JP2013209836A - Toilet bowl washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toilet bowl washing device for well executing toilet bowl washing, capable of preventing offensive odors from being carried from a toilet bowl drainage path via a toilet bowl part into a toilet room.SOLUTION: The toilet bowl washing device includes a first water supply passage 22 communicated with a first water discharge port 15, a second water supply passage 23 communicated with a second water discharge port 16, and flow control devices 25, 26, 27 for separately controlling the flow of washing water in the first water supply passage 22 and the second water supply passage 23. The flow control devices execute first blow discharge for discharging the washing water from the second water discharge port 16 to carry sewerage, etc. in the downstream direction of a toilet bowl drainage path 12 with the force of the washing water, execute bowl discharge for the washing water discharged from the first water discharge port 15 to flow into the lower part of a toilet bowl part 11 during the first blow discharge, execute second blow discharge for reducing the flow amount of the washing water flowing in the second water supply passage 23 once and then increasing the flow amount again to push offensive odors in the toilet bowl drainage path 12 into the downstream direction with the force of the washing water discharged from the second water discharge port 16, and then end the bowl discharge.

Description

  The present invention relates to a toilet bowl cleaning device.

  Patent document 1 is disclosing the conventional flush toilet bowl. This flush toilet includes a toilet body and a toilet cleaning device. The toilet body has a toilet bowl and a toilet drainage channel communicating with the lower part of the toilet bowl. Moreover, the toilet bowl main body has the 1st water outlet which discharges wash water along the surface of a toilet bowl part, and the 2nd water outlet which discharges wash water in the toilet bowl drainage channel in the downstream direction. The toilet bowl cleaning device supplies cleaning water to the first water outlet and the second water outlet. The toilet drainage channel has a negative pressure delay part. This negative pressure delay part is comprised by forming a water film in the downstream part of a toilet drainage channel.

  When the flushing water is discharged from the second water discharge port, the flush toilet can convey filth and the like in the downstream direction of the toilet drainage channel by the momentum of the washing water. At this time, since the upstream end opening of the toilet drainage channel is exposed at the lower part of the toilet bowl, if the pressure in the toilet room is low, odor may be drawn from the toilet drainage channel into the toilet room through the toilet bowl. is there. However, this flush toilet can make it difficult for the odor in the drainage channel downstream of the water membrane to be drawn into the toilet room via the toilet bowl by the water film formed in the downstream part of the toilet drainage channel. .

JP 2006-28757 A

  However, the flush toilet of Patent Document 1 requires a structure for forming a water film on the downstream side of the toilet drainage channel. For this reason, the shape of the toilet drainage channel becomes complicated, which may affect the flow in the toilet drainage channel. Moreover, this flush toilet bowl is in a state where the water level in the toilet bowl is lowered by performing blow cleaning, and the upstream end opening of the toilet drainage channel is exposed at the lower part of the toilet bowl. At this time, if the water film is not well formed in the downstream part of the toilet bowl, the odor in the toilet drainage channel may be drawn into the toilet room through the toilet bowl.

  The present invention has been made in view of the above-described conventional situation, and performs toilet cleaning well and can prevent odor from being drawn into the toilet room from the toilet drainage channel through the toilet bowl. Providing a device is a problem to be solved.

The toilet bowl cleaning device of the present invention discharges the wash water in the downstream direction through the first water outlet for discharging the wash water along the surface of the toilet bowl and the toilet drainage channel communicating with the lower part of the toilet bowl. 2 A toilet cleaning device for supplying cleaning water to a water outlet,
A first water supply channel communicating with the first water outlet;
A second water supply channel communicating with the second water outlet;
A flow control device for separately controlling the flow of washing water in the first water supply channel and the second water supply channel,
This flow control device
Opening the second water supply channel, discharging the maximum amount of washing water from the second water discharge port, and executing the first blow water discharge to convey filth etc. in the downstream direction of the toilet drainage channel by the momentum;
The first water supply channel is opened during the first blow water discharge, and the water discharged from the first water discharge port is poured into the lower part of the toilet bowl part to execute the water discharge.
Once the flow rate of the wash water flowing through the second water supply channel is decreased, the flow rate of the wash water flowing through the second water supply channel is increased again, and the momentum of the wash water discharged from the second water discharge port Performing second blow water discharge to push the odor in the toilet drainage channel downstream,
After the second blow water discharge is executed, the second water supply path is closed to end the second blow water discharge, and then the first water supply path is closed to end the pot water discharge.

