JP2012149415A - Urinal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a urinal capable of suppressing the formation of urinary calculi in a drain horizontal branch pipe while securing water-saving performance.SOLUTION: The urinal US supplies washing water just at a timing when urine discharged by a user reaches a bowl part so as to reduce the concentration of the urine accumulated mainly at a trap part.

Description

  The present invention relates to a urinal installed in a toilet and connected to a drain side branch pipe by an appliance drain pipe.

  In public men's toilets, urinals are installed separately from urinals. The place where the urinal is provided independently of the toilet is not limited to the public men's toilet, and such an installation mode is also employed in a residential toilet.

  An example of such a urinal is disclosed in Patent Document 1 below. As shown in FIGS. 1 to 5 of Patent Document 1 below, the urinal includes a bowl portion, a drain port disposed at the bottom of the bowl portion, a trap communicating with the drain port, and a trap end. And an outlet pipe connected to the drainage pipe. The bowl portion has a bowl wall surface constituting the bowl portion, an outer wall surface surrounding the periphery of the bowl wall surface, and an upper wall surface extending in a substantially horizontal direction forward from the upper end of the bowl wall surface.

  The drain opening is open at the bottom of the bowl and follows a generally U-shaped trap. There is a predetermined amount of water in the urinal trap, and as a result, the sealed water is stored up to a predetermined height. The outlet pipe communicates with the rear part of the trap and extends substantially horizontally and rearwardly. When installing the urinal, the outlet pipe is a drain pipe (the drain pipe connecting the urinal and the drainage side branch pipe which is the drain pipe on the downstream side, provided on the wall where the urinal is installed, (Hereinafter also referred to as an instrument drain pipe) through a packing. The appliance drain pipe is further connected to a drain pipe on the downstream side (hereinafter also referred to as a drain side branch pipe).

  Such urinals are often installed side by side, particularly in public toilets. As disclosed in Patent Document 2 below, when a plurality of urinals are installed side by side, a device drainage pipe from the urinal is connected in order from the upstream side to the downstream side of one drainage lateral branch pipe. .

JP-A-2005-290718 JP 2007-321371 A

  In the urinal trap described above, a predetermined amount of water is stored in a generally U-shaped trap to form a stored water, and sealed water up to a predetermined height is secured by the stored water. When urination is performed using a urinal, urine flows into the trap, a part of the accumulated water is discharged by the urine that flows, and urine and water are mixed in the trap. When washing water is poured into the bowl after urination, the washing water flows into the trap, and the trap is washed by discharging and replacing the liquid in which urine and water are mixed.

  In this way, when rinsing water is passed through the bowl portion to replace the urine in the trap with water, it is preferable that the urine remaining in the trap is reduced as much as possible in the state after replacement, that is, the state after cleaning. It is. However, if an attempt is made to replace substantially the entire amount of urine in the trap with water by increasing the replacement rate, it is necessary to increase the amount of washing water supplied relative to the amount of stored water in the trap.

  On the other hand, with the recent increase in environmental awareness, the desire to save water is further increasing, and the amount of washing water is required to be reduced as much as possible. In order to satisfy both the need for water saving and the need for improvement of the above-described replacement rate, the present inventors considered that it is effective to reduce the amount of stored water. Therefore, the present inventors made a prototype of a trap with a reduced amount of accumulated water, and verified what kind of event occurred when it was actually attached to a urinal.

  As a result of the verification, it was possible to improve the replacement rate of the trap even if the amount of washing water flowing into the bowl portion was reduced, and succeeded in sufficiently reducing the urine remaining in the trap. However, assuming a public men's toilet, it was discovered that urine stones were easily formed in the drainage horizontal pipe when multiple urinals were placed in succession. Specifically, urinals with a higher trap replacement rate while conserving water were continuously arranged, and the urinals were arranged to flow through one drainage side branch pipe from the continuously arranged urinals. When it was arranged in this way and an actual use test was conducted under normal use conditions, it was found that the number of urine stones generated in the drainage lateral branch pipes increased compared to before.

