JP6432254B2 - urinal - Google Patents

Description

  The present invention relates to a urinal connected to a drain pipe.

  In a drainage pipe connected to a men's urinal, there is a problem that urine stones are generated, which deteriorates the flow of urine and washing water, or closes the drainage pipe and renders the urinal unusable. Urine stone is thought to occur in the following process. That is, urea contained in the urine remaining in the drain pipe is decomposed by bacteria in the drain pipe to generate ammonia, thereby increasing the pH of the waste water containing urine remaining in the drain pipe. When pH becomes high, the solubility of the calcium compound and magnesium compound which a calcium ion and magnesium ion contained in urine react with a phosphate ion etc. will produce | generate, and these compounds will precipitate. This is urine stone.

  Conventionally, in order to prevent the generation of urinary stones, a method is known in which washing water or waste water containing a component for preventing the generation of urinary stones is introduced into a drain pipe. For example, as described in Patent Document 1, a urinal that prevents the generation of urinary stones by causing low pH wastewater to flow into the drainage pipe by dissolving a drug that lowers pH in advance into the drainage flowing into the drainage pipe. In addition, a urinal is known in which drainage pipes are supplied with wash water containing a sterilizing component to sterilize the drainage pipes, thereby suppressing an increase in pH and preventing the occurrence of urinary stones.

JP 2002-326098 A

  However, in the conventional method, in order to suppress the generation of urinary stones, it is necessary to pour a liquid containing a sterilizing component or an acidic component into the drainage pipe. As a result, these components are discharged to the outside through the drainage pipe. This is not preferable from the viewpoint of environmental load.

  Therefore, the inventors of the present application, as in the prior art, have urine stones in the drainage pipe connected to the urinal without flowing a liquid containing a sterilizing component or an acidic component that causes environmental burden into the drainage pipe. We have devised a urinary stone suppression method based on a completely new concept that can suppress the occurrence. Specifically, before the urine discharged by the user flows into the drain pipe, the urine stone component ions are removed from the urine to reduce the amount of urinary stone component ions flowing into the drain pipe. More specifically, it is a method of adsorbing urinary stone component ions from urine by electrostatic attraction and holding the adsorbed urolithic component ions. However, in the case of adsorbing and holding the urolith component ions in this way, it is necessary to treat the held urolith component ions in order to continuously adsorb and hold the urolith component ions. However, if maintenance is required for this purpose, such as replacing the urine stone component ion adsorption means with a new one, maintenance work is required.

  The present invention has been made in view of such problems, while adsorbing and holding urinary stone component ions from urine, while suppressing the occurrence of urinary stones in the drainage pipe while reducing the environmental load, An object of the present invention is to provide a urinal capable of reducing maintenance work.

  In order to solve the above-described problems, a urinal according to the present invention is a urinal connected to a drain pipe, and includes a bowl portion that receives urine and drainage that opens at the bottom of the bowl portion and communicates with the drain pipe. A urinary stone component ion, which is a component of urinary stone, so that the urine received by the bowl portion can be prevented from flowing into the drainage pipe so that the urine stone can be prevented from flowing into the drainage pipe. The urine stone component ions are adsorbed by electrostatic attraction, and the urine stone component ion adsorption means for holding the adsorbed urolith component ions, and the urine stone component ion adsorption means so as to flow into the drain pipe via the urine stone component ion adsorption means. Water supply means for supplying water to the urine stone, and control means for controlling the urine stone component ion adsorption means and the water supply means. Adsorption mode to adsorb and A desorption mode in which the urolithic component ions held by the urolithic component ion adsorbing means are desorbed, and the dehydrated urolithic component ions are discharged from the drain pipe by supplying water from the water supply unit; Can be executed.

  In the present invention, the urine stone component ion adsorption means adsorbs the urine stone component ions contained in the urine by electrostatic attraction before the urine discharged from the user flows into the drain pipe connected to the urinal. At the same time, the adsorbed urolith component ions are retained. Therefore, it is possible to reduce the amount of urolith component ions contained in urine flowing into the drain pipe. Thereby, even if urine remains in the drainage pipe, the amount of urinary stone component ions remaining in the drainage pipe can be reduced, so that the occurrence of urolith can be suppressed. As described above, in the present invention, the generation of urinary stones can be suppressed without causing the drainage pipe and the washing water containing the sterilizing component and the acidic component for suppressing the increase in pH to the drainage pipe to flow into the drainage pipe. Generation of urinary stones can be suppressed while reducing the load.

