JP6993609B2 - urinal - Google Patents

Description

The present invention relates to a urinal, and more particularly to a urinal that cleans the bowl surface with spouted wash water.

Conventionally, as described in Patent Document 1, a urinal that detects the approach of a person to a urinal by a human body detection sensor and discharges water to the extent that the inner surface of the toilet bowl is wet has been known. In such a urinal, since the washing water continues to flow into the toilet bowl while urinating a person, it is possible to prevent dirt from adhering to the inner surface of the toilet bowl.

Japanese Unexamined Patent Publication No. 63-22931

However, in the conventional urinal described in Patent Document 1 described above, the washing water is discharged into the toilet bowl triggered by the detection of the user by the human body detection sensor. Therefore, since the water is discharged even when the user does not urinate, there is a problem that the water is wasted for the purpose of diluting the urine.

Until now, it has been considered that the urinal trap and the urinary stone formed in the horizontal pipe on the downstream side of the drain trap are generated by the activity of bacteria in a relatively long cycle of about 2 hours. ..
However, as a result of diligent research, the present inventors have found a new finding that urinary stones are generated even in a very short time of about several seconds in an environment where a biofilm is formed.

Based on these findings, when a biofilm is formed in a drain trap, urine stones are generated and adhered within a few seconds even if the urine concentration temporarily increases during urination. I understood. Further, since the same phenomenon occurs in the horizontal pulling pipe, urine stones are generated and adhered even when the washing water having a relatively high urine concentration flows into the horizontal pulling pipe.

On the other hand, the present inventors kept the urine concentration in the drain trap relatively low because the flow rate of urine was relatively low at the initial stage of urination of the user and the previous wash water was stored in the drain trap. We also found the findings.

Therefore, the present invention has been made to solve the above-mentioned problems and problems of the prior art, and can keep the urine concentration in the drain trap relatively low, suppress the generation of urine stones, and contribute to the dilution of urine. It is intended to provide a urinal that can suppress the discharge of difficult-to-difficult wash water and save the wash water that dilutes urine.

In order to achieve the above object, the present invention is a urinal that cleans the bowl surface with spouted wash water, and has a bowl portion that forms a bowl surface that receives urine and forms a drain port at the bottom thereof. A drain trap that communicates with the drain port of the bowl portion, a water discharge portion that discharges wash water to the bowl surface of the bowl portion, a human body detection sensor that detects a user standing in front of the bowl portion, and the above. The control unit includes a control unit that controls the discharge of wash water by the water discharge unit, and the control unit has a first water discharge mode in which water is discharged from the water discharge unit while the human body detection sensor is detecting a user, and the control unit. Between the second water discharge mode in which water is discharged from the water discharge unit after the human body detection sensor stops detecting the user, and the time between the detection of the user by the human body detection sensor and the execution of the first water discharge mode. In the standby mode in which the standby mode waits for a predetermined standby time, the execution of the first water discharge mode is started after the standby time of the standby mode elapses, and the standby mode and the detection state of the user by the human body detection sensor are The non-use mode in which neither the first water discharge mode nor the second water discharge mode is executed and the detection state by the human body detection sensor are described when the operation is completed in a time shorter than the standby time and the usage confirmation time set. It is characterized by having a forced cleaning mode for executing the second water discharge mode when the forced cleaning time is longer than the confirmed use time and shorter than the standby time .
In the present invention configured as described above, even if urination is started while waiting in the standby mode, the urine concentration in the drain trap at the initial stage of urination can be kept relatively low and the generation of urinary stones can be suppressed. By executing the first water discharge mode after the standby mode, the urine concentration in the drain trap can be reduced and the generation of urine stones can be suppressed. Therefore, according to the present invention, the standby mode can suppress the discharge of wash water that does not easily contribute to the dilution of urine, and can save the wash water that dilutes urine. Further, according to the present invention, by executing the standby mode, the start of execution of the first water discharge mode is made to wait for a predetermined waiting time while the user standing in front of the bowl portion prepares for urination, and the urine is discharged. It is possible to suppress the discharge of wash water, which is difficult to contribute to dilution, and save the wash water that dilutes urine.
Further, in the present invention configured as described above, when the detection state of the user by the human body detection sensor ends in a time shorter than the set usage confirmation time shorter than the standby time, the control unit causes the user to urinate. Judge that it is highly possible that you did not do it, and execute the unused mode. Therefore, according to the present invention, when it is assumed that the user is not using the urinal, it is possible to suppress the discharge of the washing water that dilutes the urine and save the washing water.
Further, in the present invention configured as described above, when the detection state by the human body detection sensor ends within the forced cleaning time longer than the usage confirmation time and shorter than the standby time, the control unit does not execute the first water discharge mode. Therefore, if the user is urinating, the urine may not be diluted and the bowl and the drain trap may not be washed. Therefore, according to the present invention, the control unit determines that the user may be urinating, and executes the second water discharge mode by the forced washing mode to surely dilute the urine and the bowl portion and the drain trap. Can be washed.

