JP5441008B2 - Washing water tank apparatus and flush toilet equipped with the same - Google Patents

Description

  The present invention relates to a washing water tank apparatus and a flush toilet equipped with the same, and more particularly to a washing water tank apparatus for storing washing water for washing a toilet body and a flush toilet equipped with the same.

2. Description of the Related Art Conventionally, in a washing water tank device that stores washing water for washing a toilet bowl, a device that detects a predetermined water level such as a full water level of a washing water tank with an electric signal of a float switch is known (for example, see Patent Document 1). ). Such a float switch is turned on when, for example, the stop water level (full water level) of the wash water in the wash water tank is detected, and turned off when the wash water supply is stopped and the water level drops below the stop water level. Thus, the cleaning water is supplied into the cleaning water tank.
In addition, in the conventional washing water tank apparatus described above, even when not in use, the float switch is always operated as a countermeasure against water leakage due to water stoppage failure of the drain valve, etc., and in the state where the water level is lowered due to water leakage, the float switch is When the wash water is supplied to the wash water tank and then the water level reaches the full water level, the float switch is turned on and the operation of stopping the wash water supply is repeated. Users who have seen the problem are now informed of the abnormality.

JP 2009-2075 A

  However, in the conventional washing water tank apparatus described above, for example, as a result of taking measures against water leakage due to poor water stoppage of the drain valve, etc., the float switch is in a state where the water level is lowered due to water leakage until the user notices an abnormality in water leakage. Is turned off. Then, when the cleaning water is supplied into the cleaning water tank and reaches the full water level again, the float switch is turned on, and the water supply or stop operation of stopping the supply of the cleaning water is automatically repeated. As a result, the cleaning water leaks indefinitely from the cleaning water tank, and if it takes time for the user to notice abnormally, there is a problem that the cleaning water leaks in a large amount.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and even when the cleaning water leaks from the cleaning water tank when the cleaning of the toilet is started, the toilet is In addition to ensuring the minimum amount of cleaning water in the cleaning water tank required for cleaning, it is possible for the user to easily recognize that there is an abnormal condition and to allow the cleaning water in the cleaning water tank to leak indefinitely. It is an object of the present invention to provide a flush water tank apparatus and a flush toilet equipped with the flush water tank apparatus.

In order to achieve the above object, the present invention is a washing water tank device for storing washing water for washing a toilet bowl, wherein the washing water tank has a drain outlet formed on the bottom surface, and the washing water tank has washing water. Water supply means for supplying water, a drain valve for opening and closing the drain port of the washing water tank, a drain valve driving means for raising the drain valve and supplying washing water from the drain port to the toilet, and in the washing water tank A water level detecting means that is provided above and detects the water stop level of the wash water in the wash water tank, and controls the operation of the drain valve driving means so as to supply the toilet from the drain outlet based on a wash start signal. Control means, and the control means drives the drain valve when the water level detection means detects the stop water level of the wash water in the wash water tank after receiving the washing start signal. By driving the means, A normal washing mode in which the valve is raised to open the drainage outlet and the flushing water is supplied to the toilet bowl to perform flushing of the toilet bowl, and the water level detection means in the flush water tank after receiving the washing start signal. If the stop water level of the wash water is not detected, the toilet is washed after controlling the water supply means to supply the wash water to the wash water tank without operating the drain valve driving means. And an abnormal cleaning mode to be executed.
In the present invention configured as described above, in the state where the toilet is not cleaned before the control means receives the cleaning start signal, for example, the cleaning water tank is caused by a water stoppage failure of the drain outlet by the drain valve, etc. Even if there is an abnormality due to leakage of wash water from the toilet to the toilet, the water level detection means, drain valve drive means and water supply means do not operate, only the finite amount of wash water stored in advance in the wash water tank Will be leaked. Therefore, the leakage of the cleaning water in the cleaning water tank can be limited to a finite amount of cleaning water stored in advance in the cleaning water tank, and the leakage can be minimized. Further, even if such an abnormality due to water leakage occurs and the control means receives a washing start signal in a state where the water level in the washing water tank before toilet flushing is lower than the water stop water level, the water level detection means Since the stop water level of the wash water in the wash water tank is not detected, the abnormal wash mode different from the normal wash mode is executed, and the wash water is supplied to the wash water tank without operating the drain valve drive means. Control means. As a result, the toilet bowl can be reliably washed after securing the minimum amount of washing water in the washing water tank required for washing the toilet bowl. In addition, when the control means receives the washing start signal and the water level detection means does not detect the stop water level of the washing water in the washing water tank, the drain valve driving means is activated in general toilet flushing. Instead of the drain opening being opened and the toilet bowl being cleaned, the user is in an abnormal state where the drain valve drive means does not operate and water is supplied by the water supply means by executing the abnormal cleaning mode. Can be easily recognized. Therefore, it is possible to prevent the cleaning water in the cleaning water tank from leaking indefinitely.

