JP6241343B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet equipped with a toilet bowl body and a water storage tank.

  Conventionally, as a tank-type flush toilet that flushes the bowl part of the toilet body with the wash water stored in the water storage tank and discharges the waste, the wash water in the storage tank passes through the water conduit of the toilet body, What is supplied to the bowl part from the water outlet is known.

In such flush toilets, since the water conduit of the toilet body is formed of earthenware, a manufacturing error occurs, and the pressure loss of the water conduit varies.
Therefore, individual differences existed in the instantaneous flow rate of the cleaning water discharged from the discharge port on the bottom surface of the water storage tank.

  If there is an individual difference in the instantaneous flow rate of the wash water discharged from the discharge port at the bottom of the water storage tank, there will be an individual difference in the amount of wash water discharged from the water storage tank. There is a possibility that it cannot be washed sufficiently.

  Therefore, the pressure loss in the water conduit is detected by measuring the water level drop time until the water level in the water tank drops from the initial water level before the start of washing to the predetermined water level, and the optimum drainage device drive time is determined from this pressure loss. There is known a flush toilet that determines the above (for example, see Patent Document 1).

JP 2012-132167 A

  However, in the flush toilet described in the above-mentioned Patent Document 1, the fluctuation amount of the water level lowering time to be measured is much smaller than the reference time of the water level lowering time, and the pressure loss of the water conduit in the toilet body is reduced. There is a problem that it is practically difficult to detect with high accuracy.

  Therefore, the present invention solves the problems of the prior art as described above, that is, the object of the present invention is to accurately detect the amount of water level change due to pressure loss in the water conduit of the toilet body, and to store the water tank. It is to provide a flush toilet in which the amount of flush water discharged from the toilet is uniform regardless of manufacturing errors of the toilet body.

  The invention according to claim 1 is a flush toilet comprising a toilet main body, a water storage tank for storing cleaning water for cleaning the toilet main body, and a control means for controlling water supply and drainage to the water storage tank. The toilet body includes a water conduit that guides wash water supplied from the water storage tank, and a bowl portion having a spout connected to the water conduit, and the water storage tank is provided at the bottom of the water storage tank. A drain outlet for supplying cleaning water in the water storage tank to the water conduit, a drain valve for opening and closing the drain outlet, a drain valve driving mechanism for driving the drain valve, and a water level for detecting the water level in the water tank A detection mechanism, and the control means drives the drain valve drive mechanism for a predetermined time and discharges wash water after driving the drain valve drive mechanism for a predetermined time before driving the drain valve drive mechanism for a predetermined time. Measured by the water level detection mechanism. By providing at least a drain valve driving mechanism control unit that adjusts the driving time or driving mode of the drain valve driving mechanism according to the amount of change in the water level based on the second water level in the water storage tank. It is a solution.

  According to the flush toilet of the present invention, the flush toilet includes control means for controlling the drain valve drive mechanism, thereby controlling the amount of flush water supplied from the water storage tank to the toilet body. Therefore, not only can the washing water be wasted, but also the control means drives the drain valve drive mechanism for a predetermined time and cleans the first water level in the water storage tank before driving the drain valve drive mechanism for a predetermined time. At least a drain valve drive mechanism control unit that adjusts the drive time or drive mode of the drain valve drive mechanism according to the amount of change in the water level based on the second water level in the water storage tank detected by the water level detection mechanism after discharging the water. Therefore, the drain valve drive mechanism control unit controls the drain valve drive mechanism based on the water level change amount that has a large fluctuation amount with respect to the reference amount, not the water level lowering time that has a much smaller fluctuation amount with respect to the reference amount. Because, the water level variation and accurately detected by the pressure loss of the water conduit of the toilet body, the water of the washing water discharged from the water tank can be made uniform regardless of the manufacturing error of the toilet bowl.

  The invention according to claim 2 further solves the above-described problem by the fact that the first water level is a water level measured by the water level detection mechanism in addition to the configuration of claim 1.

