JP5692422B2 - urinal - Google Patents

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 amount 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 An adjustment unit that adjusts water supply to the bowl portion, and a control unit that controls the adjustment unit to execute water supply from the water supply unit to the bowl portion. The control means executes the first cleaning mode and the second cleaning mode, and after executing the first cleaning mode, stops water supply for a predetermined time, and supplies cleaning water in the first cleaning mode. After at least a part of the drainage due to the water flows downstream from the connecting portion where the instrument drain pipe joins the drain side branch pipe, the water supply is resumed and the second cleaning mode is executed.
Further, in the urinal according to the present invention, the control means is discharged downstream from the trap portion in the second cleaning mode, rather than the instantaneous drainage amount discharged downstream from the trap portion in the first cleaning mode. The adjusting means is controlled so that the instantaneous drainage amount exceeds.
In the urinal according to the present invention, the control means controls the adjustment means so that the total water supply amount in the first washing mode exceeds the amount of water stored in the trap section.
Further, in the urinal according to the present invention, the control unit adjusts the adjusting unit so that the instantaneous water supply amount to the bowl part in the second cleaning mode is greater than the instantaneous water supply amount to the bowl part in the first cleaning mode. To control.
The urinal according to the present invention is characterized in that the adjusting means is a solenoid valve.

  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 human sensitive 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 urine in 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 to the urinal shown in FIG. It is the schematic which shows the mode of a trap part at the time of flowing wash water from the condition shown in FIG. It is the schematic which shows the mode inside an instrument drainage pipe and a drainage horizontal branch pipe at the time of flowing washing water from the situation shown in FIG. It is the schematic which shows the mode inside an instrument drainage pipe and a drainage horizontal branch pipe at the time of flowing washing water from the situation shown in FIG. FIG. 5 is a timing chart showing behaviors of the human sensor and the control unit shown in FIG. 2 and a behavior of a pattern different from that shown in FIG. 4. It is the schematic which shows the mode inside an instrument drainage pipe and a drainage horizontal branch pipe at the time of wash | cleaning based on the timing chart 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. 2 is a block diagram illustrating a functional configuration of the water supply unit 10. As shown in FIG. 2, the water supply unit 10 includes a human sensor 101, a control unit 102 (control unit), and an electromagnetic valve 103 (adjustment unit).

  The human sensor 101 is a sensor for detecting that a user who uses the urinal US stands in front of the urinal body 20. As the human sensor 101, a sensor such as an infrared sensor or a Doppler sensor is appropriately used. The human sensor 101 outputs a user detection result to the control unit 102.

  Based on the detection result of the human 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 solenoid 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 solenoid valve 103 (an instantaneous flow rate when passing through a pipe line in the vicinity of the solenoid 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 human sensor 101 and the control unit 102. 4A shows a detection signal output from the human 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 human sensor 101 outputs a detection signal indicating that the user is standing in front of the urinal body 20 from time t1 to time t2. . Since the detection signal is not output after the time t2, the control unit 102 determines that the urination is finished and the user has left.

  As shown in FIG. 4B, the control unit 102 outputs a control signal “1” for fully opening the electromagnetic valve 103 from time t3 to time t4. The control unit 102 does not output the control signal “1” for fully opening the electromagnetic valve 103 from time t4 to time t5. The control unit 102 again outputs a control signal “1” for fully opening the electromagnetic valve 103 from time t5 to time t6.

  When such control is performed, it will be described with reference to FIGS. 5 to 9 how the trap portion TP and the piping in the downstream thereof are formed. FIG. 5 is a schematic diagram showing the state of the trap portion TP when urinating into the urinal US. FIG. 6 is a schematic view showing the inside of the instrument drain pipe 50 and the drain side branch pipe 51 connected to the urinal US when urinating to the urinal US. FIG. 7 is a schematic view showing the state of the trap part TP when the washing water is flowed 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 washing water is flowed from the situation shown in FIG. FIG. 9 is a schematic view showing the inside of the appliance drain pipe 50 and the drain side branch pipe 51 when the washing water is further flowed 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. As shown in FIG. 5A, the urine Ur that has entered the drainage port 203 flows along the arrow A into the trap portion TP. Subsequently, as shown in FIG. 5B, the stored water Ws is pushed to the downstream overflow portion TPe by the inflow of the urine Ur.