In the present invention, preferably, the abnormal cleaning mode of the control means is the above when the water level detecting means does not detect the water stop level of the cleaning water in the cleaning water tank after receiving the cleaning start signal. After supplying the water supply means for a predetermined time without operating the drain valve driving means, the water supply means is stopped and the toilet is washed.
In the present invention configured as described above, even if the control means receives the cleaning start signal, if the water level detecting means does not detect the water stop level of the cleaning water in the cleaning water tank, the abnormal cleaning mode is set. In order to stop the water supply means after operating the water supply means without operating the drain valve driving means and supplying water for a predetermined time, the cleaning of the flush water tank is started. Even if water leakage has occurred, it is possible to ensure the minimum amount of water in the water tank required for cleaning the toilet bowl, and to stop after the water supply has been performed for a predetermined time in the abnormal cleaning mode. Thus, it is possible to prevent the cleaning water in the cleaning water tank from leaking without limit.

In the present invention, preferably, the water level detection means is a float switch.
In the present invention configured as described above, since the water level detecting means is a float switch, it is possible to detect the water stop level in the cleaning water tank at low cost, and the cleaning water in the cleaning water tank leaks. Even when it is, it is possible to prevent the water from leaking without limitation.

Moreover, this invention is the flush toilet provided with the washing water tank apparatus.
In the present invention configured as described above, even when the cleaning water leaks from the cleaning water tank when the toilet bowl cleaning is started, the amount of cleaning water in the cleaning water tank required for cleaning the toilet bowl is minimized. It is possible to provide a flush toilet that can ensure the limit and prevent the washing water in the washing water tank from leaking indefinitely.

  According to the flush water tank apparatus of the present invention and the flush toilet equipped with the flush toilet bowl, even when a wash water leak occurs in the flush water tank when washing the toilet bowl is started, In addition to ensuring the minimum amount of cleaning water in the cleaning water tank required for the operation, the user can easily recognize that there is an abnormal condition, and the cleaning water in the cleaning water tank will leak indefinitely. Can be prevented.

It is side surface sectional drawing which shows the flush toilet to which the flush water tank apparatus by one Embodiment of this invention was applied. It is a top view which shows the toilet bowl body of the state which removed the washing water tank apparatus from the flush toilet shown in FIG. It is a partial front view which shows the toilet bowl main body and washing water tank apparatus of the flush toilet shown in FIG. It is a top view which shows the inside of the washing water tank apparatus by one Embodiment of this invention. It is sectional drawing seen along the VV line of FIG. It is sectional drawing seen along the VI-VI line of FIG. It is a flowchart which shows the flow of a series of washing | cleaning operation | movement by one Embodiment of this invention.

Hereinafter, a cleaning water tank apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, a flush toilet to which a flush water tank apparatus according to an embodiment of the present invention is applied will be described with reference to FIGS.
FIG. 1 is a side sectional view showing a flush toilet to which a flush water tank apparatus according to an embodiment of the present invention is applied, and FIG. 2 is a toilet with the flush water tank apparatus removed from the flush toilet shown in FIG. FIG. 3 is a partial front view showing the toilet body and the flush water tank device of the flush toilet shown in FIG.