  The direct cause of the increase in urinary stones is that the urine poured from the urinal into the drainage lateral branch pipe remains as it is or in a liquid state with a high urine concentration. Stone is generated. Specifically, urea contained in urine is decomposed by bacteria, ammonia is generated, pH is increased by the ammonia, and calcium ions contained in urine and washing water are crystallized as calcium compounds inside the pipe. It is thought that it adheres and urine stones are generated. However, as described above, the present inventors have conducted verification using a urinal that reduces the amount of trapped water and supplies cleaning water corresponding to the reduced amount of stored water. Therefore, since the washing water sufficient to replace the urine remaining in the trap is supplied, if the urine that is suddenly integrated with the washing water flows from the drainage side branch pipe, It is difficult to assume that the urine remains in a liquid state (including urine as it is) in the tube.

  Therefore, the present inventors have further studied on the assumption that the washing water and urine are not integrated and flow into the drainage horizontal branch pipe. In the trap with a small amount of accumulated water, the urine concentration in the trap immediately after urination is higher than that in the conventional trap. On the other hand, even if the amount of washing water flowing to the bowl portion of the urinal is reduced as compared with the conventional case, it is necessary to ensure a certain amount of water because the washing water needs to be spread and flowed to the bowl portion. For this reason, when washing water that spreads sufficiently to the bowl portion after urination flows, a liquid with a high urine concentration in the trap is pushed out by the washing water and flows into the drainage lateral branch pipe. Considering the installation mode of the urinal, since the instrument drain pipe connected to the urinal is connected in the middle of the drainage side branch pipe, a part of the first flowing liquid once flows upstream and then The present inventors thought that it might return to the downstream side.

  As described above, in the trap with a small amount of stored water, the liquid that flows first is a liquid with a high urine concentration. Therefore, even if the wash water flows after that, the liquid with a high urine concentration that flows upstream The present inventors thought that the washing water would flow away before returning to the downstream side. If such a phenomenon has occurred, it is considered that a liquid with a high urine concentration tends to remain in the drainage lateral branch pipe in a state where the urine concentration is high, leading to generation of urinary stones. In order to avoid such a residual phenomenon of liquid with a high urine concentration in the drainage horizontal branch pipe, it is conceivable to increase the amount of washing water. However, such an increase in the amount of washing water cannot be employed because it is contrary to providing a urinal with excellent water-saving performance, which is the original purpose.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a urinal capable of suppressing generation of urinary stones in the drainage lateral branch pipe while ensuring water saving performance. It is in.

  In order to solve the above-described problems, a urinal according to the present invention is a urinal installed in a toilet and connected to a drain side branch pipe by an instrument drain pipe, and a bowl portion for receiving a urine flow; A urinal body having a drain opening that opens to the bottom, and a trap part that communicates with the drain to form sealed water, water supply means for supplying cleaning water to the bowl part, and from the water supply means Adjusting means for adjusting the water supply to the bowl portion, and control means for controlling the adjustment means to execute water supply from the water supply means to the bowl portion. Before the urine urinated toward the bowl portion flows into the trap portion, water supply to the bowl portion is performed so as to reduce the concentration of urine.

ADVANTAGE OF THE INVENTION According to this invention, the urinal which can suppress generation | occurrence | production of the urine stone in a drainage horizontal branch pipe can be provided, ensuring water saving performance.

It is sectional drawing which shows the urinal which is embodiment of this invention. It is a block diagram which shows the functional structure of the water supply unit shown in FIG. It is the schematic which shows the trap part shown in FIG. It is a timing chart which shows the behavior of the urine detection sensor and control part which are shown in FIG. It is the schematic which shows the mode of a trap part at the time of urination and water discharge to the urinal shown in FIG. It is the schematic which shows the mode inside the instrument drainage pipe connected to the urinal shown in FIG. 1, and a drainage side branch pipe at the time of urination and water discharge to the urinal shown in FIG. It is the schematic which shows the mode of a trap part when only wash water is discharged from the condition shown in FIG. It is the schematic which shows the mode inside an instrument drainage pipe and a drainage side branch pipe when only cleaning water is discharged from the situation shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  A urinal according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a cross-sectional view showing a urinal US which is an embodiment of the present invention. As shown in FIG. 1, the urinal US includes a water supply unit 10 (adjustment means, control means), a urinal body 20, water supply pipes 30, 31 (water supply means), a spreader 35, and a trap portion TP. It has. The urinal body 20 and the water supply unit 10 are attached to the wall surface WL of the building frame.

