JP2011252344A - Urinal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a urinal capable of inhibiting urolith from developing in a drain lateral branch pipe while maintaining water saving capacity.SOLUTION: A urinal US performs a replacing mode for replacing urine stored mainly in a trap part with washing water (t3-t4), and subsequently, a washing mode for mainly washing a bowl part (t4-t5).

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 wall surface of the bowl portion constituting the bowl portion, an outer wall surface surrounding the periphery of the wall surface of the bowl portion, and an upper wall surface extending in a substantially horizontal direction forward from the upper end of the wall surface of the bowl portion.

  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 Adjusting means for adjusting the water supply to the bowl part, and control means capable of controlling the adjusting means to execute water supply from the water supply means to the bowl part and changing the instantaneous water supply amount of the water supply And comprising. The control means executes a cleaning mode for mainly cleaning the bowl portion after executing a replacement mode for replacing mainly urine accumulated in the trap portion with cleaning water.

  In the urinal according to the present invention, the control means first executes a replacement mode for replacing urine collected mainly in the trap portion with washing water. By executing this replacement mode, water supply suitable for urine replacement is made by the adjusting means, and after flowing through the bowl portion, flows into the trap portion and replaces urine. Since the water supply in the replacement mode is performed prior to the water supply in the cleaning mode, the water supply is more suitable for the replacement of the urine accumulated in the trap part than the bowl part cleaning, and the liquid containing the replaced urine is contained. When flowing into the drainage horizontal branch pipe, water supply that is more suitable for suppressing the backward flow upstream can be performed first.

  Furthermore, in the urinal according to the present invention, the control means executes a cleaning mode for mainly cleaning the bowl portion after executing the replacement mode. By executing this cleaning mode, water is supplied that is suitable for cleaning the bowl by the adjusting means, and flows into the trap after flowing through the bowl. Since the water supply in the cleaning mode is performed after the water supply in the replacement mode, it is possible to perform water supply adjusted so as to surely spread over the cleaning target area of the bowl portion. By executing the replacement mode, the urine in the trap portion has already been replaced, or is replaced to such an extent that no liquid with a high urine concentration remains even if it flows backward to the upstream side of the drainage lateral branch pipe. Therefore, no matter how the water supply in the cleaning mode is set, it is possible to reliably reduce the possibility of urine stones due to the remaining liquid with a high urine concentration.

  In this way, after executing the replacement mode for replacing the urine accumulated in the trap portion with the cleaning water, by executing the cleaning mode for cleaning the bowl portion, while ensuring water saving performance, It is possible to provide a urinal capable of suppressing the occurrence of urine stones in the drainage lateral branch pipe.

  In the urinal according to the present invention, it is also preferable that the control means controls the adjustment means by shifting from the replacement mode to the washing mode after the urine concentration in the trap portion becomes a predetermined value or less. .

  In this preferred embodiment, the replacement mode is executed while the urine concentration exceeds a predetermined value, and the mode is changed from the replacement mode to the cleaning mode so that the cleaning mode is executed after the urine concentration becomes equal to or lower than the predetermined value. Therefore, while the urine concentration exceeds the predetermined value, the replacement mode for replacing the urine accumulated in the trap portion with the washing water is executed, so that the liquid having a high urine concentration does not remain in the drainage lateral branch pipe. Such water supply can be performed. On the other hand, by executing the washing mode after the urine concentration has fallen below the predetermined value, even if water supply suitable for washing the bowl portion is performed, liquid with a high urine concentration does not reliably remain in the drainage lateral branch pipe It becomes possible to do so.

  Further, in the urinal according to the present invention, the control means makes the replacement mode different from an instantaneous water supply amount to the bowl portion in the replacement mode and an instantaneous water supply amount to the bowl portion in the cleaning mode. It is also preferable to shift from to the cleaning mode.

  In this preferred embodiment, the instantaneous water supply amount to the bowl portion in the replacement mode is different from the instantaneous water supply amount to the bowl portion in the cleaning mode. Therefore, in the replacement mode, the instantaneous water supply amount suitable for replacing the urine in the trap portion can be supplied, while in the cleaning mode, the instantaneous water supply amount appropriate for the bowl portion cleaning can be supplied. . Therefore, it is possible to reliably shift from the replacement mode to the cleaning mode by a simple method in which the instantaneous water supply amount to the bowl portion in the replacement mode is different from the instantaneous water supply amount to the bowl portion in the cleaning mode.

  In the urinal according to the present invention, it is also preferable that the control means controls the adjusting means so that the instantaneous water supply amount in the washing mode is larger than the instantaneous water supply amount to the bowl portion in the replacement mode. .