According to the urinal of the present invention, the urine concentration in the drain trap can be kept relatively low and the generation of urine stones can be suppressed, and the washing water that hardly contributes to the dilution of urine is suppressed and the washing water that dilutes the urine is suppressed. Can be saved.

A part of the drain trap pipeline of the urinal before the user urinates is enlarged and shown, and urinary stones are generated even in a very short time in an environment where organic matter containing biofilm is formed. It is a figure explaining a new finding. After the user urinates, it shows that the drain trap pipeline is filled with urine until the urinal is washed, and it is very short in an environment where organic stains including biofilm are formed. It is a figure explaining a new finding that a urinary stone occurs even in time. Even in a very short time in an environment where the main cleaning operation of the urinal is performed and the urine in the drain trap pipeline is replaced with new cleaning water and organic stains including biofilm are formed. It is a figure explaining the new finding that the urinal stone occurs. After urinating by the user, the drain trap pipeline shown in FIG. 1A is almost filled with wash water having a relatively high urine concentration, and the degree is the same in an environment where organic stains including biofilm are formed. It is a figure explaining the new finding that the difference in the amount of urinary stones is generated by the difference in the urine concentration of the washing water in the drain trap pipeline and the horizontal pulling pipe in the period of. The state of the drain trap pipeline shown in FIG. 2A after the main cleaning operation is performed. It is a figure explaining the new finding that the difference in the amount of urinary stones is generated by the difference in the urine concentration of the washing water in the pipe. After urinating by the user, the drain trap pipeline shown in FIG. 1A is almost filled with wash water having a relatively low urine concentration, and the degree is the same in an environment where organic stains including biofilm are formed. It is a figure explaining the new finding that the difference in the amount of urinary stones is generated by the difference in the urine concentration of the washing water in the drain trap pipeline and the horizontal pulling pipe in the period of. The state of the drain trap pipeline shown in FIG. 2C after the main cleaning operation is performed. It is a figure explaining the new finding that the difference in the amount of urinary stones is generated by the difference in the urine concentration of the washing water in the pipe. It is a figure which shows the thickness of the organic matter dirt with respect to the number of times of use for each urine concentration of the washing water in a drain trap pipe at the time of urination of a user. It is a figure which shows the mechanism of the generation of the organic matter contamination containing a biofilm in the drain trap pipe 14 shown in FIG. 1A. The drain trap pipeline shown in FIG. 4A is almost filled with wash water having a relatively high urine concentration. It is a figure explaining the new finding that the mechanism of the above is different and the increase in the thickness of organic stains is different. As shown in FIG. 4B, it is a figure explaining that the reaction for precipitating magnesium ammonium phosphate becomes dominant when a high pH environment is generated in the drain trap pipeline. It is a figure explaining the state that magnesium ammonium phosphate produced crystalline urinary stone with a relatively large particle size by the reaction as shown in FIG. 4C. The drain trap pipeline shown in FIG. 4A is almost filled with wash water having a relatively low urine concentration. It is a figure explaining the new finding that the mechanism of the above is different and the increase in the thickness of organic stains is different. It is a figure explaining that the reaction for precipitating calcium phosphate becomes dominant in the environment where the pH rise in a drain trap pipeline is suppressed to be relatively low as shown in FIG. 4E. It is a figure explaining the state which calcium phosphate produced amorphous urinary stone with a relatively small particle size by the reaction as shown in FIG. 4F. It is a figure which shows the state that the urinal is connected to the horizontal pulling pipe provided on the back side of the wall surface in the state which a plurality of urinals by one Embodiment of this invention are installed. It is a perspective view of the urinal according to one Embodiment of this invention. It is a front view of the urinal according to one Embodiment of this invention. It is sectional drawing seen along the line VIII-VIII of FIG. It is a top view of the urinal according to one Embodiment of this invention. It is a figure which shows the structure of the automatic cleaning unit of the urinal by one Embodiment of this invention. It is sectional drawing seen along the XI-XI line of FIG. It is sectional drawing seen along the XII-XII line of FIG. It is sectional drawing seen along the XIII-XIII line of FIG. It is sectional drawing seen along the XIV-XIV line of FIG. It is an exploded perspective view of the spreader of the urinal by one Embodiment of this invention. It is a side sectional view of the spreader of the urinal by one Embodiment of this invention. It is a flowchart which shows the control operation of the controller for every use times that a user uses this urinal in the urinal by one Embodiment of this invention. In the urinal according to one embodiment of the present invention, it is a timing chart which shows the state of the detection sensor, the state of use of a user, and the control operation of a controller for each use of this urinal. It is a figure which shows the change of the urine concentration in the washing water in the drain trap pipeline with respect to the time after the detection sensor detects a user in the urinal by one Embodiment of this invention. 