  This toilet flushing device opens the second water supply channel and executes the first blow spout from which the maximum flow rate of the flush water is spouted from the second spout. It is conveyed to the downstream side of the road, and the water level in the toilet bowl is lowered. In this state, when the first water supply channel is opened and the bowl water discharge is executed, the wash water discharged from the first water outlet flows down along the surface of the toilet bowl and flows into the lower part of the toilet bowl, and the second water outlet. It flows out to the downstream side of the toilet drainage channel by the momentum of the washing water discharged from the toilet. Thus, in the 1st blow spout, the inflow port which is an upstream end opening of a toilet drainage channel will be in the state exposed to the lower part of a toilet bowl part, and the water level in a toilet bowl part does not rise with the lowest water level. Moreover, in the 1st blow water discharge, the odor in a toilet drainage channel is also pushed in downstream by the wash water discharged from the 2nd water discharge port, and does not flow backward to the toilet bowl side.

  If the second water supply channel is closed in this state and the first blow-off water is finished, the inflow port of the toilet drainage channel is exposed at the lower part of the toilet bowl, so the toilet on which this flush toilet is placed If the air pressure in the room is low, odor may flow backward from the toilet drainage channel.

  For this reason, this toilet bowl washing | cleaning apparatus once performs the 2nd blow spout which increases the flow volume of the wash water which flows through a 2nd water supply path, after reducing the flow volume of the wash water which flows through a 2nd water supply path once. Once the flow rate of the wash water flowing through the second water supply passage is reduced, the wash water that has flowed into the lower portion of the toilet bowl portion is unlikely to flow out downstream of the toilet drainage passage. For this reason, the water level in a toilet bowl part can be raised. On the other hand, by reducing the flow rate of the wash water flowing through the second water supply channel, the odor in the toilet drainage channel may flow backward to the toilet bowl, so the flow rate of the wash water flowing through the second water supply channel is reduced. The time is set to a short time, and the second blow water discharge is executed again by increasing the flow rate of the cleaning water flowing through the second water supply channel. By pushing the odor in the toilet drainage channel to the downstream side by this second blown water, it is possible to prevent the odor in the toilet drainage channel from flowing back to the toilet bowl side.

  When the second water supply channel is closed and the second blow-off water is finished, the water level in the toilet bowl is maintained in an elevated state, so that the inflow port of the toilet drainage channel can be sealed with washing water at an early stage. . For this reason, the odor in the toilet drainage channel can be prevented from flowing back to the toilet bowl side.

  Therefore, the toilet bowl cleaning apparatus of the present invention can perform toilet bowl cleaning well and prevent odor from being drawn into the toilet room from the toilet drainage channel via the toilet bowl.

It is the schematic which shows the flush toilet bowl of an Example. It is a graph which shows the opening-and-closing signal of the 1st on-off valve and 2nd on-off valve of an Example. It is a graph which shows the flow volume change of the 1st water supply channel and 2nd water supply channel of an Example. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the toilet bowl washing | cleaning state of the flush toilet bowl of an Example, (I) shows the state which the water level in the toilet bowl part rose, (II) shows the water level in a toilet bowl part lowered by 1st blow water discharge. (III) shows a state in which the flow rate of the washing water flowing through the second water supply channel is reduced after the first blow water discharge, and the water level in the toilet bowl is raised, and (IV) is an odor due to the second blow water discharge. (V) shows a state in which the water level in the toilet bowl rises and a water seal part is formed.