  In this preferable aspect, the instantaneous water supply amount in the cleaning mode is controlled to be larger than the instantaneous water supply amount to the bowl portion in the replacement mode. Therefore, in the replacement mode, a relatively small instantaneous water supply amount suitable for replacing the urine in the trap portion is supplied, while in the cleaning mode, a relatively large instantaneous water supply amount suitable for cleaning the bowl portion is provided. Water can be supplied. Therefore, it is possible to reliably shift from the replacement mode to the cleaning mode by a simple method of increasing the instantaneous water supply amount to the bowl portion in the cleaning mode rather than the instantaneous water supply amount to the bowl portion in the replacement mode.

  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 of a trap part at the time of flowing washing 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.

  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 “0.7” for opening the electromagnetic valve 103 by 70% with respect to the full opening from time t3 to time t4. Subsequently, the control unit 102 outputs a control signal “1” for fully opening the electromagnetic valve 103 from time t4 to time t5.

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 t4 to time t5 relatively increases.

  In the example of the control signal shown in FIG. 4, an example in which different control signals are recognized by changing the pulse amplitude is shown, 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 t4 to time t5, the electromagnetic valve 103 is opened. It is also preferable to output a signal for fully opening the degree through the second channel.

  When such control is performed, how the trap part TP and the downstream pipe are formed will be described with reference to FIGS. 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 a state of the trap part TP when the washing water is further flowed from the situation shown in FIG. FIG. 10 is a schematic view showing the inside of the instrument drain pipe 50 and the drain side branch pipe 51 when 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 “0.7” for opening the electromagnetic valve 103 by 70% with respect to the full opening is output from the control unit 102, the electromagnetic valve 103 is turned on. 70% is opened and the washing water flows from the spreader 35 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 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 partially filled with the wash water Wf, and there is a portion where air remains in the remaining portion.

  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, although the urine Ur is pushed out to the wash water Wf and flows out downstream, the feed water flow rate (instantaneous flow rate of the supplied water) of the wash water Wf is 70% with respect to the full open. Therefore, the flow rate is relatively slow and the instantaneous flow rate is small. Accordingly, when the urine Ur flows into the drainage lateral branch pipe 51, most of the portion flows to the downstream side E without flowing back to the upstream side F.

  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 cleaning water Wf having a relatively small instantaneous flow rate flows, the urine Ur flows to the downstream side E so as to push it to the downstream side E.

  Subsequently, as shown from time t4 to time t5 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 fed 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. 9A, the wash water Wf that has entered the drainage port 203 flows along the arrow A into the trap portion TP. As shown in the figure, the trap portion TP is filled with the cleaning water Wf. When the cleaning is completed, as shown in FIG. 9B, 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. 9A, when the cleaning 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. In (A) of FIG. 9, since the wash water Wf supplied by fully opening the solenoid valve 103 flows out to the downstream side, the flow rate is relatively fast and the instantaneous flow rate is large. It is. 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.

  As shown in FIG. 10A, the wash water Wf flows to the downstream side E together with the remaining urine Ur. Therefore, as shown in FIG. 10 (B), the remaining urine Ur flows away downstream with the wash water Wf, and the urine Ur remaining on the inner tube wall of the drainage lateral branch pipe 51 is washed. Is done.

  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 solenoid valve 103 as a means, and (4) control that can control the solenoid valve 103 to execute water supply from the water supply pipes 30 and 31 to the bowl portion 201 and change the instantaneous water supply amount of the water supply. Unit 102.

  The control unit 102 mainly executes a replacement mode (control from time t3 to time t4 shown in FIG. 4) for replacing urine accumulated in the trap unit TP with the washing water Wf, and then mainly performs the bowl unit 201. A cleaning mode (control 9 from time t4 to time t5 shown in FIG. 4 is executed.

  In the urinal US according to the present embodiment, the control unit 102 first executes the replacement mode for replacing the urine Ur accumulated mainly in the trap unit TP with the washing water Wf. By executing this replacement mode, the water supply suitable for the replacement of the urine Ur is made by the electromagnetic valve 103, and after flowing through the bowl portion 201, flows into the trap portion TP and replaces the urine Ur. Since the water supply in the replacement mode is performed prior to the water supply in the cleaning mode, the water supply is more suitable for the replacement of the urine Ur accumulated in the trap portion TP than the cleaning of the bowl portion 201, and the replaced urine Ur When the liquid containing water flows into the drainage horizontal branch pipe 51, water supply that is more suitable for suppressing the backflow to the upstream side F can be performed first (see FIGS. 7 and 8).