20 (a) to 20 (l) are diagrams showing the water flow shape of the water discharge in the urine dilution water discharge mode by the spreader of the urinal according to the embodiment of the present invention for each instantaneous flow rate of the water discharge. When the instantaneous flow rate of water discharged by the urine dilution water discharge mode in the urinal according to the embodiment of the present invention is 0.3 [liter / min], the contour of the water flow is taken on a photograph of the water flow shape formed by the water discharge. It is a figure which shows. When the instantaneous flow rate of water discharged by the urine dilution water discharge mode in the urinal according to the embodiment of the present invention is 0.5 [liter / min], the contour of the water flow is taken on a photograph of the water flow shape formed by the water discharge. It is a figure which shows. When the instantaneous flow rate of water discharged by the urine dilution water discharge mode in the urinal according to the embodiment of the present invention is 0.7 [liter / min], the contour of the water flow is taken on a photograph of the water flow shape formed by the water discharge. It is a figure which shows. It is a flowchart which shows the control operation of the controller which executes the organic matter dirt suppression water discharge mode in the urinal by one Embodiment of this invention. It is a figure explaining the relationship between the integrated amount Wv of the amount of water spouted by the urine dilution spouting mode, and the amount of water spouting by this organic matter contamination suppression spouting mode in the urinal according to one Embodiment of this invention. In the drain trap pipeline when the instantaneous flow rate of water discharged by the urine-diluted water discharge mode in the urinal according to the embodiment of the present invention changes within the range of 0 [liter / minute] to 1.39 [liter / minute]. It is a figure which shows the urine concentration of the washing water of the above, and the observation image of the organic matter dirt adhering on the slide glass arranged simulating the drain trap pipeline. When the instantaneous flow rate of water discharged by the urine-diluted water discharge mode in the urinal according to the embodiment of the present invention changes within the range of 1.40 [liter / minute] to 8.0 [liter / minute], the drain trap pipe It is a figure which shows the urine concentration of the washing water in a passage, and the observation image of the organic matter dirt adhering on the slide glass arranged simulating the drain trap pipeline. It is a figure which shows the relationship between the instantaneous flow rate which water is discharged by the urine dilution water discharge mode in the urinal in one Embodiment of this invention, and the thickness of the attached organic matter dirt. It is a figure which shows the relationship between the urine concentration of the washing water in a drain trap pipe, and the thickness of the adhering organic matter dirt in the urinal in one Embodiment of this invention. In the urinal according to the embodiment of the present invention, the relationship between the instantaneous flow rate of water discharged in the urine-diluted water discharge mode and the urine concentration of the washing water in the drain trap pipe is examined in the water-saving drain trap pipe and the conventional drain. It is a figure which shows the trap pipeline. In the urinal according to the embodiment of the present invention, the relationship between the instantaneous flow rate of water discharged in the urine-diluted water discharge mode and the urine concentration of the washing water in the drain trap pipe is examined in a region where the instantaneous flow rate of water discharge is low. It is a figure which shows the drain trap pipeline and the conventional drain trap pipeline. 30 (a) to 30 (d) show the washing remaining in the horizontal pulling pipe after the user urinates and the main washing water discharge mode is performed in the urinal in which the urine dilution water discharge mode of the comparative example is not performed. It is a figure explaining the state of water. In FIGS. 31 (a) to 31 (d), in the urinal according to the embodiment of the present invention, the urine diluting water discharge mode is executed when the user urinates, and the main wash water discharge mode is performed after urination, and then the main wash water discharge mode is performed. It is a figure explaining the state of the washing water remaining in a horizontal pulling pipe.