  Subsequently, as shown in FIG. 5C, the stored water Ws is completely washed away, and the trap portion TP is filled with urine Ur. When urination ends, as shown in FIG. 5D, urine Ur remains in the upstream sealing portion TPb, the bottom portion TPc, and the downstream sealing portion TPd. The situation shown in FIGS. 5A to 5D corresponds 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 flowing in by urination is pushed out and the accumulated water Ws flows out downstream, the flow rate is relatively slow and the instantaneous flow rate is small. . Therefore, even if the stored water Ws flows into the drainage horizontal branch pipe 51, most of the water does not flow to the upstream side F but flows to the downstream side E.

  As shown in FIG. 6B, even if the urine Ur flows after the stored water Ws, the flowing speed is still relatively slow and the instantaneous flow rate is small. Therefore, even if the urine Ur flows into the drainage horizontal branch pipe 51, most of the portion does not flow to the upstream side F but flows to the downstream side E.

  Subsequently, as shown from time t3 to time t4 in FIG. 4, when the control signal “1” for fully opening the electromagnetic valve 103 is output from the control unit 102, the electromagnetic valve 103 is fully opened and the washing water is supplied from the spreader 35 to the bowl. It flows along the bowl wall surface 202 of the part 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 is pushed away to the downstream overflow portion TPe by the inflow of the washing water Wf.

  Subsequently, as shown in FIG. 7C, the urine Ur is completely washed away, and the trap portion TP is filled with the washing water Wf. When the first cleaning is completed, as shown in FIG. 7C, 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. The situation shown in FIGS. 7A to 7C corresponds to the time t3 to the time t4 in FIG.

  When the urine Ur is pushed away in the direction of arrow B as shown in FIG. 7B, it flows into the instrument drain pipe 50 as shown in FIG. Since the instrument drain pipe 50 is connected to the drain side branch pipe 51, the urine Ur flows into the drain side branch pipe 51. In FIG. 7B, since the urine Ur is pushed out to the washing water Wf and flows out to the downstream side, the flow rate is relatively fast and the instantaneous flow rate is large. Therefore, when the urine Ur flows into the drainage horizontal branch pipe 51, it is divided into an upstream side F and a downstream side E.

  Further, when the cleaning water Wf flows into the trap portion TP, the cleaning water Wf flows from the appliance drain pipe 50 on the downstream side to the drain side branch pipe 51 as well. As shown in FIG. 8B, when the wash water Wf having a relatively high instantaneous flow rate flows, the urine Ur is divided into the urine Ur1 flowing back to the upstream side F and the urine Ur2 flowing to the downstream side E.

  When the supply of the cleaning water Wf is completed, the cleaning water Wf flows to the downstream side E together with the urine Ur2 that flows to the downstream side E, as shown in FIG. Therefore, the urine Ur1 flowing back to the upstream side F is left without flowing into the washing water Wf. As shown in FIG. 8D, the remaining urine Ur1 gradually flows to the downstream side E, but remains attached to the inner tube wall of the drainage lateral branch pipe 51.

  Subsequently, as shown from time t5 to time t6 in FIG. 4, when the control signal “1” for fully opening the electromagnetic valve 103 is output again from the control unit 102, the electromagnetic valve 103 is fully opened and the washing water is supplied from the spreader 35. It flows along the bowl wall surface 202 of the bowl part 201. Wash water flows downstream from the drainage port 203 along the bowl wall surface 202. The washing water Wf that has entered the drainage port 203 flows into the trap portion TP. Since the replacement has been completed so that the urine Ur does not remain in the trap portion TP (see FIG. 7C), the wash water Wf (reserved water Ws) flows into the downstream overflow portion TPe by the inflow of the wash water Wf. Washed away.

  When the washing water Wf is pushed away in the direction of arrow B, it flows into the instrument drain pipe 50 as shown in FIG. Since the instrument drain pipe 50 is connected to the drain side branch pipe 51, the cleaning water Wf flows into the drain side branch pipe 51. Since the washing water Wf flows out to the downstream as it is, the flow rate is relatively fast and the instantaneous flow rate is large. Accordingly, when the cleaning water Wf flows into the drainage horizontal branch pipe 51, it is divided into an upstream side F and a downstream side E. Since the urine Ur remaining in the drainage horizontal branch pipe 51 gradually flows downstream, the portion of the wash water Wf that flows toward the upstream side F flows backward to cover the urine Ur.