  Further, in the present invention, the control means for controlling the urolithic component ion adsorbing means includes an adsorption mode for adsorbing urolithic component ions from urine by the urolithic component ion adsorbing means, and a urolith held by the urolithic component ion adsorbing means. The desorbed urolithic component ions are discharged from the drainage pipe by supplying water from the water supply means that desorbs the component ions and supplies the water to the drainage pipe through the urolithic component ion adsorption means. The desorption mode can be executed. Therefore, even when the amount of urolithic component ions held by the urolithic component ion adsorbing means becomes large, by executing the desorption mode, the retained urolithic component ions are desorbed and drained. It can be discharged from the tube, and it is possible to continuously adsorb and hold urinary stone component ions. Therefore, it is possible to reduce the maintenance work such as replacing the urine stone component ion adsorption means while reducing the environmental load and suppressing the generation of urine stone.

  In the urinal according to the present invention, the control means supplies water from the water supply means while desorbing the urolith component ions held by the urolith component ion adsorption means when executing the desorption mode. It is also preferable to do.

  In this preferred embodiment, when the control means executes the desorption mode, water is passed from the water supply means via the urolithic component ion adsorbing means while desorbing the urolithic component ions held by the urolithic component ion adsorbing means. Drainage pipe without stagnation in the vicinity of the urolithic component ion adsorbing means while promoting the desorption of the urolithic component ions from the urolithic component ion adsorbing means by the flow of the supplied water It becomes possible to discharge from.

  Further, in the urinal according to the present invention, the control means performs pre-water supply for supplying water from the water supply means so as to reduce the pH of the waste water remaining in the drain pipe before executing the desorption mode. It is also preferable to carry out.

  Since the drain pipe is an environment that easily becomes a hotbed of bacteria, urea contained in urine (including washing water mixed with urine) remaining in the drain pipe is easily decomposed by bacteria in the drain pipe to easily generate ammonia. For this reason, the pH of drainage containing urine remaining in the drainage pipe tends to increase. In this way, water containing a large amount of urinary stone component ions retained by the urine stone component ion adsorbing means flows into the drainage pipe where drainage with a high pH is likely to remain due to execution of the desorption mode. As a result, they found a new finding that a large amount of urine may be deposited in an instant. Therefore, in the present invention, before the desorption mode is executed, the pre-water supply for supplying water from the water supply means is executed. As a result, water can flow through the drainage pipe before the desorbed urolithium ions flow into the drainage pipe, and the pH of the wastewater remaining in the drainage pipe can be lowered. Even if water containing water flows into the drainage pipe, it is possible to suppress generation of urinary stones in the drainage pipe.

  Further, in the urinal according to the present invention, the urinal is connected to a drainage horizontal branch pipe, and the control means performs the desorption mode rather than the pre-water supply when the water supply is performed. It is also preferable to reduce the flow rate of water supplied from the means.

  From the viewpoint of reducing the pH of the waste water remaining in the drain pipe, it is preferable that the flow rate of water supplied from the water supply means in the pre-cleaning is large. However, in the urinal connected to the drainage horizontal branch pipe, when the desorption mode is executed, if the flow rate of the water supplied from the water supply means is increased in the same manner as in the pre-cleaning, a large amount of urine stone component ions will be generated. The contained water vigorously flows into the drainage horizontal branch pipe, and the drainage horizontal branch pipe flows backward to the upstream side. Thus, when the backflow to the drainage side branch pipe occurs, after the water supply in the desorption mode is completed, the water containing a large amount of the backflowed urolith component ions flows down the drainage side branch pipe, It may remain in the drainage lateral branch pipe, which may cause urine to precipitate in the drainage lateral branch pipe. Therefore, in the present invention, a device has been devised so that the flow rate of water supplied from the water supply means is smaller when the desorption mode is executed than in the pre-water supply. As a result, even when the desorption mode is executed, it is possible to prevent water containing a large amount of urolithic component ions from flowing into the drainage lateral branch pipe when the desorption mode is executed. It is possible to suppress the occurrence of urinary stones when water containing ions flows back through the drainage horizontal branch pipe.