  According to the flush toilet of the invention according to claim 2, in addition to the effect produced by the invention according to claim 1, the drain valve drive mechanism controller appropriately uses the measured first water level. Therefore, the amount of water level change due to pressure loss in the water conduit of the toilet body can be detected more accurately, and the amount of wash water discharged from the water storage tank can be made uniform regardless of the manufacturing error of the toilet body.

  The invention according to claim 3 further solves the above-described problem by the fact that the first water level is the initial water level during normal cleaning in addition to the configuration of claim 1 or claim 2. .

  According to the flush toilet of the invention according to claim 3, in addition to the effect exerted by the invention according to claim 1 or claim 2, the drain valve drive mechanism controller using the initial water level during normal washing with little fluctuation In order to properly control the drain valve drive mechanism, the amount of water level change due to pressure loss in the waterway in the toilet body is detected more accurately, and the amount of wash water discharged from the water storage tank can be controlled regardless of manufacturing errors in the toilet body. It can be made uniform.

  According to a fourth aspect of the present invention, in addition to the structure described in any one of the first to third aspects, the water storage tank supplies wash water from a water supply source into the water storage tank. A water supply mechanism to be controlled, and the control means further includes a water supply mechanism control unit for controlling the water supply mechanism, while the control means is adjusting the drive time or drive mode of the drain valve drive mechanism, The water supply mechanism control unit further solves the above-described problem by prohibiting the supply of cleaning water into the water storage tank by the water supply mechanism.

  According to the flush toilet of the invention according to claim 4, in addition to the effect exerted by the invention according to any one of claims 1 to 3, the amount of change in the water level of the water storage tank when measuring the amount of change in water level Since the only factor is the drainage to the toilet body, it is possible to detect the amount of water level change due to the pressure loss of the waterway in the toilet body more accurately, and the amount of wash water discharged from the water storage tank is independent of the manufacturing error of the toilet body. It can be made uniform.

  The present invention not only eliminates waste of washing water, but also accurately detects the amount of change in water level due to pressure loss in the water conduit of the toilet body, and determines the amount of washing water discharged from the water storage tank due to manufacturing errors in the toilet body. Can be made uniform.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic of the flush toilet which is the first embodiment of the present invention. The time chart at the time of the normal washing | cleaning of the flush toilet which is 1st Embodiment of this invention. The schematic of the flush toilet in the drain valve opening time setting operation | movement of the flush toilet which is 1st Embodiment of this invention. The drain valve opening time setting operation | movement flowchart in the flush toilet which is 1st Embodiment of this invention. FIG. 3 is a relationship diagram between a water level change amount of a flush toilet and a drain valve opening setting time as a reference in the drain valve opening time setting operation in the flush toilet according to the first embodiment of the present invention.

  Below, based on FIG. 1, the flush toilet 100 which is 1st Embodiment of this invention is demonstrated.

FIG. 1 is a schematic view of a flush toilet 100 according to the first embodiment of the present invention. The flush toilet 100 according to the first embodiment of the present invention is placed on the toilet body 110 and the toilet body 110. And a control means 130 for controlling the water storage and drainage into the water storage tank 120.
The flush toilet 100 includes a control unit 130 that controls the storage and drainage of water in the water storage tank 120, thereby controlling the amount of cleaning water supplied from the water storage tank 120 to the toilet body 110.

The toilet main body 110 has a bowl portion 111 that receives the excrement in front of the toilet main body 110. At the upper edge of the bowl portion 111, there are formed a rim 111a and a water discharge port 111b for discharging the wash water supplied from the water storage tank 120 as the toilet flushing water Wc.
Furthermore, the toilet body 110 is formed with a water conduit 112 that guides the wash water supplied from the water storage tank 120 to the water outlet 111b behind the toilet body 110.

  The water storage tank 120 includes a water supply mechanism 125 that supplies cleaning water from a water supply source (not shown) into the water storage tank 120, a drain port 121 that supplies cleaning water stored in the water storage tank 120 to the toilet body 110 on the bottom surface, A drain valve 122 that opens and closes the drain port 121, a drain valve driving mechanism 123 that is driven by the drain valve 122, and a water level sensor 124 that is a water level detecting mechanism that detects the water level in the water storage tank 120.

