to disable the water supply or to reject the acceptance of the control.

It is a block diagram which shows the outline of the pumping flush toilet of this invention. It is a time chart which shows the operation | movement which maintains the optimal stored water level of this invention. (A) is a first embodiment for maintaining the optimum water level, and (b) is a second embodiment for maintaining the optimum water level. It is a time chart figure which shows the washing | cleaning process of this invention. It is a time chart figure which the control part of the present invention judges as abnormal. (A) is a 1st Example which a control part judges as abnormal, (b) is a 2nd Example which a control part judges as abnormal. It is a time chart which shows the other Example which the control part of this invention judges to be abnormal. It is a time chart which shows the other Example which the control part of this invention judges to be abnormal. It is a time chart figure which shows the other Example which the control part of this invention judges as abnormality. It is sectional drawing which shows the pressure sensor installation of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Toilet bowl 2 ... Drain pump 3 ... Water conduit 4 ... Flow control valve 5 ... Water discharge valve 6 ... Water level sensor 7 ... Control part 8 ... Toilet water storage part 9 ... Operation part 10 ... Indicator 11 ... Vacuum breaker 12 ... Drain pipe 14 ... Sealing material 15 ... Signal line

Claims (8)

Toilet bowl,
Cleaning water supply means for supplying cleaning water to the toilet;
Toilet reservoir for holding flush water in toilet bowl, toilet outlet for discharging flush water in toilet bowl reservoir and toilet outlet for holding flush water in toilet bowl reservoir A trap pipe formed by a pipe communicated with
A drainage pump for draining the accumulated water from the toilet,
In the pressure-flushing flush toilet composed of
A pressure-flush flush toilet comprising a sensor for detecting the level of water stored in a toilet water storage unit, and a control unit for controlling the flush water supply means and the drain pump according to an output signal of the sensor. In order to maintain the optimal stored water level of the toilet, the control unit is set with a first predetermined water level that is the optimal stored water level, and the control unit is based on the stored water level information obtained from the sensor, When the water level is higher than the first predetermined water level, the drainage pump is driven to discharge the accumulated water, and when the water level is low, the cleaning water supply means is driven to supply water, and control is performed so that the optimum stored water level is reached. The pressure-flushing flush toilet according to claim 1. A start signal transmitting unit for transmitting a toilet cleaning signal to the control unit, wherein the control unit is set with a second predetermined water level for recognizing a drainage state of the stored water in the toilet reservoir, and the control unit Upon receiving a signal from the activation signal transmission unit, drains the water in the toilet water reservoir until the second predetermined water level or less, and the water level in the toilet water reservoir becomes equal to or lower than the second predetermined water level. 3. The pressure-flush flush toilet according to claim 1, wherein the operation of the washing water supply means and the drain pump is controlled so that the first predetermined water level is reached again when it is detected. The control unit controls operations of the washing water supply unit and the drainage pump so that the drainage rate exceeds the water supply rate until the sensor detects the second predetermined water level or less. Item 3. A pressure-fed flush toilet. The said control part controls operation | movement of the said washing water supply means and the said drainage pump so that a water supply speed may exceed a drainage speed, if the said sensor detects below the said 2nd predetermined water level. Or the pressure-flush flush toilet of Claim 4. The control unit drains the water stored in the toilet water storage unit from the first predetermined water level to the second predetermined water level or lower by a single cleaning start signal from the start signal transmitting unit, and the second predetermined water level. 6. The method according to claim 3, wherein after the water level is detected, a series of operations of supplying cleaning water into the toilet reservoir is repeated at least once to the first predetermined water level. Pressure-flushing flush toilet according to item. In the control unit, a third predetermined water level is set further above the first predetermined water level, and when the control unit detects the third predetermined water level or higher, the drainage is prioritized over all controls. The pressure-flush flush toilet according to any one of claims 1 to 6, wherein only the pump is controlled. Display means capable of receiving a signal from the control unit, wherein the sensor detects the above-mentioned third predetermined water level or higher, or the process of supplying or draining the water below the second predetermined water level or stored water for a predetermined time other than the cleaning process. The pressure-flushing flush toilet according to any one of claims 1 to 7, wherein when the control unit detects that it is not completed, the control unit activates the display means to notify the user of the abnormality.

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