  When the supply of the cleaning water Wf is completed, the cleaning water Wf flows to the downstream side E together with the remaining urine Ur1, as shown in FIG. 9B. Accordingly, as shown in FIG. 9C, the remaining urine Ur1 flows downstream together with the washing water Wf, and the urine Ur remaining on the inner tube wall of the drainage lateral branch pipe 51 is washed. Is done.

In order to further enhance the cleaning effect of the residual urine Ur1 described with reference to FIG. 9, the instantaneous flow rate of the wash water to be flown for the second time (the instantaneous flow rate (m ³ / s when passing through the conduit near the electromagnetic valve 103) ) Is relatively preferable. As described above, an example of control for relatively increasing the instantaneous flow rate of the cleaning water to be flown for the second time will be described with reference to FIG. FIG. 10 is a timing chart showing the behavior of the human sensor 101 and the control unit 102 and showing a behavior of a pattern different from that shown in FIG.

  10A shows a detection signal output from the human sensor 101 to the control unit 102, and FIG. 10B shows a control signal output from the control unit 102 to the electromagnetic valve 103. .

  As shown in FIG. 10A, the human sensor 101 outputs a detection signal indicating that the user is standing in front of the urinal body 20 from time t1 to time t2. . Since the detection signal is not output after the time t2, the control unit 102 determines that the urination is finished and the user has left.

  As shown in FIG. 10B, the control unit 102 outputs a control signal “0.7” for opening the electromagnetic valve 103 by 70% with respect to the full opening from time t3 to time t4. The control unit 102 does not output a control signal for opening the electromagnetic valve 103 from time t4 to time t5. The control unit 102 outputs a control signal “1” for fully opening the electromagnetic valve 103 from time t5 to time t6.

When such control is performed, the instantaneous flow rate of the cleaning water Wf supplied by opening the electromagnetic valve 103 by 70% from the time t3 to the time t4 (the instantaneous flow rate (m ³ when passing through the pipe line near the electromagnetic valve 103). / S)) is relatively lowered, so that the reverse flow of the urine Ur to the upstream side F is suppressed. Then, the instantaneous flow rate of the cleaning water Wf supplied by fully opening the solenoid valve 103 from time t5 to time t6 relatively increases. Therefore, as shown in FIG. 11, a larger amount of the washing water Wf flows back to the upstream side F surely than the urine Ur1 that flows back to the upstream side F, so that the remaining urine Ur1 can be washed away with certainty.

  In the example of the control signal shown in FIG. 10, an example is shown in which different pulse amplitudes are used to recognize different control signals, but the example of the control signal is not limited to this. For example, it is also a preferable aspect to control the pulse width modulation method. For example, it is also a preferable aspect to use different types of control signals indicating the opening degree of the electromagnetic valve 103 together. Specifically, from time t3 to time t4, a signal for setting the opening degree of the electromagnetic valve 103 to 70% with respect to the full opening is output through the first channel, and from time t5 to time t6, the electromagnetic valve 103 is opened. It is also preferable to output a signal for fully opening the degree through the second channel.

  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 and 31 as water supply means for supplying cleaning water Wf to the bowl part 201, and (3) adjusting the water supply from the water supply pipes 30 and 31 to the bowl part 201. And an electromagnetic valve 103 as an adjusting unit, and (4) a control unit 102 as a control unit that controls the electromagnetic valve 103 to supply water from the water supply pipes 30 and 31 to the bowl unit 201.

  The control unit 102 performs a first cleaning mode (control mode from time t3 to time t4 in FIGS. 4 and 10; the same applies hereinafter) in which at least urine Ur accumulated in the trap unit TP can be replaced by the cleaning water Wf. After performing the first washing mode, the water supply is stopped for a predetermined time (from time t4 to time t5 in FIGS. 4 and 10), and the waste water containing the urine Ur replaced by the supply of the washing water in the first washing mode Of the second cleaning mode (from time t4 to time t6 in FIG. 4 and FIG. 10) in which at least a part of the water drainage pipe 50 resumes water supply after flowing downstream from the connecting portion joining the drainage horizontal branch pipe 51. Control mode, and so on).