  Since the water level sensor 124 moves up and down in conjunction with the surface of the wash water stored in the water storage tank 120, the water level according to the amount of water stored in the water storage tank 120 can be measured.

  The control unit 130 includes a water supply mechanism control unit 131 that controls the water supply mechanism 125, and a drain valve drive mechanism control that controls the drain valve drive mechanism 123 based on a water level change amount based on the water level in the water storage tank 120 detected by the water level sensor 124. And at least part 132.

  Then, based on FIG. 1 and FIG. 2, operation | movement of the flush toilet 100 which is embodiment of this invention is demonstrated.

  FIG. 2 is a time chart during normal cleaning of the flush toilet 100 according to the first embodiment of the present invention.

At time t <b> 1, the user operates a remote controller (not shown) of the flush toilet 100 to transmit a toilet flush start signal to the flush toilet 100.
When the flush toilet 100 receives the toilet cleaning start signal, the drain valve driving mechanism control unit 132 controls the drain valve driving mechanism 123, so that the drain valve 122 is opened.

  From the time t1 to the time t2 (t1 + T) when the drain valve opening time T has elapsed, the flush water in the water storage tank 120 is supplied from the drain port 121 to the toilet body 110.

  The wash water supplied to the toilet body 110 passes through the water conduit 112 and is discharged from the spout 111b to the rim 111a as the toilet wash water Wc.

  The toilet bowl cleaning water Wc supplied to the rim 111a descends while turning in the bowl portion 111, thereby washing the inside of the bowl portion 111.

  The water discharged from the water outlet 111b is continued even after the inside of the bowl 111 is washed, and the toilet flushing water Wc is stored as the accumulated water W in the bowl 111.

Further, at time t2 (t1 + T), the drain valve driving mechanism control unit 132 controls the drain valve driving mechanism 123, whereby the drain valve 122 is closed.
In addition, the water level in the water storage tank 120 at this time is referred to as a still water level EWL.

  After that, at time t3, the water supply mechanism control unit 131 controls the water supply mechanism 125 to start supplying cleaning water to the water storage tank 120. At time t4 when the water level in the water storage tank 120 becomes the initial water level SWL. Then, the supply of the washing water to the water storage tank 120 is stopped.

  In the normal washing of the flush toilet 100 according to the first embodiment of the present invention, the water supply to the water storage tank 120 is not limited to after the drain valve 122 is closed, and the toilet flushing start signal is sent to the flush toilet. Any time after 100 is received.

  Subsequently, the drain valve opening time setting operation by the control means 130 of the flush toilet 100 according to the first embodiment of the present invention will be described based on FIGS. 3 to 5.

  FIG. 3 is a schematic view of the flush toilet 100 in the drain valve opening time setting operation of the flush toilet 100 according to the first embodiment of the present invention, and FIG. 4 is the flush toilet according to the first embodiment of the present invention. 5 is a flowchart illustrating a drain valve opening time setting operation in the toilet 100.

First, when the flush toilet 100 is installed in a predetermined place and the construction is completed, the user operates a remote controller (not shown) of the flush toilet 100 to transmit a drain valve opening time setting signal to the flush toilet 100. .
When the flush toilet 100 receives the drain valve opening time setting signal, the drain valve opening time setting operation is started.

  When the drain valve opening time setting operation is started, the first water level L1 in the water storage tank 120 is measured using the water level sensor 124 in step S1.

Next, in step S <b> 2, the drain valve driving mechanism control unit 132 controls the drain valve driving mechanism 123 to raise the drain valve 122. When the drain valve 122 is opened, the drain port 121 is opened and the washing water in the water storage tank 120 is discharged.
The drain valve opening elapsed time Tm is started from the time when the drain valve 122 is pulled up.