  As shown in FIGS. 1 to 3, reference numeral 1 denotes a wash-out flush toilet. The wash-out flush toilet 1 includes a toilet body 2, and the toilet body 2 has an upper front side. The bowl portion 4 is formed, and a water conduit 6 is formed in the upper part on the rear side, and a drain trap pipe 8 communicating with the bowl portion 4 is formed below the water conduit 6.

  An overhang-shaped rim 10 is formed on the inner side of the upper edge of the bowl portion 4 of the toilet body 2, and a first discharge that discharges wash water supplied from the water conduit 6 is formed in a part of the rim 10. The water port 12 is formed, and the wash water discharged from the first water discharge port 12 descends while swirling to wash the bowl portion 4.

In the vicinity of the drain trap pipe 8 and below the bowl portion 4, a water storage portion 14 is formed in which the water storage surface W ₀ is indicated by a one-dot chain line. Below the water reservoir 14, the inlet 8 a of the drain trap pipe 8 described above opens, and the ascending path 8 b extends rearward from the inlet 8 a. A descending path 8c continues to the ascending path 8b, and a lower end of the descending path 8c is connected to a discharge pipe (not shown) under the floor via a drain socket (not shown).

In addition, a second water discharge port 16 for discharging the cleaning water supplied from the water conduit 6 is formed at a position above the water storage surface W ₀ at the center lower portion of the bowl portion 4, and water is discharged from the second water discharge port 16. The washing water generates a swirling flow that swirls the water stored in the water storage section 14 in the vertical direction.

  Further, a washing water tank device 18 for storing washing water supplied to the toilet body 2 is provided above the water conduit 6 of the toilet body 2. The washing water tank device 18 includes a washing water tank 20. A drainage port 22 extending in the vertical direction is formed at the bottom of the washing water tank 20, and a lower end of the drainage port 22 is a water conduit 6 of the toilet body 2. The wash water in the wash water tank 20 is drained from the drain port 22 to the water conduit 6 of the toilet body 2.

Next, the washing water tank device 18 will be described with reference to FIGS. 4 is a plan view showing the inside of a cleaning water tank apparatus according to an embodiment of the present invention, FIG. 5 is a cross-sectional view taken along line VV of FIG. 4, and FIG. 6 is a cleaning of FIG. It is the fragmentary sectional view which looked at the inside of the water tank device from the toilet bowl front. In FIGS. 5 and 6, the water level (water stoppage level) when the water in the washing water tank 20 is full is indicated by W _L1 .

As shown in FIGS. 4 to 6, in the cleaning water tank 20, a water supply device 24 that supplies the cleaning water into the cleaning water tank 20, a drain device 26 that supplies the cleaning water to the toilet body 2, and the cleaning water tank 20. A water level sensor 28 (water level detecting means) is provided as a float switch for detecting a state in which the water level W of the cleaning water becomes the still water level W _L1, and various devices are provided outside the cleaning water tank 20. There are provided a controller 21 which is a control means for controlling, and an operation button 23 for transmitting a cleaning start signal operated by the user or a cleaning start signal when the user has selected automatic cleaning start. The operation button 23 includes, for example, operation buttons for cleaning modes (large cleaning mode, small cleaning mode, and eco small cleaning mode) using three types of cleaning water amounts. The cleaning water amount is, for example, 4.8 liters in the large cleaning mode. The small cleaning mode is 4.0 liters and the eco-cleaning mode is 3.8 liters.
The water level sensor 28 is not limited to a float switch, and may be an optical water level detection device or an ultrasonic water level detection device.

  The controller 21 is connected to the operation button 23, the water level sensor 28, the water supply valve 32, and the driving device 40 (drainage valve driving means). The controller 21 receives the cleaning start signal from the operation button 23 and controls to activate or stop the water level sensor 28. Furthermore, the controller 21 can control the water supply valve 32 and the driving device 40 to be driven or stopped.