  In the urinal US according to the present embodiment, the control unit 102 first executes the first cleaning mode in which at least urine Ur accumulated in the trap unit TP can be replaced with the cleaning water Wf. By executing this first washing mode, water supply suitable for replacement of urine Ur is made by the electromagnetic valve 103, and after flowing through the bowl portion 201, it can flow into the trap portion TP and replace urine Ur. Since the water supply in the first cleaning mode is performed prior to the water supply in the second cleaning mode, the water supply suitable for the replacement of the urine Ur accumulated in the trap portion TP can be performed first.

  Further, in the urinal US according to the present embodiment, the control unit 102 executes the second cleaning mode after executing the first cleaning mode. By performing the first cleaning mode, water supply suitable for replacement of the urine Ur accumulated in the trap portion TP is performed, so that a liquid having a high concentration of urine Ur flows from the instrument drain pipe 50 into the drain side branch pipe 51 as drainage. The wastewater that has flowed into the drainage horizontal branch pipe 51 flows back to the upstream side F of the drainage horizontal branch pipe 51 if there is a large instantaneous flow rate, and flows to the downstream side E of the drainage horizontal branch pipe 51 if the instantaneous flow rate is not so large. To go. Therefore, in the second cleaning mode, water supply is stopped for a predetermined time after the first cleaning mode is executed. By stopping the water supply for a predetermined time in this way, even if the wastewater flowing into the drainage horizontal branch pipe 51 flows back to the upstream side F as in this embodiment, it can wait for it to flow to the downstream side E. . Further, in the second cleaning mode, the water supply is stopped after the drainage including the urine Ur replaced by the supply of the cleaning water Wf in the first cleaning mode flows to the downstream side E from the connection portion by stopping the water supply for a predetermined time. Resume. As a result of the execution of the first washing mode, the urine Ur in the trap portion TP has already been replaced, or even if it flows backward to the upstream side F of the drainage lateral branch pipe 51, the urine Ur is replaced to such an extent that no high urine concentration liquid remains. Yes. Therefore, no matter how the water supply in the second washing mode is set, the waste water that has already flowed to the downstream side E is washed away, so that there is a possibility that urine stones may be generated due to urine Ur remaining at a high concentration. Can be reduced.

  Thus, after executing the first cleaning mode in which the urine Ur accumulated in the trap part TP can be replaced by the cleaning water Wf, by executing the second cleaning mode including the water supply stop for a predetermined time, It is possible to provide a urinal US that can suppress the generation of urinary stones in the drainage lateral branch pipe 51 while ensuring water-saving performance.

  Further, in the urinal US according to the present embodiment, the control unit restarts the water supply in the second cleaning mode, and the drainage containing the urine Ur replaced by the supply of the cleaning water Wf in the first cleaning mode is the instrument drain pipe 50. It is also preferable to correspond to the timing at which the water flows downstream from the connecting portion that joins the drainage horizontal branch pipe 51.

  In this preferred embodiment, the resumption of water supply in the second cleaning mode corresponds to the timing at which the waste water in the first cleaning mode flows downstream from the connection portion, so that the waste water in the first cleaning mode is upstream from the connection portion. It becomes possible to resume water supply without being on the side. Therefore, no matter how the water supply in the second washing mode is set, it acts to wash away the waste water that has already flowed downstream, so that the possibility of urine stones due to the high concentration of urine Ur remains is ensured. Can be reduced.

  In the urinal US according to the present embodiment, the control unit 102 controls the electromagnetic valve 103 so that the total water supply amount (L) in the first cleaning mode exceeds the water amount (L) of the stored water Ws of the trap unit TP. doing.

  Thus, since the total water supply amount in the first cleaning mode is supplied so as to exceed the water amount of the trapped water Ws of the trap portion, the urine Ur in the trap portion TP is replaced or the upstream side of the drainage lateral branch pipe 51 is replaced. Even if it flows backward, it is possible to reliably replace the liquid so that a liquid with a high urine concentration does not remain. Therefore, in the water supply in the second washing mode, the drainage is performed while supplying the washing water to the trap portion TP in which the urine concentration is surely lowered. Therefore, the drainage in which the urine concentration is reliably lowered from the initial stage of the second washing mode is connected. Will flow into the drainage horizontal branch pipe 51 from the section. As a result, it is not necessary to excessively increase the amount of water in the second washing mode while suppressing the generation of urine stones, which can contribute to water saving more.