Next, in step S3, it is determined whether or not the drain valve opening elapsed time Tm has passed a predetermined drain valve opening set time T0.
If the drain valve opening elapsed time Tm has passed the drain valve opening measurement time T0, the process proceeds to step S4. If the drain valve opening elapsed time Tm has not passed the drain valve opening measurement time T0, the drain valve is opened. The state of the drain valve 122 is maintained until the valve elapsed time Tm elapses more than the drain valve opening measurement time T0.
The drain valve opening measurement time T0 is shorter than the drain valve opening time T during normal cleaning in consideration of a flush toilet with a small pressure loss.

  Next, in step S <b> 4, the drain valve driving mechanism control unit 132 controls the drain valve driving mechanism 123 to lower the drain valve 122. By closing the drain valve 122, the drain port 121 is closed.

  Next, in step S5, the water level sensor 124 is used to measure the second water level L2 in the water storage tank 120 when the drain valve 122 is closed.

  Next, in step S6, the difference between the first water level L1 and the second water level L2 is taken to calculate the water level change amount ΔL.

  Next, in step S7, the drainage valve corresponding to the obtained ΔL is obtained from the relationship between the water level change amount ΔL of the flush toilet prepared in advance as shown in FIG. 5 and the drain valve opening time T. A valve opening time T is set.

For example, when the water level change amount ΔL is ΔL2 which is larger than the water level change amount ΔLs of the reference flush toilet, it is determined that the pressure loss is larger than that of the reference flush toilet, and the drain valve opening time T is It becomes T2 shorter than the drain valve opening time Ts of the flush toilet.
In addition, when the water level change amount ΔL is ΔL1 smaller than the water level change amount ΔLs of the reference flush toilet, it is determined that the pressure loss is smaller than the reference flush toilet, and the drain valve opening time T is It becomes T1 longer than the drain valve opening time Ts of the flush toilet.

Further, the relationship between the water level change amount ΔL of the flush toilet prepared in advance as shown in FIG. 5 and the drain valve opening time T is prepared as follows.
First, a pressure-loss maximum toilet M that is a flush toilet with the maximum pressure loss allowed for manufacturing and a pressure-loss minimum toilet m that is a flush toilet with the minimum pressure loss allowed for manufacturing are prepared.
Then, the water level change amounts ΔLmax and ΔLmin at the drain valve opening measurement time T0 are measured for the maximum pressure loss toilet M and the minimum pressure loss toilet m.
Next, with respect to the maximum pressure loss toilet M and the minimum pressure loss toilet m, drain valve opening times Tmax and Tmin until the water level is reduced to the target flush water amount are measured.
From the obtained ΔLmax and Tmax and ΔLmin and Tmin, the relationship between the water level change amount ΔL of the flush toilet and the drain valve opening time T as shown in FIG. 5 is obtained.

  Next, in step S8, the water supply mechanism control unit 131 controls the water supply mechanism 125 to start the supply of cleaning water to the water storage tank 120. The water level in the water storage tank 120 is determined to be the initial water level SWL. After the sensor 124 detects, the supply of the washing water to the water storage tank 120 is stopped, and the drain valve opening time setting operation is ended.

  As described above, the control unit 130 drives the drain valve driving mechanism 123 for a predetermined time and discharges the cleaning water after the drain valve driving mechanism 123 is discharged for a predetermined time. By providing a drain valve drive mechanism control unit 132 that adjusts the drive time or drive mode of the drain valve drive mechanism 123 by the water level change amount ΔL based on the second water level L2 in the water storage tank 120 measured by The drain valve driving mechanism control unit 132 controls the drain valve driving mechanism 123 based on the water level change amount ΔL having a large fluctuation amount with respect to the reference amount, not the water level lowering time in which the fluctuation amount is much smaller than the reference amount.

  Note that the water level measured by the water level sensor 124 is used as the first water level L1. When the first water level L1 is the water level measured by the water level sensor 124, the drain valve driving mechanism control unit 132 appropriately controls the drain valve driving mechanism 123 using the measured first water level L1.

  Furthermore, the initial water level SWL during normal cleaning is used as the first water level L1. Since the first water level L1 is the initial water level SWL at the time of normal cleaning, the drain valve driving mechanism control unit 132 appropriately controls the drain valve driving mechanism 123 using the initial water level SWL with little fluctuation.