  Further, in the urinal according to the present invention, the control means is configured to suppress the water containing urine component ions that have flowed into the drainpipe by executing the desorption mode from remaining in the drainpipe. It is also preferable to execute post-water supply that supplies water from the water supply means after the end of the desorption mode.

  In this preferable aspect, after the end of the desorption mode, post-water supply for supplying water from the water supply means is executed. As a result, even after the end of the desorption mode, even if water containing urolith component ions that have flowed into the drain pipe due to the execution of the desorption mode remains in the drain pipe, the residual water Is transported downstream and the concentration of urinary stone component ions in the residual water is diluted, so that water containing a large amount of urinary stone component ions is prevented from remaining in the drain after the desorption mode is completed. Can do. Therefore, even when the desorption mode is executed, the generation of urinary stones in the drain pipe can be suppressed more reliably.

  Further, in the urinal according to the present invention, the control means sets a flow rate of water supplied from the water supply means when executing the post-water supply to a flow rate of water supplied when executing the desorption mode. Increasing the size is also preferable.

  In this preferred embodiment, the flow rate of water supplied from the water supply means when executing post-water supply is configured to be larger than the flow rate of water supplied when executing the desorption mode. As a result, when performing post-water supply, water can be supplied at a larger flow rate. Therefore, the urine stone that has remained in the drain pipe after the end of the desorption mode and has flowed into the drain pipe due to the execution of the desorption mode. Since water containing component ions can be more reliably transported downstream or diluted, the generation of urinary stones can be more reliably suppressed even when the desorption mode is executed. it can.

  Further, in the urinal according to the present invention, the desorption control in the first period in the initial stage of the desorption mode is performed after the first period so as to suppress the desorption amount in the initial period of the desorption mode. It is also preferable to change the control in the middle of the desorption mode so that the desorption performance is controlled to be less than that in the second period during the desorption mode.

  In this preferred embodiment, the detachment control in the first period at the beginning of the execution of the detachment mode in which the detachment of the urolith component ions is large and the possibility that urine is generated is high. Desorption in the second period during the desorption mode, wherein the urolithic component ions are desorbed in the first period and the urolithic component ions are less likely to be generated. In order to change the control in the middle of the desorption mode so as to control the desorption performance more than the desorption control, while suppressing the occurrence of urinary stones in the early stage of the desorption mode, which is likely to generate urine stones, In a period when urine stones are hard to occur, it can be quickly detached.

  According to the urinal of the present invention, by adsorbing and holding urinary stone component ions from urine, it is possible to reduce the burden of maintenance while suppressing the occurrence of urinary stones in the drain pipe while reducing the environmental load. Can do.

It is sectional drawing of the urinal which concerns on embodiment of this invention. It is an enlarged view of the trap part of the urinal shown in FIG. It is a flowchart which shows operation | movement of the urinal shown in FIG. It is a figure which shows the change etc. of urine stone component ion retention amount when the urinal shown in FIG. 1 operate | moves. It is the schematic which shows the mode in the trap part at the time of adsorption mode execution of the urinal shown in FIG. It is the schematic which shows the mode in the drain pipe at the time of adsorption mode execution of the urinal shown in FIG. It is the schematic which shows the mode in the trap part at the time of execution of the detachment mode etc. of the urinal shown in FIG. It is the schematic which shows the mode in the drain pipe at the time of execution of the detachment mode etc. of the urinal shown in FIG. It is a figure which shows the relationship between the value of the electric current which flows between electrodes (the value of holding current), and the amount of urine stone component ions held by the electrode.

  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 urinal body 1, a water supply unit 3, a water supply pipe 5, a spreader 7 (water supply means), a trap part TP, and a control part CR (control means). I have. The urinal body 1 and the water supply unit 3 are attached to the wall surface WL of the building frame.

  The urinal body 1 includes a bowl portion 9. The bowl portion 9 is a portion that receives the urine flow from the user of the urinal body 1. The urine flow released from the user hits the bowl wall surface 11 behind the bowl portion 9 and flows downward. The urine flow that flows downward flows from the drain port 13 opened at the bottom of the bowl portion 9 to the trap portion TP. An eye plate 15 is disposed at the drain port 13.