  The urinal body 20 includes a bowl portion 201. The bowl part 201 is a part that receives the urine flow from the user of the urinal body 20. The urine flow released from the user hits the bowl wall surface 202 behind the bowl portion 201 and flows downward. The urine flow that has flowed downward flows from the drain port 203 opened at the bottom of the bowl portion 201 to the trap portion TP. An eye plate 204 is disposed at the drain outlet 203.

  A spreader 35 is attached to the upper part of the bowl wall 202 on the wall WL side behind the bowl 201. A water supply pipe 31 is connected to the spreader 35 and is configured to discharge cleaning water supplied from the water supply pipe 31. The washing water discharged from the spreader 35 spreads in the width direction (direction passing through the paper surface of FIG. 1) along the bowl wall surface 202 and cleans the bowl wall surface 202. The washing water that has washed the bowl wall surface 202 flows from the drainage port 203 opened at the bottom of the bowl portion 201 to the trap portion TP.

  The water supply pipe 31 is a water supply pipe disposed in the urinal body 20. A water supply pipe 30 is connected to the upstream side of the water supply pipe 31. The water supply pipe 30 is a water supply pipe that connects the urinal body 20 and the water supply unit 10. The water supply unit 10 is connected to the building-side water supply pipe 40. The building-side water supply pipe 40 is disposed on the back side of the wall surface WL, supplies water from a water supply source, and sends it out to the water supply unit 10. The configuration of the water supply unit 10 will be described later.

  The trap portion TP is arranged so as to communicate with the drain outlet 203 of the urinal body 20 to form a sealed water. The trap part TP forms sealed water and feeds urine and washing water flowing from the drain outlet 203 to the appliance drain pipe 50 side as drainage. The instrument drain pipe 50 is disposed on the back surface side of the wall surface WL, and conveys waste water containing urine and washing water further downstream. The configuration of the trap unit TP will be described later.

  Next, the water supply unit 10 will be described with reference to FIG. FIG. 2A is a block diagram illustrating a functional configuration of the water supply unit 10. As shown in FIG. 2A, the water supply unit 10 includes a urine sensing sensor 101, a control unit 102 (control means), and an electromagnetic valve 103 (adjustment means).

  The urine detection sensor 101 is a sensor for detecting urine movement by the flow of urine when the urinal US is used. As the urine detection sensor 101, for example, a flow sensor as shown in FIG. 2B installed in the instrument drain pipe 50 behind the trap portion TP is used as appropriate. The urine detection sensor 101 outputs the detection result of the urine movement to the control unit 102.

  Based on the detection result of the urine sensor 101, the control unit 102 outputs a control signal for opening and closing the electromagnetic valve 103 to a predetermined opening at a predetermined timing so as to wash the user's urination. To do. A specific example of the control signal output by the control unit 102 will be described later.

The electromagnetic valve 103 is provided between the building-side water supply pipe 40 and the water supply pipe 30. When the electromagnetic valve 103 is closed, the water supplied from the building-side water supply pipe 40 is stopped so as not to flow into the water supply pipe 30. When the electromagnetic valve 103 is open, the water supplied from the building-side water supply pipe 40 has an instantaneous flow rate according to the opening degree of the electromagnetic valve 103 (an instantaneous flow rate when passing through a pipe line in the vicinity of the electromagnetic valve 103 (m ³ / S)) to the water supply pipe 30.

  Next, the trap unit TP will be described with reference to FIG. FIG. 3 is a schematic diagram showing the trap unit TP. As shown in FIG. 3, the trap part TP includes an upstream connection part TPa, an upstream sealing part TPb, a bottom part TPc, a downstream sealing part TPd, and a downstream overflow part Tpe in order from the upstream side. .

  The upstream connection portion TPa is a portion connected to the drain port 203 of the bowl portion 201. The drain port 203 is connected to the upstream side of the arrow A, and the urine and the wash water flowing into the drain port 203 from the bowl portion 201 flow into the upstream connection portion TPa along the arrow A.