  A preferred embodiment of the present invention will be described.

  The flow rate of the wash water flowing through the second water supply channel when executing the second blow water discharge of the present invention is less than the maximum flow rate of the wash water flowing through the second water supply channel when executing the first blow water discharge. Can do. In this case, when the second blow water discharge is executed, it is possible to push the odor in the toilet drainage channel in the downstream direction while suppressing a decrease in the water level in the toilet bowl. For this reason, since the water level in the toilet bowl portion is maintained at a position where the water level in the toilet bowl portion has risen after the completion of the second blow water discharge, the inflow port of the toilet drainage channel can be blocked early, and the toilet bowl can be closed from the toilet drainage channel. It is possible to prevent the odor from flowing back to the part side.

  The second blow water discharge of the present invention decreases the flow rate of the wash water flowing through the second water supply channel and increases the flow rate of the wash water flowing through the second water supply channel after the water level in the toilet bowl starts to rise. Can be. In this case, since the water level in the toilet bowl portion has risen after the second blown water discharge is completed, the inflow port of the toilet drainage channel can be blocked early. For this reason, it is possible to prevent the odor from flowing backward from the toilet drainage channel to the toilet bowl side.

  Next, an embodiment embodying a flush toilet equipped with the toilet cleaning device of the present invention will be described with reference to the drawings.

<Example>
As shown in FIG. 1, the flush toilet of the embodiment includes a toilet body 10 and a toilet cleaning device 20. The toilet body 10 includes a toilet bowl 11 and a toilet drainage channel 12. The toilet bowl 11 forms a rim water passage 13 formed in a step shape on the upper periphery. An inflow port 12 </ b> A that is an upstream end of the toilet drainage channel 12 opens at a lower portion of the toilet bowl 11. That is, the toilet drainage channel 12 communicates with the lower part of the toilet bowl 11. The toilet drainage channel 12 includes an ascending channel 12B that rises from the lower part of the toilet bowl 11 along the outer surface of the toilet bowl 11, and a descending channel that extends downward continuously from the upper end of the ascending channel 12B. 12C. The downstream end of the descending flow path 12 </ b> C is connected to the drainage connection member 14. The toilet drainage channel 12 communicates through the drainage connection member 14 with a drain pipe (not shown) drawn to the floor F of the toilet room in which the flush toilet is installed.

  The toilet body 10 has a first water discharge port 15 that opens at the upstream end of the rim water passage 13 and discharges wash water along the rim water passage 13. Further, the toilet body 10 is continuous to the rear of the first water discharge port 15 and forms a water discharge space for storing a bowl cleaning nozzle 24 described later. Further, the toilet body 10 has a toilet drainage nozzle 17 attached to the lower end of the ascending flow path 12B of the toilet drainage channel 12 and having a second water discharge port 16 formed at the center of the tip.

  The toilet bowl cleaning device 20 includes a first water supply path 22 and a second water supply path 23 formed by branching a water supply path 21 whose upstream end communicates with a water supply source. The first water supply path 22 has a bowl cleaning nozzle 24 at the downstream end, and is inserted into the toilet body 10 from the rear part of the toilet body 10 and is disposed in the water discharge space. For this reason, the cleaning water discharged from the bowl cleaning nozzle 24 flows through the water discharging space and flows out from the first water outlet 15 to the rim water passage 13. That is, the first water supply path 22 communicates with the first water discharge port 15. Further, the second water supply channel 23 is also inserted into the toilet body 10 from the rear part of the toilet body 10. The downstream end of the second water supply passage 23 is connected to the toilet drainage nozzle 17. That is, the second water supply path 23 communicates with the second water discharge port 16.