  The upstream side of the water supply unit 3 is connected to the building-side water supply pipe 17. The building-side water supply pipe 17 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 3. On the other hand, the downstream side of the water supply unit 3 is connected to the water supply pipe 5, and the water supply pipe 5 is further connected to the spreader 7.

  The water supply unit 3 includes an electromagnetic valve 19. The electromagnetic valve 19 is provided between the building-side water supply pipe 17 and the water supply pipe 5. When the solenoid valve 19 is closed, the water supplied from the building-side water supply pipe 17 is stopped so as not to flow into the water supply pipe 5. When the electromagnetic valve 19 is open, the water supplied from the building-side water supply pipe 17 has an instantaneous flow rate according to the opening degree of the electromagnetic valve 19 (an instantaneous flow rate when passing through a pipe line in the vicinity of the electromagnetic valve 19 (m 3 / S)) flows into the water supply pipe 5. The water flowing through the water supply pipe 5 is discharged downward along the bowl wall surface 11 from the spreader 7.

  Here, the controller CR outputs a control signal for opening and closing the electromagnetic valve 19 to a predetermined opening. Note that the urinal US in the present embodiment is not configured to supply water from the spreader 7 every time the user urinates, and to wash the bowl portion 9 or replace the urine accumulated in the trap portion TP with water. In general, the water is not supplied from the spreader 7 after the user's urination action. With such a configuration, the urinal US of the present embodiment saves water.

  The trap portion TP is disposed so as to communicate with the drain port 13 of the urinal body 1 to form the sealed water Ws. This sealed water Ws prevents the backflow of malodor from the drain pipe. The trap portion TP forms a sealed water Ws and feeds urine flowing from the drain port 13 and water supplied from the spreader 7 to the device drain pipe 21 side as drainage. The instrument drain pipe 21 (drain pipe) is disposed on the back side of the wall surface WL, and is further connected to the drain side branch pipe 27 (drain pipe) on the downstream side. (Hereinafter, the appliance drain pipe 21 and the drain side branch pipe 27 are collectively referred to as “drain pipe HK”.) Accordingly, the waste water containing urine and water sent to the instrument drain pipe 21 is sent to the drain side branch pipe 27. And flow into. As described above, the urinal US in the present embodiment is configured not to supply wash water after the user's urination, so urine that has flowed into the trap portion TP is not replaced with wash water. Therefore, the sealed water Ws in the trap part TP is formed by urine.

  The trap unit TP will be described in more detail with reference to FIG. FIG. 2 is an enlarged view of the trap portion TP. As shown in FIG. 2, the trap portion TP includes an upstream connection portion TPa (downflow channel), a downstream connection portion TPb (upflow channel), and a downstream overflow portion TPc in order from the upstream side.

  The upstream connection portion TPa is a portion connected to the drain port 13 of the bowl portion 9. The drain port 13 is connected to the upstream side, and urine and water that have flowed into the drain port 13 from the bowl portion 9 flow into the upstream connection portion TPa.

  The trap portion TP is formed to have a U shape by the upstream connection portion TPa and the downstream connection portion TPb in order to temporarily collect urine and water flowing into the drain port 13. The water that has flowed in from the upstream connection portion TPa is configured to accumulate below the lower inner wall surface of the downstream overflow portion TPc. Therefore, the sealing water Ws is formed by the upstream sealing water Wsu that accumulates in the upstream connection portion TPa and the downstream sealing water Wsd that accumulates in the downstream connection portion TPb. In the present embodiment, a U-shaped trap is employed as the trap portion TP. However, it is also preferable to employ another form of trap as long as the above-described function is achieved, such as a belt wrap.

In addition, the trap part TP removes urinary stone component ions from the urine in the trap TP by adsorbing ions (urite stone component ions) that are components of uric stones from the urine stored in the trap part TP. An adsorbing means 25 (urine stone component ion adsorbing means) having a function to perform is arranged. Examples of ions that are components of urine stones include calcium ions (Ca ²⁺ ), magnesium ions (Mg ²⁺ ), and phosphate ions (PO ₄ ³⁻ ).