Further, as the second water level L2, a water level higher than the water stop water level EWL during normal use is used.
Since the second water level L2 is higher than the water stop water level EWL, the second water level L2 does not fall below the water stop water level EWL even in the flush toilet 100 with a small pressure loss. The level change amount ΔL due to pressure loss can be detected, and the amount of washing water discharged from the water storage tank 120 can be made uniform regardless of the manufacturing error of the toilet body 110.

Further, while the control unit 130 is adjusting the driving time of the drain valve driving mechanism 123, the water supply mechanism control unit 131 prohibits the supply of cleaning water into the water storage tank 120 by the water supply mechanism 125.
Thereby, the factor of the water level change amount of the water storage tank 120 when measuring the water level change amount is limited to the drainage to the toilet body 110 only.

  However, since there is little variation in the flow rate of the cleaning water supplied from the water supply mechanism 125 into the water storage tank 120, the water supply mechanism control unit 131 while the control means 130 adjusts the drive time of the drain valve drive mechanism 123. May supply cleaning water into the water storage tank 120 by the water supply mechanism 125.

  Further, in the drain valve opening time setting operation of the flush toilet 100 according to the first embodiment of the present invention, after determining that the drain valve opening elapsed time Tm has passed the drain valve opening measurement time T0, Although the drain valve 122 is closed and the second water level L2 is measured, the second water level L2 may be measured without closing the drain valve 122.

  The flush toilet 100 according to the first embodiment of the present invention obtained as described above includes the control means 130 for controlling the drain valve driving mechanism 123, thereby eliminating the waste of washing water. Instead, the control unit 130 drives the drain valve drive mechanism 123 for a predetermined time and the water level detection mechanism after the drain valve drive mechanism 123 is driven for a predetermined time to discharge the wash water. A drain valve drive mechanism controller 132 that adjusts the drive time or drive mode of the drain valve drive mechanism 123 based on the water level change amount ΔL based on the second water level L 2 in the water storage tank 120 measured by the water level sensor 124. By providing, water level change amount ΔL due to pressure loss in the water conduit 112 of the toilet body 110 is accurately detected and discharged from the water storage tank 120. The amount of washing water can be made uniform regardless of the manufacturing error of the toilet body 110.

  Further, since the first water level L1 is the water level measured by the water level sensor 124, the level change amount ΔL due to the pressure loss of the water conduit 112 of the toilet body 110 is detected more accurately and discharged from the water storage tank 120. The amount of washing water can be made uniform regardless of the manufacturing error of the toilet body 110.

  Further, since the first water level L1 is the initial water level SWL at the time of normal cleaning, the water level change amount ΔL due to pressure loss in the water conduit 112 of the toilet body 110 is detected more accurately, and the cleaning water discharged from the water storage tank 120 The amount of water can be made uniform regardless of the manufacturing error of the toilet body 110.

  Further, the water storage tank 120 includes a water supply mechanism 125 that supplies cleaning water from a water supply source (not shown) into the water storage tank 120 and is controlled by the control means 130, and the control means 130 controls the water supply mechanism 125. The water supply mechanism control unit 131 prohibits the water supply mechanism 125 from supplying cleaning water into the water storage tank 120 while the control unit 130 adjusts the drive time or drive mode of the drain valve drive mechanism 123. By doing so, the water level change amount ΔL due to the pressure loss of the water conduit 112 of the toilet main body 110 can be detected more accurately, and the amount of washing water discharged from the water storage tank 120 is made uniform regardless of the manufacturing error of the toilet main body 110. be able to.