<Newly discovered urinary stone generation mechanism>
Through diligent research, the present inventors have found the following new findings that urinary stones are generated even in a very short time in an environment where organic stains including biofilms are formed.

Conventionally, the mechanism of urinary stone generation focusing on inorganic stains such as urinary stone has been known as follows. In this mechanism, urination accumulates in the drain trap line and the horizontal pulling pipe after the user's urinal is used, and general bacteria adhere to the accumulated urine. In the metabolic process of this general bacterium, an enzyme called urease is excreted. Urea in urine is decomposed by this urease enzyme to generate ammonia. When ammonia becomes water-soluble, the pH in the liquid containing urine rises and becomes alkaline. In a relatively high environment where the pH exceeds 8.0 to 8.5, the solubility of Ca and Mg carbonates and phosphates contained in urine decreases, so these salts are contained in the urine. Precipitates and adheres to drain trap pipelines and horizontal pipes as urine stones. It has been considered that the generation of urinary stones with such inorganic stains progresses relatively slowly over a relatively long period of 2 hours or more.

On the other hand, the present inventors have newly focused on organic stains different from inorganic stains among the stains generated in the drain trap pipeline and the horizontal pipe, and in an environment where organic stains including biofilm are formed. It was found that urinary stones are generated even in a very short time of about several seconds.

As shown in FIGS. 1A to 1C, the mechanism of generation of urinary stone U in a short time focuses on the organic matter stain V including the biofilm, and is explained as follows.
The organic matter stain V is formed by combining a biofilm centered on EPS (Exopolysaccharide: Extracellular Poly Succharide) released in the process of growth of bacteria X such as general bacteria, and proteins contained in urine. .. Such organic dirt V is known as slime in the pipe and forms a very viscous mucus. In such a biofilm of organic matter stain V, bacteria X adhering to the drain trap pipe line 14 and the horizontal pipe 3 and the like form a polysaccharide polymer outside the cells, and the cells are detached by being wrapped in the polymer. It is believed that it will be suppressed and will develop.

In FIG. 1A, a part of the drain trap line 14 of the urinal before the user urinates into the urinal is shown in an enlarged manner. The drain trap pipeline 14 shown in FIG. 1A is in a state after the user has continued to use the urinal 1 many times. The drain trap pipeline 14 stores the wash water discharged by the previous main wash discharge mode. Hereinafter, the states and reactions in the drain trap line 14 are described in FIGS. 1A to 4G, but the state and reaction in the equipment pipe on the downstream side of the drain trap line 14 such as the horizontal pull pipe 3 are also described. It is almost the same, and is also applied to the horizontal pulling pipe 3 and the like.

If a biofilm of organic contamination V is formed in the drain trap line 14 after the user has used the urinal 1, bacteria X generate and develop this biofilm. The biofilm forms a sponge-like internal structure, which facilitates the retention of bacteria X and ammonia (or ammonium ion NH ₄₊ ⁾ inside. Bacteria X excrete urease enzyme, which decomposes urea in urine to generate ammonia (or ammonium ion NH ₄₊ ⁾ . Therefore, a large amount of ammonia (or ammonium ion NH ₄₊ ⁾ is present in the region near the biofilm. Ammonia is dissolved in the liquid in the vicinity of the organic stain V to generate ammonium ^ion NH ₄₊ , so that the pH in the region in the vicinity of the organic stain V rises to a relatively high value. The pH of the high pH environment region Y in the vicinity of the organic matter stain V containing the biofilm is 8 or more, preferably 9 or more, preferably a value in the range of 8 to 10.

In FIG. 1B, in a urinal having a drain trap pipeline 14 in the state shown in FIG. 1A, a drain trap is performed in a relatively short period of time until the user urinates and the urinal is cleaned. It shows a state in which the inside of the conduit 14 is almost filled with urine. When this urine touches or approaches the high pH environment region Y in the vicinity of the organic matter stain V, carbonates, phosphates, etc. of Ca and Mg contained in the urine are precipitated, and it takes a very short time of about several seconds. A mechanism was found in which urinary stone U was generated.

In FIG. 1C, from the state where the inside of the drain trap pipe 14 as shown in FIG. 1B is almost filled with urine, after the urinal cleaning operation is performed, the urine in the drain trap pipe 14 is fresh. It shows the state of being replaced with wash water. Although the urine in the drain trap pipeline 14 is replaced with fresh washing water, the precipitated urine stone U remains adsorbed by the organic matter stain V. Since the biofilm forms a sponge-like internal structure, urinary stone U is also easily retained. It was also found that when the urinary stone U is attached in this way, the bacterium X is more likely to be attached to the urinary stone U itself, and the generation of the urinary stone U is further promoted. In this way, it was found that urinary stones were deposited on the organic matter stain V in a short time and the urinary stones U were laminated by accumulating short-time washings each time.