  The upstream sealing portion TPb, the bottom portion TPc, and the downstream sealing portion TPd are formed to have a U shape so that water can accumulate. The water that has flowed in from the upstream connection portion TPa is configured to accumulate below the wear W that is the lower inner wall surface of the downstream overflow portion Tpe. The sealed water depth Wd is the length in the vertical direction between the wear W and the dip D that is the upper inner wall surface of the bottom portion TPc. Accordingly, the sealed water is formed by the upstream sealed water WS1 accumulated in the upstream sealed water portion TPb and the downstream sealed water WS3 accumulated in the downstream sealed water portion TPd.

  In this specification, the bottom stored water WS2 accumulated in the bottom portion TPc, the upstream sealed water WS1 and the downstream sealed water WS3 are combined to form the stored water Ws of the trap portion TP. In the present embodiment, the amount of the stored water Ws is formed to be about 100 mL, and cleaning is possible even with a small amount of water of about 0.5 L. In addition, in a normal type trap that is not a water-saving type, the amount of stored water is about 400 to 600 mL, and the amount of washing water is about 1.4 L. Therefore, the trap portion TP of this embodiment has extremely improved water saving. It has become. In the present embodiment, a U-shaped trap is adopted as the trap portion TP. However, it is also preferable to adopt another form of trap as long as the above-described function is achieved.

  Next, a specific example of the control signal output by the control unit 102 will be described with reference to FIG. FIG. 4 is a timing chart showing the behavior of the urine detection sensor 101 and the control unit 102. 4A shows a detection signal output from the urine detection sensor 101 to the control unit 102, and FIG. 4B shows a control signal output from the control unit 102 to the electromagnetic valve 103. .

  As shown in FIG. 4A, the urine detection sensor 101 outputs a detection signal indicating that the user is performing a urine operation from time t1 to time t2. Since the detection signal is no longer output after time t2, the control unit 102 determines that urination has ended.

  As shown in FIG. 4B, the control unit 102 outputs a control signal “1” for fully opening the electromagnetic valve 103 from time t1 to time t3.

  When such control is performed, how the trap portion TP and the downstream piping are formed will be described with reference to FIGS. FIG. 5 is a schematic diagram showing a state of the trap portion TP during urination when urination is performed in the urinal US. FIG. 6 is a schematic diagram showing the inside of the instrument drain pipe 50 and the drain side branch pipe 51 connected to the urinal US during urination when urinated to the urinal US. FIG. 7 is a schematic diagram showing the state of the trap part TP when urination is completed and only the washing water is allowed to flow from the situation shown in FIG. FIG. 8 is a schematic view showing the inside of the instrument drain pipe 50 and the drain side branch pipe 51 when urination is completed and only the washing water is allowed to flow from the situation shown in FIG.

  When urination is performed in the urinal US, a urine flow strikes the bowl wall surface 202 of the bowl portion 201, and the urine flows downstream from the drain outlet 203 through the bowl wall surface 202. At the same time, the washing water Wf is supplied and the urine Ur is diluted in the bowl portion 201, and enters the drain port 203 and flows into the trap portion TP along the arrow A as shown in FIG. Subsequently, as shown in FIG. 5B, the stored water Ws is washed away to the downstream overflow portion Tpe by the inflow of diluted urine Ur.

  Subsequently, as shown in FIG. 5C, the stored water Ws is completely washed away, and the trap portion TP is filled with the urine Ur diluted with the washing water Wf. When urination is completed, as shown in FIG. 5C, the urine Ur diluted with the washing water Wf remains in the upstream sealing portion TPb, the bottom portion TPc, and the downstream sealing portion TPd. The situations shown in FIGS. 5A to 5C correspond to the time t1 to the time t2 in FIG.

  As shown in FIG. 5B, when the stored water Ws is pushed away in the direction of arrow B, it flows into the appliance drain pipe 50 as shown in FIG. Since the instrument drain pipe 50 is connected to the drain side branch pipe 51, the stored water Ws flows into the drain side branch pipe 51. In FIG. 5 (B), since the urine Ur diluted by the wash water Wf flowing in by urination is pushed out and the stored water Ws flows out downstream, the flowing speed is relatively fast, The flow rate is high. Accordingly, when the stored water Ws flows into the drainage horizontal branch pipe 51, it is divided into an upstream side F and a downstream side E.