  The first water supply path 22 is provided with a first on-off valve 25 that is an electromagnetic on-off valve. The second water supply passage 23 is also provided with a second on-off valve 26 that is an electromagnetic on-off valve. The first on-off valve 25 and the second on-off valve 26 are controlled to open and close by a control device 27. This toilet flushing device 20 is a flow control device that separately controls the flow of washing water in the first water supply channel 22 and the second water supply channel 23 by the first on-off valve 25, the second on-off valve 26, and the control device 27. It is composed.

  The first on-off valve 25 and the second on-off valve 26 require time for the movement of the valve body when opening and closing. For this reason, the flow rate of the wash water flowing through the first water supply path 22 provided with the first on-off valve 25 or the second water supply path 23 provided with the second on-off valve 26 is gradually increased to the maximum flow rate when the valve is opened. It increases and gradually decreases to zero when the valve is closed.

  The toilet bowl cleaning apparatus 20 performs toilet bowl cleaning by operating a cleaning button (not shown) by a user of a flush toilet bowl. At this time, the first on-off valve 25 and the second on-off valve 26 are driven to open and close based on a control signal from the control device 27 as shown in FIG.

  When toilet flushing is executed, the toilet flushing device 20 first opens the first on-off valve 25 at time T1 (when toilet flushing is started). Then, the first water supply path 22 is opened, and the wash water flows out from the first water discharge port 15 along the rim water passage 13 through the first water supply path 22, and flows down along the surface of the toilet bowl portion 11. The pot water discharged into the lower part of the pot part 11 is executed. At this time, the flow rate of the wash water flowing through the first water supply path 22 (the flow rate of the wash water discharged from the first water discharge port 15) gradually increases from the time T1 to the maximum flow rate Q1, as shown in FIG. Reach. Then, as shown in FIG. 4 (I), the water level in the toilet bowl part 11 rises.

  The toilet bowl cleaning device 20 drives the first on-off valve 25 to close at time T2. Then, as shown in FIG. 3, the flow rate of the wash water flowing through the first water supply path 22 (the flow rate of the wash water discharged from the first water discharge port 15) gradually decreases from the time T2, and becomes zero after the time T3. become. In this way, the toilet bowl cleaning device 20 first performs bowl cleaning to wash away dirt and the like adhering to the surface of the toilet bowl 11 by flowing cleaning water along the surface of the toilet bowl 11.

  The toilet bowl cleaning device 20 drives the second opening / closing valve 26 to open at time T3 after time T2. Then, the second water supply path 23 is opened, and the wash water flows downstream from the second water discharge port 16 of the toilet drainage nozzle 17 through the second water supply path 23 along the ascending flow path 12B of the toilet drainage path 12. leak. At this time, the flow rate of the wash water flowing through the second water supply passage 23 (the flow rate of the wash water discharged from the second water discharge port 16) gradually increases from the time T3 to the maximum flow rate Q2, as shown in FIG. Reach. That is, the toilet bowl cleaning device 20 executes the first blow water discharge.

  The toilet flushing device 20 executes the first blow water discharge, and the wash water and filth in the toilet bowl 11 are conveyed to the downstream side of the toilet drainage channel 12 by the momentum of the wash water discharged from the second water discharge port 16. The The so-called toilet bowl cleaning device 20 performs jet cleaning. As a result, as shown in FIG. 4 (II), the water level in the toilet bowl 11 is lowered and the inflow port 12A of the toilet drainage channel 12 is exposed, and the water level in the toilet bowl 11 is at the lowest level. Does not rise. Further, in the first blow water discharge (during jet cleaning), the odor in the toilet drainage channel 12 is also pushed downstream by the wash water discharged from the second water discharge port 16 and does not flow backward to the toilet bowl 11 side.