Based on such new findings, the present inventors suppressed the operation of the mechanism for generating urinary stones in a relatively short time when the washing water containing urine comes into contact with the biofilm, and the drain trap pipeline 14 And a technique for suppressing the generation of urinary stones in the horizontal pulling pipe 3 was invented.

Furthermore, the present inventors have conducted diligent research, and in an environment where organic stains including biofilms are formed, urine of the washing water in the drain trap pipe 14 and the horizontal pipe for the same period. We found the following new findings that the amount of urinary stones generated differs depending on the concentration.

In FIG. 2A, in a urinal having a drain trap pipe 14 as shown in FIG. 1A, the drain trap pipe is used in a relatively short period of time until the user urinates and the urinal is washed. It shows a state in which the inside of 14 is almost filled with the washing water having a relatively high urine concentration. When the washing water having a relatively high urine concentration touches or approaches the high pH environment region Y in the vicinity of the organic matter stain V, a relatively large amount of urinary stone U is generated in a very short time of about several seconds.

As shown in FIG. 2B, the urinal stone U generated in a relatively large amount is organically contaminated even after the urinal cleaning operation is performed and the cleaning water in the drain trap line 14 is replaced with new cleaning water. It remains in the state of being adsorbed on.
As shown in FIG. 3, when the user urinates, the washing water having a relatively high urine concentration flows into the drain trap pipe line 14 repeatedly every time the urinal is used. A large amount of generated urinary stone U accumulates on the drain trap pipeline 14, and makes the thickness of the organic dirt V relatively large.

On the other hand, in FIG. 2C, in the urinal having the drain trap pipeline 14 as shown in FIG. 1A, the drain trap is performed in a relatively short time until the user urinates and the urinal is washed. It shows a state in which the inside of the pipe line 14 is almost filled with the washing water having a relatively low urine concentration. When the washing water having a relatively low urine concentration touches or approaches the high pH environment region Y in the vicinity of the organic matter stain V, a relatively small amount of urine stone U is generated in a very short time of about several seconds. In this way, the amount of urinary stone U generated depends on the urine concentration of the washing water in the drain trap pipe 14 in the same time each time after the user urinates until the urinal washing operation is performed. Findings were found. Therefore, it was also found that the amount of urinary stone U deposited can be suppressed if the urine concentration of the washing water in the drain trap pipeline 14 can be reduced.

As shown in FIG. 2D, the urinary stone U generated in a relatively small amount also remains adsorbed by the organic matter stain V after the urinal cleaning operation is performed.
As shown in FIG. 3, when the user urinates, the washing water having a relatively low urine concentration flows into the drain trap line 14 repeatedly when the urinal is used, which is relatively low. Since a small amount of urinary stone U accumulates on the drain trap pipeline 14, the thickness of the organic dirt V can be suppressed. It was also found that the difference in the urine concentration of the washing water in the drain trap pipeline 14 at the time of urination of each user becomes a larger difference in the thickness of the organic matter stain V as the number of times of use increases.

Furthermore, the present inventors have conducted diligent research, and as a result, the mechanism of generation of urinary stones differs due to the difference in the urine concentration of the washing water in the drain trap pipeline 14 and the horizontal pipe, and the thickness of the organic stain V increases. We found the following findings that there is a difference in urine.

In FIG. 4A, the mechanism of generation of organic matter contamination V including biofilm in the drain trap pipeline 14 and the horizontal pulling pipe 3 as shown in FIG. 1A described above is schematically shown again. As shown in step (a) in FIG. 4A, the user's urine adheres to the drain trap pipe 14, and the bacterium X adheres to the urine and proliferates on the drain trap pipe 14. With the passage of time and / or the increase in the number of times the urinal 1 is used, the process proceeds from step (a) to step (b) in FIG. 4A.

As shown in step (b) in FIG. 4A, a biofilm of organic matter stain V is formed in the drain trap pipeline 14. Next, the process proceeds from step (b) to step (c). As shown in step (c) in FIG. 4A, the biofilm tends to retain bacteria X and ammonia (or ammonium ion NH ₄₊ ⁾ inside. Bacteria X inside the biofilm excrete urease enzyme Z, and this urease enzyme Z decomposes urea in urine to generate ammonia (or ammonium ion NH ₄₊ ⁾ . As described above, in the state before the user urinates in the urinal, a part of the drain trap pipeline 14 of the urinal is in a state where the organic matter stain V as shown in FIG. 4A (c) is formed. ing.