The water supply device 24 includes a constant flow valve 30, a water supply valve 32, and a water supply port 34 connected to a water supply source (not shown) such as water supply.
In the water supply valve 32, the opening / closing operation of the water supply valve 32 is controlled by a command from the controller 21 based on the water level detection information of the water level sensor 28, and the supply of cleaning water from the water supply port 34 of the water supply device 24 into the cleaning water tank 20. Or the water stop can be switched. The water discharge port 34 discharges water in the direction of the wall opposite to the water level sensor 28 inside the cleaning water tank 20.

The drainage device 26 includes an overflow pipe 36, a drainage valve 38 fixed to the lower end portion of the overflow pipe 36, and a drive device 40 that opens and closes the drainage valve 38 by moving the overflow pipe 36 up and down by an electric driving force. I have.
A guide member 42 that guides the vertical movement of the drain valve 38 and regulates the height position is attached to the periphery of the drain port 22 of the cleaning water tank 20.

The overflow pipe 36 is a cylindrical pipe member that extends from the lower end opening 36a facing the drain 22 of the cleaning water tank 20 to the upper end opening 36b. When the water level W of the washing water in the washing water tank 20 is further raised to the water level W _OF exceed waterstop level W _L1 at full capacity, it exceeds the height position of the upper opening 36b of the overflow pipe 36 is The washing water overflows and is drained (supplied) from the drain opening 22 of the washing water tank 20 to the toilet body 2 side through the upper end opening 36b of the overflow pipe 36 and the lower end opening 36a.

  Further, the driving device 40 is a DC motor, and a ball chain 46 is attached to the tip of a rotating shaft 44 extending from the driving device 40. The lower portion of the ball chain 46 is attached to a ball chain attachment portion 36 c that protrudes downward from the lower end opening 36 a of the overflow pipe 36. When the rotating shaft 44 is rotated so that the driving device 40 pulls up the ball chain 46 upward, the overflow pipe 36 rises together with the ball chain 46, and when the driving device 40 rotates the rotating shaft 44 so as to pull down the ball chain 46. The overflow pipe 36 is lowered together with the ball chain 46.

Next, the operation (action) according to the embodiment of the present invention described above will be described with reference to FIG.
FIG. 7 is a flowchart showing a flow of a series of cleaning operations according to an embodiment of the present invention. Here, in FIG. 7, S represents each step.
First, in S1, the the washing water tank 20 of the washing water tank 18, the washing water is filled up to the water shut-off level W _L1 is a level at full capacity. In this state, after the user uses the toilet bowl, for example, when the operation button 23 for large washing is pressed, a washing start signal from the operation button 23 is transmitted to the controller 21, and then the operation of the water level sensor 28 is started. , the process proceeds to S2, it is determined whether or not the water level sensor 28 detects the water stopping water level W _L1.
Before the controller 21 receives the cleaning start signal, the water level sensor 28 is not activated, so that the water supply valve 32 does not supply cleaning water to the cleaning water tank 20.

Next, in S2, when the water level sensor 28 is determined to have detected a water stopping water level W _L1 performs "normal wash mode" on the operation of S3 and S4.
That is, in the normal cleaning mode, in S3, the controller 21 receives a signal that the water level sensor 28 has detected the water stop level W _L1 in S2, and drives the driving device 40 that is a drain valve driving means based on this signal. Then, the drain valve 38 of the drainage device 26 is raised to open the drain port 22, and flush water is supplied from the flush water tank 20 to the water conduit 6 of the toilet body 2, and the toilet bowl is washed in S 4.

On the other hand, if it is determined in S2 that the water level sensor 28 has not detected the water stop level W _L1 , it is determined that there is an abnormality such as a water stop failure due to the drain valve 38 at the drain port 22 of the wash water tank 20, and S5. And “abnormal cleaning mode” regarding the operation of S6.
That is, in the abnormal cleaning mode, in S5, the water supply device 24 is operated and the water supply valve 32 is opened and the water supply port is opened with the drain valve 38 of the drainage device 26 closing the drain port 22 without operating the drive device 40. Wash water is supplied from 34 into the wash water tank 20.