  The toilet bowl cleaning device 20 drives the first opening / closing valve 25 to open at time T4 after time T3. Then, the first water supply path 22 is opened, and the wash water flows out from the first water discharge port 15 along the rim water passage 13 through the first water supply path 22, and flows down along the surface of the toilet bowl portion 11. The pot water discharged into the lower part of the pot part 11 is executed. At this time, the flow rate of the wash water flowing through the first water supply path 22 (the flow rate of the wash water discharged from the first water discharge port 15) gradually increases from time T4 to the maximum flow rate Q1, as shown in FIG. Reach. The wash water that has flowed down from the rim water passage 13 along the surface of the toilet bowl 11 and has flowed into the lower portion of the toilet bowl 11 is also downstream of the toilet drainage channel 12 due to the momentum of the wash water discharged from the second outlet 16. To leak. For this reason, the inflow port 12A of the toilet drainage channel 12 remains exposed, and the water level in the toilet bowl 11 remains at the lowest water level.

  And the toilet bowl washing | cleaning apparatus 20 carries out valve closing drive of the 2nd on-off valve 26 in the time T5 after the time T4. As shown in FIG. 3, the flow rate of the wash water flowing through the second water supply passage 23 (the flow rate of the wash water discharged from the second water discharge port 16) gradually decreases from the time point T5. At time T6 before the flow rate of the cleaning water flowing through the second water supply passage 23 becomes zero, the toilet bowl cleaning device 20 drives the second opening / closing valve 26 to open. Thereby, the flow rate of the wash water flowing through the second water supply passage 23 (the flow rate of the wash water discharged from the second water discharge port 16) gradually increases from the time point T6. Furthermore, at the time T7 (flow rate Q3) before the flow rate of the wash water flowing through the second water supply path 23 reaches the maximum flow rate Q2, the toilet bowl cleaning device 20 drives the second on-off valve 26 to be closed. As a result, the flow rate of the wash water flowing through the second water supply passage 23 (the flow rate of the wash water discharged from the second water discharge port 16) gradually decreases from time T7 to zero.

  As described above, the toilet bowl cleaning device 20 once reduces the flow rate of the wash water flowing through the second water supply channel 23 (the flow rate of the wash water discharged from the second water discharge port 16) at the time T5 to T6. Again, at time T6 to T7, the second blow water discharge for increasing the flow rate of the wash water flowing through the second water supply passage 23 (the flow rate of the wash water discharged from the second water discharge port 16) is executed.

  At the time T5 to T6, the flow rate of the wash water flowing through the second water supply channel 23 (the flow rate of the wash water discharged from the second water discharge port 16) decreases, so that the wash water flowing into the lower portion of the toilet bowl 11 is It becomes difficult to flow out to the downstream side of the toilet drainage channel 12. For this reason, as shown to FIG. 4 (III), the water level in the toilet bowl part 11 can be raised. On the other hand, by reducing the flow rate of the wash water flowing through the second water supply channel 23 (the flow rate of the wash water discharged from the second water discharge port 16), the odor in the toilet drainage channel 12 flows back to the toilet bowl 11 side. There is a fear. For this reason, at the time T6 after the water level in the toilet bowl 11 starts to rise, the flow rate of the wash water flowing through the second water supply passage 23 (the flow rate of the wash water discharged from the second water discharge port 16) is increased. Then, the second blow water discharge is executed.

  When the second blow water discharge is executed, the flow rate Q3 at the time T7 at which the wash water flowing through the second water supply passage 23 becomes maximum is the maximum flow rate of the wash water flowing through the second water supply passage 23 when the first blow water discharge is executed. Less than Q2. For this reason, by performing 2nd blow water discharge, as shown in FIG.4 (IV), the odor in the toilet drainage channel 12 can be pushed in downstream, suppressing the fall of the water level in the toilet bowl part 11. FIG. For this reason, since the water level in the toilet bowl 11 has been raised after the second blow water discharge is finished, the inlet 12A of the toilet drainage channel 12 can be closed early, and the toilet drainage It is possible to prevent the odor from flowing backward from the road 12 to the toilet bowl 11 side.