As shown in FIG. 4B, urea is compared when urine and / or wash water having a relatively high urine concentration flows into the drain trap conduit 14 in which the organic matter stain V is formed as shown in FIG. 4A (c). Since there is a large amount of urea in the urine, which is decomposed by urease enzyme Z, a relatively large amount of urea is generated and a relatively large amount of ammonia is generated. When these ammonia are water-soluble, ammonium ^ion NH ₄₊ is generated, and the pH in the region near the organic matter stain V rises to a relatively high value.

As shown in FIG. 4C, in a high pH environment as shown in FIG. 4B, inorganic substances in a liquid containing urine, such as Ca ²⁺ , Mg ²⁺ , NH ₄₊ , PO ₄ ^3- , etc., react with ammonia ^. Then, the reaction for precipitating magnesium ammonium phosphate becomes dominant. Magnesium ammonium phosphate is a urinary stone component that is easily produced from urine in an alkaline environment.

As shown in FIG. 4D, magnesium ammonium phosphate produces crystalline urinary stones with relatively large particle sizes. FIG. 4D is an image obtained by a scanning electron microscope (SEM) and has a display magnification of 2000 times. As will be described later, this image captures the organic matter stains obtained by an experiment that reproduces the generation of the organic matter stains in the drain trap pipe line 14 and the horizontal pulling pipe 3 of the urinal 1 according to the embodiment of the present invention. It was done. When such urinary stones having a relatively large particle size are mixed in the biofilm, the thickness of the urinary stones and the thickness of the organic matter stain V are likely to increase. The thickness of the organic stain V mainly containing magnesium ammonium phosphate urinary stone is likely to be increased more than the thickness of the organic stain V containing calcium phosphate urinary stone, which will be described later. As the urine concentration of the washing water in the drain trap pipeline 14 increases, the precipitation ratio of magnesium ammonium phosphate increases, and the thickness of the organic matter stain V increases.

On the other hand, as shown in FIG. 4E, a case where urination and / or washing water having a relatively low urine concentration flows into the drain trap pipeline 14 in which the organic matter stain V as shown in FIG. 4A (c) is formed will be described. do. At this time, since the amount of urea is relatively small, the amount of urea in urine decomposed by urease enzyme Z is relatively small, and the generation of ammonia is relatively small. Therefore, the increase in pH due to the ammonium ^ion NH ₄₊ generated by the water-soluble ammonia is suppressed to be relatively low.

As shown in FIG. 4F, in an environment where the pH increase is suppressed to a relatively low level as shown in FIG. 4E, inorganic substances in a liquid containing urine, such as Ca ²⁺ , Mg ²⁺ , PO ₄ ^3- , etc. Dominate the reaction of reacting with each other to precipitate calcium phosphate. Calcium phosphate is a urinary stone component that is more likely to be produced from urine even in an environment closer to neutral than in an environment in which magnesium ammonium phosphate described above is more likely to be produced from urine.

As shown in FIG. 4G, calcium phosphate produces amorphous urinary stones with relatively small particle sizes. FIG. 4G is an image obtained by a scanning electron microscope (SEM), and the display magnification is 2003 times. As will be described later, this image captures the organic matter stains obtained by an experiment that reproduces the generation of the organic matter stains in the drain trap pipe line 14 and the horizontal pulling pipe 3 of the urinal 1 according to the embodiment of the present invention. It was done. Calcium phosphate urinary stones are smaller than magnesium ammonium phosphate urinary stones. By mixing such urinary stones having a relatively small particle size in the biofilm, the thickness of the urinary stones and the thickness of the organic matter stain V gradually increase. When urinary stone with a small particle size is the main component, the pace of increase in thickness is relatively slow, and it becomes difficult to increase the thickness. As the urine concentration in the washing water flowing into the drain trap pipeline 14 becomes lower, the precipitation ratio of calcium phosphate increases, and the thickness of the organic matter stain V becomes less likely to increase.

Based on such new findings, the present inventors adjust the urine concentration of the washing water flowing into the drain trap pipe 14, and the thickness of the urinary stone adhering to the drain trap pipe 14 and the horizontal pull pipe 3. It is the invention of the technology to suppress.