  Further, in the urinal US according to the present embodiment, the control unit 102 executes a cleaning mode for mainly cleaning the bowl unit 201 after executing the replacement mode. By executing this cleaning mode, water suitable for cleaning the bowl portion 201 by the electromagnetic valve 103 is supplied, and after flowing through the bowl portion 201, flows into the trap portion TP. Since the water supply in the cleaning mode is performed after the water supply in the replacement mode, the water supply adjusted so as to surely spread over the cleaning target region (mainly the bowl wall surface 202) of the bowl portion 201 can be performed. By executing the replacement mode, the urine Ur in the trap portion TP has already been replaced, or has been replaced to the extent that no liquid with a high urine concentration remains even if it flows backward to the upstream side F of the drainage lateral branch pipe 51. Therefore, no matter how the water supply in the cleaning mode is set, it is possible to reliably reduce the possibility of urine stones due to the urine Ur remaining at a high concentration.

  In this way, after executing the replacement mode for replacing the urine Ur accumulated in the trap portion TP with the cleaning water, the cleaning mode for cleaning the bowl portion 201 is executed, thereby ensuring water saving performance. However, the urinal US that can suppress the generation of urinary stones in the drainage lateral branch pipe 51 can be provided.

  Further, in the urinal US according to the present embodiment, the control unit 102 is set to control the electromagnetic valve 103 by shifting from the replacement mode to the washing mode after the urine concentration of the trap unit TP becomes equal to or lower than a predetermined value. Has been. Specifically, as shown in FIGS. 7A to 7C, after the urine Ur is pushed out from the trap portion TP and the trap portion TP is filled with the wash water Wf, As shown in (A) to (B), a large flow rate of water is supplied.

  As described above, the replacement mode is executed while the urine concentration exceeds the predetermined value, and the replacement mode is shifted to the cleaning mode so that the cleaning mode is executed after the urine concentration becomes equal to or lower than the predetermined value. Therefore, while the urine concentration exceeds the predetermined value, by executing the replacement mode for replacing the urine Ur accumulated in the trap portion TP with the washing water Wf, the liquid with a high urine concentration is surely discharged. Water can be supplied so as not to remain in 51 (see FIG. 8). On the other hand, by executing the cleaning mode after the urine concentration becomes equal to or lower than the predetermined value, even if water supply suitable for the cleaning of the bowl portion 201 is performed, a liquid with a high urine concentration is surely supplied to the drainage lateral branch pipe 51. It is possible not to remain (see FIG. 10).

  In the urinal US according to the present embodiment, the control unit 102 also includes an instantaneous water supply amount (instant flow rate of water supply) to the bowl unit 201 in the replacement mode and an instantaneous water supply amount (instant water supply) to the bowl unit 201 in the cleaning mode. By changing the flow rate), the replacement mode is shifted to the cleaning mode.

  As described above, in the replacement mode, the instantaneous water supply amount suitable for replacing the urine Ur of the trap portion TP is supplied, while in the cleaning mode, the instantaneous water supply amount appropriate for cleaning the bowl portion 201 is supplied. It can be performed. Therefore, it is possible to surely shift from the replacement mode to the cleaning mode by a simple method in which the instantaneous water supply amount to the bowl portion 201 in the replacement mode is different from the instantaneous water supply amount to the bowl portion 201 in the cleaning mode. .

  Further, in the urinal US according to the present embodiment, the control unit 102 has a larger instantaneous water supply amount (instantaneous flow rate of water supply) in the cleaning mode than an instantaneous water supply amount (instantaneous flow rate of water supply) to the bowl unit 201 in the replacement mode. The electromagnetic valve 103 is controlled so as to be.

  As described above, in the replacement mode, a relatively small instantaneous water supply amount suitable for replacing the urine Ur of the trap portion TP is supplied, while in the cleaning mode, the relatively high amount suitable for cleaning the bowl portion 201 is relatively high. A large amount of instantaneous water supply can be performed. Therefore, it is possible to surely shift from the replacement mode to the cleaning mode with a simple method of increasing the instantaneous water supply amount to the bowl unit 201 in the cleaning mode rather than the instantaneous water supply amount to the bowl unit 201 in the replacement mode. .

  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 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 capable of controlling the adjusting means to execute water supply from the water supply means to the bowl portion and changing the instantaneous water supply amount of the water supply,
The control means executes a cleaning mode for mainly cleaning the bowl part after executing a replacement mode for replacing mainly urine accumulated in the trap part with cleaning water. A urinal to do.   2. The small control unit according to claim 1, wherein the control unit shifts from the replacement mode to the washing mode after the urine concentration in the trap portion becomes a predetermined value or less and controls the adjustment unit. Toilet bowl.   The control means shifts from the replacement mode to the cleaning mode by making the instantaneous water supply amount to the bowl portion in the replacement mode different from the instantaneous water supply amount to the bowl portion in the cleaning mode. The urinal according to claim 2.   The said control means controls the said adjustment means so that the instantaneous water supply amount in the said washing | cleaning mode may become larger than the instantaneous water supply amount to the said bowl part in the said replacement mode. Toilet bowl.

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