  Therefore, the toilet bowl cleaning device 20 according to the embodiment can satisfactorily wash the toilet bowl and prevent odor from being drawn into the toilet room from the toilet bowl drainage channel 12 through the toilet bowl 11.

  And the toilet bowl washing | cleaning apparatus 20 is the 1st on-off valve 25 in T8 time after the flow volume (flow volume of the wash water discharged from the 2nd water discharge port 16) which flows through the 2nd water supply path 23 becomes zero. Is closed. Then, as shown in FIG. 3, the flow rate of the wash water flowing through the first water supply path 22 (the flow rate of the wash water discharged from the first water discharge port 15) gradually decreases from time T8 to zero. As a result, as shown in FIG. 4 (V), the wash water flows down along the surface of the toilet bowl 11 from the first water supply path 22 through the first water discharge port 15, and the water level in the toilet bowl 11 increases. Then, a water seal part is formed, and toilet cleaning is finished. And the toilet bowl washing | cleaning apparatus 20 returns to the standby state of toilet bowl washing | cleaning.

The present invention is not limited to the 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 the embodiment, before the second on-off valve is driven to open to perform the first blow water discharge, the first on-off valve is driven to open and the bowl cleaning is executed. Instead, the second on-off valve may be driven to open to execute the first blow water discharge.
(2) In the embodiment, the flow control device that separately controls the flow of the cleaning water in the first water supply channel and the second water supply channel is configured by the first on-off valve, the second on-off valve, and the control device. The flow control device may be configured by providing a switching valve at a portion where the first on-off valve and the second on-off valve branch from the water supply channel.
(3) In the embodiment, the flow rate in the second blow water discharge is made smaller than the maximum flow rate in the first blow water discharge by shortening the valve opening time of the second open / close valve. The flow rate may be controlled by having it.

DESCRIPTION OF SYMBOLS 11 ... Toilet bowl part 12 ... Toilet drainage channel 15 ... 1st water discharge port 16 ... 2nd water discharge port 20 ... Toilet washing apparatus 22 ... 1st water supply channel 23 ... 2nd water supply channel 25, 26, 27 ... Flow control apparatus (25 ... 1st on-off valve, 26 ... 2nd on-off valve, 27 ... control apparatus)

Claims (3)

Wash water is supplied to a first water outlet that discharges wash water along the surface of the toilet bowl and a second water outlet that discharges wash water downstream in the toilet drainage channel communicating with the lower part of the toilet bowl. A toilet bowl cleaning device to supply,
A first water supply channel communicating with the first water outlet;
A second water supply channel communicating with the second water outlet;
A flow control device for separately controlling the flow of washing water in the first water supply channel and the second water supply channel,
This flow control device
Opening the second water supply channel, discharging the maximum amount of washing water from the second water discharge port, and executing the first blow water discharge to convey filth etc. in the downstream direction of the toilet drainage channel by the momentum;
The first water supply channel is opened during the first blow water discharge, and the water discharged from the first water discharge port is poured into the lower part of the toilet bowl part to execute the water discharge.
Once the flow rate of the wash water flowing through the second water supply channel is decreased, the flow rate of the wash water flowing through the second water supply channel is increased again, and the momentum of the wash water discharged from the second water discharge port Performing second blow water discharge to push the odor in the toilet drainage channel downstream,
After executing this second blow water discharge, the second water supply channel is closed to end the second blow water discharge, and then the first water supply channel is closed to end the pot water discharge. .   The flow rate of the wash water flowing through the second water supply path when the second blow water discharge is executed is less than the maximum flow rate of the wash water flowing through the second water supply path when the first blow water discharge is executed. The toilet bowl cleaning device according to claim 1, wherein:   The second blow-off water decreases the flow rate of the wash water flowing through the second water supply channel and increases the flow rate of the wash water flowing through the second water supply channel after the water level in the toilet bowl starts to rise. The toilet bowl washing device according to claim 1 or 2.

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