<Structure of urinal>
Hereinafter, the structure of the urinal according to the embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 5, a plurality of urinals 1 according to the embodiment of the present invention are installed side by side on the front side of the wall surface W of the building. Below the back side of the wall surface W on which the urinal 1 is installed, a horizontal drainage pipe 3 for drainage, which extends laterally while slightly descending, is connected. The horizontal pulling pipe 3 is connected to a vertical drainage pipe 5 further downstream. Each of the urinals 1 is designed to drain water from the lower wall surface side of the urinal 1 through the wall surface W to the horizontal pulling pipe 3 installed on the back side of the wall surface W.

As shown in FIGS. 5 to 8, the urinal 1 is an automatic cleaning device that automatically discharges a pottery-made toilet body 2 and washing water for cleaning the toilet body 2 to the toilet body 2. It is equipped with a unit 4.
Regarding the urinal 1 of the present embodiment, the lowermost portion of the urinal body 2 is located above the floor surface K by a predetermined distance, and the back surface of the urinal body 2 is attached along the wall surface W behind it. Although the toilet bowl will be described, it may be a floor-standing urinal in which the toilet bowl body 2 is directly arranged on the floor surface K.
Hereinafter, in the embodiment of the present invention, the floor surface K side is the lower side, the urinal 1 is sandwiched between the floor surface K and the opposite side and the upper side, and the front side of the wall surface W and the side facing the urinal 1 across the urinal 1 are the front side. When viewed from the front side, the left side is the left side and the right side is the right side.

Next, as shown in FIGS. 5 to 8, a bowl portion 6 for receiving urination is formed on the front side of the toilet bowl main body 2, and is located in the upper region of the toilet bowl main body 2 on the back side of the bowl portion 6. Is formed with a storage chamber 8 for storing a part of the automatic cleaning unit 4. Further, a drain port 10 is formed at the bottom of the bowl portion 6 of the toilet bowl main body 2. A perforated plate 12 is arranged at the drainage port 10. The toilet body 2 is further provided with a drain trap pipeline 14 which is a drain trap forming a sealing water inside the drain port 10 on the downstream side. The drain trap pipeline 14 communicates with the drain port 10. A horizontal pulling pipe 3 is connected to the downstream side of the drain trap pipeline 14 via a drain socket 15 or the like forming a flow path penetrating the wall surface W.

The drain trap pipeline 14 is formed as a water-saving trap so that the volume of the washing water stored in the drain trap pipeline 14 so as to form a sealing water is 200 ml or less. The drain trap line 14 of such a water-saving trap can replace the wash water in the drain trap line with a smaller amount of wash water than the conventional drain trap line having a volume of about 700 ml. The volume of the water-saving type drain trap pipe 14 is preferably in the range of 40 ml to 200 ml, more preferably in the range of 120 ml to 200 ml, and more preferably in the range of 120 ml. Since such a water-saving type drain trap pipe has a volume smaller than the urine volume of the user's urine, the urine concentration of the washing water in the drain trap pipe 14 tends to be high, and this urine Is effective in suppressing the adhesion of urinary stones in the drain trap pipe line 14 and the horizontal pulling pipe 3.

The drain trap pipeline 14 includes a downwardly extending descending pipeline 14a, a laterally extending folded pipeline 14b, and an upwardly extending ascending pipeline 14c. The descending pipeline 14a and the ascending pipeline 14c are separated by a common wall 14d. Since the drain trap pipeline is folded back before and after the common wall 14d, the drain trap pipeline 14 is downsized and the volume of the drain trap pipeline 14 is also reduced. In the central cross section shown in FIG. 8, the width 14e in the front-rear direction of the lower end of the descending pipe 14a and the width 14f in the front-back direction of the lower end of the rising pipe 14c are formed to have substantially the same width, and the drain trap pipe 14 Is miniaturized in the front-back direction. Further, in the central cross section of FIG. 8, the width in the front-rear direction from the width 14f at the lower end of the rising pipe 14c to the width 14g at the upper end is formed to be substantially constant, and the drain trap pipe 14 is miniaturized in the front-rear direction. ing.