  Further, in the urinal US according to the present embodiment, the control unit 102 controls the electromagnetic valve 103 so that the total water supply amount (L) in the first cleaning mode exceeds the total water supply amount (L) in the second cleaning mode. ing.

  As described above, the electromagnetic valve 103 is controlled so that the total water supply amount (L) in the first cleaning mode exceeds the total water supply amount (L) in the second cleaning mode. More washing water Wf can be supplied by replacing the accumulated water containing urine Ur. On the other hand, since the total water supply amount in the second cleaning mode can be suppressed, the replacement rate is increased and the drainage lateral branch without excessively increasing the total water supply amount from the first cleaning mode through the second cleaning mode. It can be suppressed that the urine Ur remains in the tube 51 at a high concentration.

  Moreover, in the urinal US which concerns on this embodiment, the control part 102 is 2nd rather than the instantaneous drainage amount (instantaneous flow rate of the waste_water | drain discharged | emitted downstream) discharged | emitted downstream from the trap part TP in 1st washing | cleaning mode. In the cleaning mode, the electromagnetic valve 103 is controlled so that the instantaneous drainage amount discharged downstream from the trap portion TP is greater (see FIG. 10).

  As described above, since the instantaneous drainage amount in the second cleaning mode is greater than the instantaneous drainage amount in the first cleaning mode, the second cleaning is further performed on the upstream side F than the drainage in the first cleaning mode flows backward from the connecting portion to the upstream side F. The mode drainage flows backward (see FIG. 11). Therefore, the waste water containing urine can be surely flowed to the downstream side E also on the upstream side F from the connection portion where the instrument drain pipe 50 joins the drain side branch pipe 51.

  Moreover, in the urinal US which concerns on this embodiment, the control part 102 is instantaneous water supply to the bowl part 201 in a 2nd washing | cleaning mode rather than the instantaneous water supply amount (instant flow rate of water supply) to the bowl part 201 in a 1st washing | cleaning mode. The electromagnetic valve 103 is controlled so as to exceed the amount (see FIG. 10).

  Thus, by making the instantaneous water supply amount in the second cleaning mode exceed the instantaneous water supply amount in the first cleaning mode, it is possible to reliably exceed the instantaneous drainage amount in the second cleaning mode than in the first cleaning mode. Can do. Therefore, with a simple configuration in which the instantaneous water supply amount to the bowl portion 201 is made different, the waste water containing urine is reliably downstream even at the upstream side F from the connection portion where the device drain pipe 50 joins the drain side branch pipe 51. E can flow.

  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: Human 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 (4)

A urinal installed in a toilet and connected in the middle of a drainage side branch pipe extending laterally by an instrument drainage pipe,
A urinal having a bowl part for receiving a urine flow, a drain opening opened at the bottom of the bowl part, and a trap part for collecting urine and washing water flowing from the drain outlet and discharging the urine as drainage to the instrument drain pipe The body,
Water supply means for supplying cleaning water to the bowl part;
Adjusting means for adjusting the supply of cleaning water from the water supply means to the bowl portion;
Control means for supplying cleaning water from the water supply means to the bowl portion by controlling the adjustment means,
The control means includes
The first cleaning mode and the second cleaning mode are executed,
After executing the first cleaning mode in which the adjustment means is controlled to supply the cleaning water so that the total water supply amount exceeds the amount of water stored in the trap portion, the supply of the cleaning water is stopped for a predetermined time, and the first cleaning is performed. At least a part of the drainage discharged from the trap portion to the appliance drain pipe by the supply of cleaning water in the mode has flowed downstream from the connection portion where the appliance drain pipe is connected to the drain side branch pipe . The urinal characterized in that the second washing mode for restarting the supply of the washing water is executed later.   The control means adjusts the amount of instantaneous drainage discharged downstream from the trap part in the second cleaning mode to exceed the amount of instantaneous drainage discharged downstream from the trap part in the first cleaning mode. 2. A urinal according to claim 1, wherein the means is controlled.   The said control means controls the said adjustment means so that the instantaneous water supply amount to the bowl part in the said 2nd washing mode may exceed the instantaneous water supply amount to the bowl part in the said 1st washing mode. Item 3. A urinal according to item 1 or 2.   The urinal according to any one of claims 1 to 3, wherein the adjusting means is a solenoid valve.

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