  Since the urinal US in the present embodiment is provided with such an adsorbing means 25, before the urine that has flowed into the trap portion TP flows into the drain pipe HK, ions that are components of urinary stones are removed from the urine. it can. Therefore, since the urine stone component ion concentration of the urine flowing into the drain pipe HK and remaining in the drain pipe HK can be extremely reduced, it is possible to prevent urinary stones from being generated in the drain pipe HK.

  The adsorbing means 25 in the present embodiment includes a pair of electrodes 25a and 25b, and these electrodes 25a and 25b are soaked in urine stored in the trap part TP. Then, by continuously applying a voltage to the electrodes 25a and 25b, urine stone component ions are attracted to the electrode having the opposite charge by electrostatic attraction, and this attracted state is maintained, so that Removes urinary stone ions.

  As described above, the controller CR outputs a control signal for opening and closing the electromagnetic valve 19 to a predetermined opening. In addition, the control unit CR outputs a control signal so as to apply a predetermined voltage to the electrodes 25a and 25b.

  Here, the controller CR is configured to be able to execute “adsorption mode” and “desorption mode”. In the “adsorption mode”, a predetermined voltage V1 is continuously applied to the electrodes 25a and 25b to adsorb the urinary stone component ions in the urine to the electrodes 25a and 25b, and the adsorbed urine is maintained. In this mode, the urinary stone component ions are removed from the urine stored in the trap portion TP by holding the stone component ions. On the other hand, in the “desorption mode”, a predetermined voltage V2 (reverse voltage of the voltage V1) is applied to the electrodes 25a and 25b, and the urine stone component ions adsorbed and held in the “adsorption mode” are supplied from the spreader 7. In this mode, the cleaning water flowing into the drain pipe HK via the electrodes 25a and 25b is contained and discharged from the drain pipe HK. As described above, by enabling not only the “adsorption mode” but also the “desorption mode”, the amount of retained urolith component ions is the highest of the urolith component ions that can be retained by the adsorption means 25. Even when a large amount of Nm is reached, it is possible to regenerate the urine stone component ions so that they can be adsorbed and retained again, so that it is not necessary to replace the adsorbing means 25 and the adsorbing means 25 is used for a long period of time. Can do.

Subsequently, the operation of the control unit CR when adsorbing and desorbing urolith component ions, and the state in the trap unit TP and the state in the drain pipe HK during this operation will be described with reference to FIGS. While explaining. FIG. 3 is a flowchart showing the operation of the urinal US of the present embodiment. FIG. 4 is a graph showing the movement of the electromagnetic valve 19 when the urinal US is operated in the flowchart shown in FIG. It is. FIG. 5 and FIG. 6 are schematic views showing a state in the trap part TP and a state in the drain pipe HK when the adsorption mode is executed. FIG. 7 and FIG. 8 are schematic views showing a state in the trap part TP and a state in the drain pipe HK, respectively, at the time of execution of the desorption mode or the like. 5 to 8, for the sake of simplification, only calcium ions (Ca ²⁺ ) and magnesium ions (Mg ²⁺ ) are shown as urine stone component ions, but in reality, phosphate ions (PO ₄ ^3- ) and other urine stone ions are adsorbed and retained.

  In FIG. 3, in step S <b> 11, the “adsorption mode” is executed to start adsorption and retention of urine stone component ions. Specifically, the voltage V1 is continuously applied to the electrodes 25a and 25b so that urine stone component ions can be adsorbed and held at any time. Therefore, when there is a urination action by the user, urinary stone component ions can be adsorbed and retained from the urine. Subsequently, in step S12, it is determined whether or not the urine stone component ion retention amount of the electrodes 25a and 25b has reached the maximum amount Nm that can be retained by the electrodes 25a and 25b. Specifically, in the urinal US of the present embodiment, the current flowing between the electrodes 25a and 25b (current output from a power source that applies a voltage between the electrodes 25a and 25b to the control unit CR. A value of “holding current” is also inputted. Since the holding current changes according to the amount of urine stone component ions held in the electrodes 25a and 25b, the urine stone component ion holding amount of the electrodes 25a and 25b is set to the maximum amount Nm based on the value of the holding current. It is determined whether or not it has been reached. More specifically, as shown in FIG. 9, there is an inverse relationship between the holding current value and the urine stone component holding amount of the electrodes 25a and 25b, and the holding current is a predetermined lower limit current value. When Ib is reached, there is a characteristic that the amount of retained urinary stone component ions cannot be increased any more. Therefore, depending on whether the retained current has reached the lower limit current value Ib, the urinary stone component ions of the electrodes 25a and 25b are determined. It is determined whether the holding amount has reached the maximum holding amount Nm. Therefore, until it is determined in step S12 that the retained amount of urolithic component ions has reached the maximum amount Nm, the electrodes 25a and 25b adsorb urolithic component ions from the urine discharged from the user, The holding operation can be repeated.