Further, in the abnormal cleaning mode in S5, the water supply device 24 is operated for a predetermined time by a timer (not shown) or the like while the drain valve 38 of the drain device 26 closes the drain port 22 without operating the driving device 40. Then, the water supply valve 32 is opened, and the cleaning water is supplied into the cleaning water tank 20 from the water supply port 34 for a predetermined time (for example, 60 seconds), the process proceeds to S6, and after the water supply is stopped, the process proceeds to S3. That is, the abnormal cleaning mode is executed in which S3 is executed through S5 to S6.
By the way, in normal toilet flushing, it takes about 6 seconds from when the controller 21 receives the washing start signal until the water supply device 24 starts to supply the washing water. Water supply in the cleaning mode may be started to make it easier to notify the user of the abnormality.

In addition, in this embodiment mentioned above, although the water supply apparatus 24 is operated by S5 and the predetermined time (for example, 60 second) passes, the pattern (pattern 1) controlled by a timer is employ | adopted so that water supply may be stopped by S6, instead of employing such a pattern 1, to operate the water supply apparatus 24 in S5, the water level sensor 28 is water level of the washing water tank 20 detects that reaches the water stop water level W _L1, stopping the water supply in S6 Such a pattern (pattern 2) may be employed, or the two patterns 1 and 2 described above may be employed in combination.
Further, when the amount of water leakage from the cleaning tank 20 is very small, it is possible to store the water storage tank 20 to the stop water level W _L1 more quickly by adopting the pattern 2 in which the transition from S5 to S6 is detected by the water level sensor 28. It is effective for.
On the other hand, when there is a relatively large amount of water leaking from the washing tank 20, the pattern 1 in which the transition from S5 to S6 is controlled by a timer is used, and the washing water leaks indefinitely in S5. This is effective because it can prevent a large amount of water from leaking.

Furthermore, in the abnormal cleaning mode in S5, even if the water level of the cleaning water tank 20 exceeds the water stop water level W _L1 , the water level W _OF corresponds to the height position of the upper end opening 36b of the overflow pipe 36. Is exceeded, the wash water overflows and is drained (supplied) from the upper end opening 36b of the overflow pipe 36 to the toilet body 2 side from the drain port 22 of the wash water tank 20 through the lower end opening 36a.

  Further, in S6, in the state immediately after the water supply by the water supply device 24 is stopped, even if water leakage occurs due to poor water stoppage of the drain port 22 of the wash water tank 20, the minimum level required for cleaning the toilet body 2 is minimized. The amount of washing water is secured in the washing water tank.

According to the washing water tank device 18 according to the above-described embodiment of the present invention, in the state where the controller 21 is not washing the toilet body 2 before receiving the washing start signal from the operation button 23, for example, a drain valve Even if the water leakage abnormality from the cleaning water tank 20 to the toilet body 2 occurs due to the water stoppage failure of the drain port 22 by 38, the water level sensor 28, the driving device 40 and the water supply device 24 do not operate. Only a finite amount of washing water stored in advance in the washing water tank 20 is leaked. Therefore, the leakage of the washing water in the washing water tank 20 can be stopped to a finite amount of washing water stored in the washing water tank 20 in advance, and the leakage can be minimized. Further, even if such an abnormality due to water leakage occurs and the controller 21 receives a washing start signal in a state where the water level in the washing water tank 20 before toilet flushing is lower than the water stop water level W _L1 , Since the water level sensor 28 does not detect the stop water level W _L1 of the wash water in the wash water tank 20, the controller 21 executes the abnormal wash mode different from the normal wash mode, and does not operate the drive device 40, and the drainage device The water supply device 24 is operated in a state where the drainage valve 38 of the 26 closes the drainage port 22, the water supply valve 32 is opened, and the cleaning water is supplied into the cleaning water tank 20 from the water supply port 34. As a result, the toilet bowl can be reliably washed after securing the minimum amount of washing water in the washing water tank 20 required for washing the toilet bowl. If the water level sensor 28 does not detect the stop water level W _L1 of the wash water in the wash water tank 20 after the controller 21 receives the wash start signal from the operation button 23, In this embodiment, instead of the drain valve opening the drain port and the toilet bowl cleaning operation being performed, by executing the abnormal cleaning mode, the drive device 40 does not operate and the drain valve 38 is drained. The user can easily recognize that the water supply by the water supply device 24 is performed for a predetermined time (for example, 60 seconds) in a closed state. Therefore, it is possible to prevent the cleaning water in the cleaning water tank 20 from leaking indefinitely.