  The present invention is a flush toilet comprising a toilet body, a water storage tank for storing cleaning water for cleaning the toilet body, and a control means for controlling water supply and drainage to the water storage tank, wherein the toilet body includes: A water conduit that guides wash water supplied from the water storage tank, and a bowl portion having a water discharge port connected to the water conduit, the water storage tank being provided at the bottom of the water storage tank, A drain port for supplying cleaning water to the water conduit, a drain valve for opening and closing the drain port, a drain valve driving mechanism for driving the drain valve, and a water level detecting mechanism for detecting the water level in the water storage tank. And the control means drives the drain valve drive mechanism for a predetermined time before discharging the drain valve drive mechanism for a predetermined time, and discharges the wash water after driving the drain valve drive mechanism for a predetermined time. The detected storage A drain valve drive mechanism control unit that adjusts the drive time or drive mode of the drain valve drive mechanism according to the amount of change in the water level based on the second water level in the tank, and not only eliminates waste of washing water, but also toilet If the amount of water level change due to pressure loss in the main conduit is accurately detected and the amount of flush water discharged from the water storage tank can be made uniform regardless of the manufacturing error of the toilet body, the specific Such an embodiment may be anything.

For example, the flushing method of the flush toilet may be a wash-off type or a siphon-zette type.
The water level detection mechanism only needs to be able to detect the water level according to the amount of water stored in the water storage tank. The water level may be detected by measuring the water storage pressure with a pressure sensor, or the water level surface may be detected with ultrasound or laser. May be.
Further, the drain valve opening time setting operation is not limited to the time of installation, and may be periodically performed during use, or may be instructed by the user.
Further, the drain valve driving mechanism may control not only the drain valve driving time but also the opening degree of the drain valve.
The first water level may be a predetermined water level.

DESCRIPTION OF SYMBOLS 100 ... Flush toilet 110 ... Toilet body 111 ... Bowl part 111a ... Rim 111b ... Water outlet 112 ... Water conduit 120 ... Water storage tank 121 ... Drain port 122 .... Drain valve 123 ... Drain valve drive mechanism 124 ... Water level sensor (water level detection mechanism)
125 ... Water supply mechanism 130 ... Control means 131 ... Water supply mechanism control part 132 ... Drain valve drive mechanism control part L1 ... First water level L2 ... Second water level M ... Pressure loss maximum Toilet bowl m ... Pressure drop minimum toilet bowl SWL ... Initial water level EWL ... Stop water level T ... Drain valve opening time Tm ... Drain valve opening elapsed time T0 ... Drain valve opening Measurement time W ・ ・ ・ Reservoir Wc ・ ・ ・ Toilet wash water ΔL ・ ・ ・ Water level change ΔLs ・ ・ ・ Water level change ΔTs of standard flush toilet ・ ・ ・ Drain valve open of standard flush toilet Valve time

Claims (4)

In a flush toilet comprising a toilet body, a water storage tank for storing cleaning water for cleaning the toilet body, and a control means for controlling water supply and drainage to the water storage tank,
The toilet body includes a water conduit that guides wash water supplied from the water storage tank, and a bowl portion that has a spout connected to the water conduit,
The water storage tank is provided at the bottom of the water storage tank, and supplies a drain port for supplying cleaning water in the water storage tank to the water conduit, a drain valve for opening and closing the drain port, and a drain valve drive for driving the drain valve A mechanism, and a water level detection mechanism for detecting the water level in the water storage tank,
The control means measures the first water level in the water storage tank before driving the drain valve driving mechanism for a predetermined time, and the water level detecting mechanism after driving the drain valve driving mechanism for a predetermined time to discharge the wash water. A flush toilet comprising a drain valve drive mechanism control unit that adjusts the drive time or drive mode of the drain valve drive mechanism according to a water level change amount based on the second water level in the water storage tank. .   The flush toilet according to claim 1, wherein the first water level is a water level measured by the water level detection mechanism.   The flush toilet according to claim 1 or 2, wherein the first water level is an initial water level during normal washing. The water storage tank includes a water supply mechanism that supplies cleaning water from a water supply source into the water storage tank and is controlled by the control means,
The control means further includes a water supply mechanism control unit that controls the water supply mechanism,
While the control means is adjusting the drive time or drive mode of the drain valve drive mechanism, the water supply mechanism control unit prohibits the supply of cleaning water into the water storage tank by the water supply mechanism. The flush toilet according to any one of claims 1 to 3.

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