Here, the state in the trap part TP and the drain pipe HK when the “adsorption mode” is executed will be described. FIG. 5A shows a state after several users urinate after executing the “adsorption mode”. Urine discharged by the user is stored in the trap portion TP, but urine stone component ions (Ca ²⁺ , Mg ²⁺ ) contained in the urine have already been adsorbed and held on the electrode 25a, and the trap The urinary component ion concentration of the urine Url stored in the TP is very low or does not contain urinary component ions. As shown in FIG. 5B, when urination is performed by a new user, urine Urp discharged by the user flows into the trap portion TP. As a result of this flow, the stored urine Url is discharged to the drain pipe HK as shown in FIG. 6A. However, the urine Url has a very low urinary stone component ion concentration or contains urolithic component ions. Therefore, as shown in FIG. 6 (B), urine Url remains in the drainage pipe HK, and even if the pH of the residual urine Url increases due to the action of bacteria and the like in the drainage pipe HK, Precipitation can be suppressed. Further, as shown in FIG. 5B, urine stone component ions contained in the urine Urp flowing into the trap portion TP are adsorbed to the electrode 25a. Therefore, even if new urine Urp flows into the trap portion TP, as shown in FIG. 5C, the urine has a very low urinary component ion concentration or does not contain urolith component ions. The state is stored in the trap part TP.

  Returning to FIG. 3, when it is determined in step S12 that the retained amount has reached the maximum amount Nm, the flow proceeds to step S13, and the supply of washing water from the spreader 7 is started (pre-watering). At this time, as shown in FIG. 4C, the controller CR fully opens the opening of the solenoid valve 19 and outputs a control signal so that the wash water is supplied at a large flow rate (instantaneous flow rate: large) ( t1). In step S14, it is determined whether or not a predetermined time Ta has elapsed since the start of the supply of cleaning water. If the predetermined time Ta has not elapsed, step S14 is repeatedly executed. If it is determined that the predetermined time Ta has elapsed, the process proceeds to step S15.

  The state in the trap part TP and the drain pipe HK at this time is demonstrated. FIG. 7A shows a state in which the holding amount reaches the maximum amount Nm in step S12. At this time, as shown in FIG. 8A, urine Url whose pH is increased by the action of bacteria or the like remains in the drain pipe HK. FIG. 7B shows a state when the supply of cleaning water is started in step S13. The washing water supplied from the spreader 7 flows into the trap part TP, and the urine Url stored in the trap part TP is discharged to the drain pipe HK by this inflow. Accordingly, as shown in FIG. 7B, only the cleaning water Wfl is stored in the trap portion TP. Since the supply of the cleaning water is continued for a predetermined time Ta, the cleaning water once stored in the trap section TP is continuously discharged to the drain pipe HK by the cleaning water flowing into the trap section TP one after another. As a result, as shown in FIG. 8B, the urine Url having a high pH remaining in the drain pipe HK is washed away or diluted by the washing water Wfl. In the present embodiment, the predetermined time Ta is set such that the urine Url having a high pH remaining in the drain pipe HK can be sufficiently washed away. In addition, since a voltage is continuously applied to the electrodes 25a and 25b and urine stone component ions are held, the adsorbed urine stone component ions are discharged to the drain pipe HK by supplying the washing water. There is no.