  As shown in FIG. 6B, when the diluted urine Ur flows after the stored water Ws, the flow rate is still relatively high and the instantaneous flow rate is high. Accordingly, when the diluted urine Ur flows into the drainage horizontal branch pipe 51, it is divided into an upstream side F and a downstream side E.

  Subsequently, when the urination is finished, only the cleaning water Wf flows along the bowl wall surface 202 of the bowl portion 201. Wash water flows downstream from the drainage port 203 along the bowl wall surface 202. As shown in FIG. 7A, the washing water Wf that has entered the drainage port 203 flows along the arrow A into the trap portion TP. Subsequently, as shown in FIG. 7B, the urine Ur diluted by the inflow of the wash water Wf is pushed away to the downstream overflow portion Tpe.

  Subsequently, as shown in FIG. 7C, the diluted urine Ur is completely washed away, and the trap portion TP is partially filled with the washing water Wf as shown in FIG. There is a part where air remains in the remaining part.

  As shown in FIG. 7B, when only the cleaning water Wf flows into the trap portion TP, the drainage branch pipe 51 from the appliance drain pipe 50 on the downstream side also remained in the trap portion TP. Diluted urine Ur flows. As shown in FIG. 8A, when diluted urine Ur having a relatively high instantaneous flow rate flows, it flows so as to be swept away to the downstream side E and the upstream side F.

Subsequently, when the diluted urine Ur remaining in the trap portion TP is completely washed away by the wash water Wf, only the wash water Wf flows into the trap portion TP as shown in FIG. Then, the cleaning water Wf also flows into the drainage horizontal branch pipe 51 from the instrument drainage pipe 50 on the downstream side. As shown in FIG. 8B, when the cleaning water Wf having a relatively high instantaneous flow rate flows in, the diluted urine Ur flows to the downstream side E and the upstream side F.
When this cleaning is completed, as shown in FIG. 7D, the cleaning water Wf remains as the stored water Ws in the upstream sealing portion TPb, the bottom portion TPc, and the downstream sealing portion TPd.

  As shown in FIG. 8C, the washing water Wf flows to the downstream side E together with the diluted urine Ur remaining in the drainage lateral branch pipe 51. Therefore, the remaining diluted urine Ur flows downstream along with the washing water Wf, and the diluted urine Ur remaining on the inner tube wall of the drainage lateral branch pipe 51 is washed.

  As described above, the urinal US according to the present embodiment is a urinal that is installed in a toilet and connected to the drainage side branch pipe 51 by the appliance drain pipe 50. The urinal US has (1) a bowl portion 201 that receives a urine flow, a drain port 203 that is open at the bottom of the bowl portion 201, and a trap unit TP that communicates with the drain port 203 to form a sealed water. The urinal body 20, (2) water supply pipes 30, 31 as water supply means for supplying cleaning water to the bowl part 201, and (3) adjustment for adjusting the water supply from the water supply pipes 30, 31 to the bowl part 201 The electromagnetic valve 103 as a means and (4) the control part 102 which can perform the water supply from the water supply pipes 30 and 31 to the bowl part 201 by predetermined timing by controlling the electromagnetic valve 103 are provided.

  Further, in the urinal US according to the present embodiment, when the user's urine comes to the bowl unit 201, the control unit 102 simultaneously dilutes the urine by supplying the cleaning water Wf to the bowl unit 201, and the trap unit TP. The concentration of urine flowing into the bowl is lowered, and the washing water Wf is supplied to the bowl even after the user's urination is completed. By supplying the cleaning water Wf during the urine operation, the cleaning water Wf is supplied to the bowl portion after the urination is completed, and at the same time, the urine Ur present in the trap portion Tp flows into the drainage lateral branch pipe 51 and flows upstream F Even if it flows backward, it is diluted to such an extent that no liquid with a high urine concentration remains. Therefore, it is possible to reliably reduce the possibility of urine stones due to the urine Ur remaining at a high concentration.

In this way, when the user's urine comes to the bowl portion, the cleaning water Wf is supplied to the bowl portion 201 at the same time to dilute the urine, so that the water saving performance is ensured while the drainage lateral branch pipe 51 is provided. A urinal US capable of suppressing generation of urine stones can be provided.