Further, according to the flushing water tank apparatus 18 according to the present embodiment, the state in which the water level in the washing water tank 20 by the leakage of the washing water in the washing water tank 20 before the toilet flushing is decreased even more water stopping water level W _L1 in even the controller 21 receives a cleaning start signal from the operation button 23, when the water level sensor 28 does not detect the stopping water level W _L1 of the washing water in the washing water tank 20 executes the abnormality cleaning mode Thus, after the water supply device 24 is operated and water is supplied for a predetermined time without operating the drive device 40, the water supply is stopped. Therefore, the cleaning water in the cleaning water tank 20 is started when cleaning the toilet bowl is started. Even if water leakage occurs, it is possible to secure a minimum amount of washing water in the washing water tank required for washing the toilet bowl. Moreover, it can prevent the washing water of the washing water tank 20 leaking infinitely by stopping after water supply is performed for a predetermined time by abnormal cleaning mode.

Furthermore, according to the cleaning water tank apparatus 18 according to this embodiment, since the water level sensor 28 is a float switch, it is possible to detect the stop water level W _L1 in the washing water tank 28 at a low cost, the cleaning-water tank Even when 20 washing water leaks, it is possible to prevent the water from leaking indefinitely.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet bowl main body 4 Bowl part 6 Water conduit 8 Drain trap pipe 8a Drain trap pipe inlet 8b Drain trap pipe rise path 8c Drain trap pipe descent path 10 Rim 12 First outlet 14 Reservoir Water unit 16 Second water discharge port 18 Washing water tank device 20 Washing water tank 20a Bottom surface of washing water tank 21 Controller (control means)
22 Drain port 23 Operation button 24 Water supply device (water supply means)
26 Drainage device 28 Water level sensor (water level detection means)
30 Constant flow valve 32 Water supply valve 34 Water supply port 36 Overflow pipe 36a Lower end opening of overflow pipe 36b Upper end opening of overflow pipe 36c Ball chain attachment part of overflow pipe 38 Drain valve 40 Driving device (drain valve driving means)
42 Guide member 44 Rotating shaft 46 Ball chain

Claims (4)

A washing water tank device for storing washing water for washing a toilet,
A washing water tank with a drain outlet formed on the bottom;
Water supply means for supplying cleaning water to the cleaning water tank;
A drain valve for opening and closing the drain of the washing water tank;
A drain valve driving means for raising the drain valve and supplying wash water from the drain port to the toilet;
A water level detecting means provided above the wash water tank for detecting a stop water level of the wash water in the wash water tank;
Control means for controlling the operation of the drain valve driving means so as to supply the toilet from the drain port based on the washing start signal,
The control means drives the drain valve drive means to drive the drainage when the water level detection means detects the stop water level in the wash water tank after receiving the washing start signal. A normal washing mode in which the valve is raised to open the drainage outlet and the flushing water is supplied to the toilet bowl to perform flushing of the toilet bowl, and the water level detection means in the flush water tank after receiving the washing start signal. If the stop water level of the wash water is not detected, the toilet is washed after controlling the water supply means to supply the wash water to the wash water tank without operating the drain valve driving means. A cleaning water tank apparatus comprising: an abnormal cleaning mode to be executed.   The abnormal cleaning mode of the control means operates the drain valve driving means when the water level detecting means has not detected the water stop level of the cleaning water in the cleaning water tank after receiving the cleaning start signal. The washing water tank apparatus according to claim 1, wherein the water supply means is operated and water is supplied for a predetermined time, and then the water supply means is stopped to wash the toilet.   The washing water tank apparatus according to claim 1 or 2, wherein the water level detection means is a float switch.   A flush toilet comprising the flush water tank device according to any one of claims 1 to 3.

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