  Returning to FIG. 3, when the process proceeds to step S <b> 15, the supply flow rate of the cleaning water supplied from the spreader 7 is changed. At this time, as shown in FIG. 4C, the opening degree of the electromagnetic valve 19 is half-opened, and a control signal is output so that the cleaning water is supplied at a small flow rate (instantaneous flow rate: small) (t2). Subsequently, the process proceeds to step S16, the adsorption mode is terminated, and the process proceeds to step S17 to start desorption processing of urolith component ions. At this time, as shown in FIG. 4B, a control signal is output so that the voltage applied to the electrodes 25a and 25b is changed from V1 to V2 (the reverse voltage of V1) (t2). In step S18, it is determined whether or not a predetermined time Tb has elapsed since the start of the desorption process. If it has not elapsed, step S18 is repeatedly executed, and if it is determined that it has elapsed, the process proceeds to step S19, and the desorption process is terminated. When the desorption process is completed, as shown in FIG. 4B, a control signal is output so that no voltage is applied (t3). Then, the process proceeds to step S20, and the cleaning water supply flow rate is changed from a small flow rate to a large flow rate (instantaneous flow rate: high) again (post-water supply). At this time, as shown in FIG. 4C, a control signal is output so that the solenoid valve 19 is fully opened (t3). And it transfers to step S21 and it is determined whether predetermined time Tc passed after changing the washing water supply flow volume from the small flow volume to the large flow volume. If the predetermined time Tc has not elapsed, step S21 is repeatedly executed. If it is determined that the time has elapsed, the process proceeds to step S22, and the supply of the washing water is stopped. At this time, as shown in FIG. 4C, a control signal is output so that the solenoid valve 19 is fully closed (t4). Then, after supplying the washing water in step S22, the process returns to step S11, and the adsorption mode is executed again so that urine stone component ions can be adsorbed from new urine discharged from the user. .

From here, the state in the trap part TP and the drain pipe HK after step S15 is demonstrated. FIG. 7C shows a state in the trap portion TP when the cleaning water supply flow rate is reduced and the desorption process is started in step S15 and step S17. As shown in FIG. 7C, the voltage V2 (reverse voltage of V1) is applied to the electrodes 25a and 25b by the desorption treatment, and the electrode 25a serving as the anode is urite component ions (Ca ²⁺ , Mg ²⁺ ). Therefore, a large amount of urinary component ions flow downstream from the electrode 25a together with the washing water Wfl flowing into the trap portion TP. Therefore, as shown in FIG. 8 (C), the wash water Wfh containing a large amount of urolith component ions is discharged to the drain pipe HK. At this time, if urine having a high pH remains in the drain pipe HK, the wash water Wfh having a very high urine stone component ion concentration comes into contact with the urine having a high pH, and a large amount of urinary stones are instantaneously placed in the drain pipe HK. Will be deposited. However, in the present embodiment, before the cleaning water Wfh having a very high urine stone component ion concentration is discharged to the drain pipe HK, the pH remaining in the drain pipe HK is supplied to the drain pipe HK. However, since a high urine is conveyed downstream or diluted to lower the pH, such a large amount of urine is not deposited.

  In addition, since the cleaning water is supplied at a small flow rate, the cleaning water Wfh having a very high concentration of urine stone component ions does not flow backward to the upstream side of the branch portion 27a of the drainage lateral branch pipe 27. It is possible to prevent urinary stones from being generated by remaining upstream of the branch portion 27a.

  In the present embodiment, after the start of the desorption process, at a timing when all the urine stone component ions adsorbed on the electrode 25a are discharged to the drainage lateral branch pipe 27, a predetermined amount is set so that the supply amount of washing water is changed to a large flow rate. Time Tb is set. Accordingly, at the timing when all of the washing water Wfh having a very high urine stone component ion concentration is discharged to the drainage lateral branch pipe 27, as shown in FIG. 7D, the washing water again enters the trap portion TP at a large flow rate. Inflow. As a result, as shown in FIG. 8D, the washing water Wfl flows into the drain pipe HK vigorously, and the washing water Wfh having a very high urine stone component ion concentration is reliably prevented from remaining in the drain pipe HK. It is possible to prevent generation of urinary stones in the drain pipe HK due to the remaining cleaning water Wfh. In the present embodiment, the predetermined time Tc is set so that the wash water Wfh having an extremely high urine stone component ion concentration is sufficiently discharged from the drain pipe HK.