  Further, in the urinal US according to the present embodiment, the supply of the washing water Wf may be started after a time has passed so that the trap portion TP is not completely replaced with the urine Ur. For example, the wash water Wf is supplied to the bowl portion at a timing (states B to C in FIG. 5) at which time has passed so that the amount of urine flowing into the trap portion TP does not exceed the sealed water amount of the trap portion TP. To do.

When such water supply is performed, the urine Ur that has flowed into the trap portion TP is diluted by the stored water Ws of the trap portion TP. Thereafter, before the trap portion TP is completely replaced with the urine Ur, the cleaning water Wf is supplied to the bowl portion, and the urine Ur is diluted in the bowl portion and flows into the trap portion TP. At this time, the urine Ur present in the trap portion TP is diluted by the stored water Ws, and even if it flows into the drainage lateral branch pipe 51 and flows back to the upstream side F, the urine Ur does not remain at a high concentration. . Thereafter, the urination is completed, and only the cleaning water Wf flows from the trap portion TP into the drainage lateral branch pipe 51, and the cleaning water Wf flows to the downstream E together with the diluted urine Ur remaining in the drainage lateral branch pipe 51. To go. Therefore, it is possible to reliably reduce the risk of urine stone generation due to urine Ur remaining at a high concentration, and it is also possible to reduce the amount of water required for cleaning as compared with the conventional method.

  Further, in the urinal US according to the present embodiment, the control unit 102 detects the start and end of urine and is more than the instantaneous water supply amount of Wf (the instantaneous flow rate of water supply) while urine is being supplied to the bowl unit. It is also conceivable to control the solenoid valve 103 so that the instantaneous water supply amount (instantaneous water supply flow rate) of the cleaning water Wf after the end of urine is increased. Specifically, the instantaneous water supply amount of the cleaning water Wf is compared by setting the opening degree of the electromagnetic valve 103 to be lower than the opening degree of the electromagnetic valve 103 from time t2 to t3 between t1 and t2 in FIG. The electromagnetic valve 103 is fully opened between time t2 and t3, and is set to be higher than the instantaneous water supply amount of the cleaning water Wf from time t1 to t2.

  By performing such water supply, while the urine is being supplied to the bowl portion, the diluted urine Ur flows into the trap portion TP with a relatively low instantaneous water supply amount. When it flows in, the back flow to the upstream side F of the diluted urine Ur decreases. Subsequently, when the supply of urine is completed and cleaning is performed with a high instantaneous water supply amount, only the cleaning water is supplied to the trap portion TP and flows into the drainage lateral branch pipe 50. When the wash water Wf having a relatively high instantaneous flow rate flows into the drainage lateral branch pipe 50, it is divided into the upstream side F and the upstream side E, and the urine Ur remaining in the drainage lateral branch pipe 50 can be washed away to the downstream side E. . Accordingly, it is possible to reliably reduce the risk of urine stones due to the urine Ur remaining in the drainage lateral branch pipe 51 at a high concentration.

The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, but can be changed as appropriate. Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

US: urinal WL: wall surface 10: water supply unit 101: urine sensor 102: control unit 103: solenoid valve 20: urinal body 201: bowl portion 202: bowl wall surface 203: drain outlet 204: eye plate 30: water supply pipe 31 : Water supply pipe 35: Spreader 40: Building side water supply pipe 50: Appliance drain pipe 51: Drainage side branch pipe TP: Trap part TPa: Upstream connection part TPb: Upstream seal part TPc: Bottom part TPd: Downstream seal part Tpe: Downstream Overflow W: Wear D: Dip Wd: Sealed Depth WS1: Upstream Sealed Water WS2: Bottom Reserved Water WS3: Downstream Sealed Water Ur: Urine Ws: Retained Water Wf: Wash Water

Claims (1)

A urinal installed in a toilet and connected to a drain side branch pipe by means of an appliance drain pipe,
A urinal body having a bowl part for receiving a urine flow, a drain opening opened at the bottom of the bowl part, and a trap part communicating with the drain to form a sealing water;
Water supply means for supplying cleaning water to the bowl part;
Adjusting means for adjusting the water supply from the water supply means to the bowl part;
Control means for controlling the adjustment means to execute water supply from the water supply means to the bowl portion, and
The control means executes water supply to the bowl portion so as to lower the concentration of urine before the urine urinated by the user toward the bowl portion flows into the trap portion. Toilet bowl.

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