  In this embodiment, urine stones are prevented from being generated in the drain pipe HK by discharging the adsorbed urolith component ions from the drain pipe HK.

  In the desorption process performed in steps S17 to S18, the desorption control in the first period at the beginning of the desorption mode in which a large amount of desorbed urolith component ions are likely to generate urine is the first. The second period in the desorption mode that is less than the period of, and is less likely to generate urolith due to the desorption of urolith component ions in the first period It is also preferable to change the control in the middle of the desorption mode so that the desorption performance is controlled more than in the desorption control.

  According to such an aspect, it is possible to quickly detach during the period in which urinary stones are difficult to generate while suppressing the occurrence of urinary stones at the initial stage of execution of the detachment mode in which urine stones are easily generated.

  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, in the above-described embodiment, electrostatic attraction is used to hold urine stone component ions adsorbed by the adsorbing means, but the present invention is not limited to this. For example, intermolecular force Alternatively, the adsorbed uricite component ions may be retained using physical force.

US: Urinal WL: Wall surface CR: Control unit 1: Urinal body 3: Water supply unit 5: Water supply pipe 7: Spreader (water supply means)
9: Bowl part 11: Bowl wall surface 13: Drain port 15: Eye plate 17: Construction side water supply pipe 19: Solenoid valve 21: Appliance drain pipe (drain pipe)
25: Adsorption means (urine stone component ion adsorption means)
25a: Electrode 25b: Electrode 27: Drainage horizontal pipe (drainage pipe)
27a: Branching part TP: Trap part TPa: Upstream connecting part (downward flow path)
TPb: Downstream connection (ascending flow path)
TPc: Downstream overflow portion Ws: Sealed water Wsu: Upstream sealed water Wsd: Downstream sealed water Url: Urine (urine from which urinary stone factor ions have been removed)
Urp: urine (urine without removal of urinary stone factor ions)
Wfl: Washing water (washing water not containing desorbed urolith component ions)
Wfh: Washing water (washing water having a high concentration of urinary stone component ions containing desorbed urolithic component ions)
HK: Drain pipe

Claims (5)

A urinal connected to a drain pipe,
A bowl that receives urine,
A drain opening that opens at the bottom of the bowl portion and communicates with the drain pipe;
Further, urine stone component ions contained in the urine before the urine received by the bowl portion flows into the drain pipe so that the urine stone component ions, which are components of urine stone, can be prevented from flowing into the drain pipe. And adsorbing means by electrostatic attraction, and urine stone component ion adsorption means for holding adsorbed urolith component ions,
A water supply means for supplying water so as to flow into the drain pipe via the urine stone component ion adsorption means;
Control means for controlling the urine stone component ion adsorption means and the water supply means,
The control means includes
An adsorption mode for adsorbing urinary stone component ions from urine by the urolithic component ion adsorption means;
A desorption mode in which the urolithic component ions held by the urolithic component ion adsorbing means are desorbed, and the dehydrated urolithic component ions are discharged from the drain pipe by supplying water from the water supply unit; Is possible and
Before performing the desorption mode, performing pre-water supply for supplying water from the water supply means so as to reduce the pH of the waste water remaining in the drain pipe,
The urinal is characterized in that when the desorption mode is executed, water is supplied from the water supply means while desorbing urine stone component ions held by the urolith component ion adsorption means . The urinal is connected to a drainage horizontal branch pipe,
2. The urinal according to claim 1 , wherein the control unit makes the flow rate of water supplied from the water supply unit smaller than the pre-water supply when the desorption mode is executed. The control means, after the end of the desorption mode, the water supply means so as to suppress water containing urine stone component ions that have flowed into the drain pipe due to execution of the desorption mode from remaining in the drain pipe. The urinal according to claim 1 , wherein post-water supply for supplying water is performed. The control means according to claim 3, wherein the flow rate of water supplied from the water supply means, to be greater than the flow rate of water supplied in performing the desorption mode when executing the post water Urinal as described in. In order to suppress the desorption amount at the initial stage of the desorption mode, the desorption control in the first period at the initial stage of the desorption mode is performed in a period after the first period and in the desorption mode. so that a control with reduced separation performance than elimination control in the second period, characterized in that said changing the middle control desorption mode, according to any one of claims 1 to 4 Urinals.

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