As shown in FIG. 10, the automatic cleaning unit 4 stops the main water supply pipe 16 forming the main water supply channel 16a to which cleaning water is supplied from a water supply source (not shown) such as water supply, and the main water supply pipe 16. A pipe joint 24 that is connected to the downstream end of the main water supply pipe 16 and is a branch portion that branches the main water supply pipe 16 to the first water supply pipe 20 and the second water supply pipe 22. And have.
Further, the first water supply pipe 20 branched from the main water supply pipe 16 by the pipe joint 24 has a first water flow rate of washing water passing through the water supply channel (first water supply channel 20a) inside the first water supply pipe 20. A first constant flow rate valve 26 that adjusts to a predetermined instantaneous flow rate Q1 [liter / minute] is provided.
Further, on the downstream side of the first constant flow rate valve 26, a first on-off valve 28 for opening and closing the first water supply channel 20a is provided. At the downstream end of the first water supply channel 20a on the downstream side of the first on-off valve 28, a spreader 30 (water discharge portion) which is a part of a water discharge device for discharging wash water is provided in the bowl portion 6. The first water discharge portion 32 of the spreader 30 is connected to the downstream end portion of the first water supply channel 20a. In the present embodiment, the first predetermined instantaneous flow rate Q1 [liter / min] is preferably 8 [liter / min] to 17 [liter / min], more preferably 8 [liter / min] to 12 [. It is set to [liters / minute], and even more preferably 9 [liters / minute].

On the other hand, in the other second water supply pipe 22 branched from the main water supply pipe 16 by the pipe joint 24, the instantaneous flow rate of the washing water passing through the water supply channel (second water supply channel 22a) inside the second water supply pipe 22 has a second. A second constant flow rate valve 34 is provided for adjusting to a second predetermined instantaneous flow rate Q2 [liter / minute] lower than the predetermined instantaneous flow rate Q1 [liter / minute] of 1.
Further, on the downstream side of the second constant flow rate valve 34, a second on-off valve 36 for opening and closing the second water supply channel 22a is provided. A second water discharge portion 38 of the spreader 30 is connected to a downstream end portion of the second water supply channel 22a on the downstream side of the second on-off valve 36. In the present embodiment, the second predetermined instantaneous flow rate Q2 [liter / min] is preferably set to 0.1 [liter / min] to 8.0 [liter / min], and more preferably 0. It is set to 1 [liter / minute] to 0.6 [liter / minute], and more preferably 0.3 [liter / minute]. The difference in instantaneous flow rate between the first predetermined instantaneous flow rate Q1 [liter / minute] and the second predetermined instantaneous flow rate Q2 [liter / minute] is preferably 1.0 [liter / minute] to 8.9. Set to [liters / minute].

Next, on the downstream side of the second on-off valve 36, an electric release bacterial water unit 42 is provided via a check valve 40, and the electric release bacterial water unit 42 generates electric release bacterial water. An electrolytic cell (not shown) is provided, and the second water discharge unit 38 is provided with an electrolysis tank (not shown) to function as an electrolysis fungus water supply unit.

Further, the automatic cleaning unit 4 receives a detection sensor 44 as a human body detection sensor provided on the spreader 30 to detect the presence or absence of a user standing on the front side of the toilet bowl main body 2, and a detection signal transmitted from the detection sensor 44. It includes a controller 46 which is a control unit that receives and controls the operation of each of the first on-off valve 28 and the second on-off valve 36 based on a predetermined control program or the like.

The detection sensor 44 is an infrared type human body detection sensor. The detection sensor 44 is based on the use of another detection sensor that detects the use (state of use) of the user's urinal, for example, a Doppler type sensor using microwaves, or the use of the user's urinal. It may be a flow rate detection sensor or the like that detects the flow of urine. Since the Doppler type sensor can detect not only the human body of the user but also the urine flow, it is possible to more accurately identify the presence or absence of urination on the bowl surface.

The controller 46 has a built-in CPU, memory, and the like, and can control other devices based on a predetermined control program and the like. By controlling the opening / closing operation of the first on-off valve 28, the controller 46 controls the start and end of the main washing water discharge mode or the organic matter contamination suppression water discharge mode from the first water discharge unit 32. The controller 46 controls the opening / closing operation of the second on-off valve 36 to control the start and end of the urine diluted water discharge mode or the sterilized water discharge from the second water discharge unit 38.

The controller 46 has a urine diluting water discharge mode (first water discharge mode) in which water is discharged from the second water discharge unit 38 during a predetermined period while the detection sensor 44 detects the use of the user, and the detection sensor 44 This washing water discharge mode (second water discharge mode) in which water is discharged from the first water discharge unit 32 after the user's use is no longer detected, and the first water discharge unit 32 periodically based on a set schedule. Organic dirt suppression water discharge mode that suppresses the formation of organic dirt including biofilm in the drain trap pipeline 14 and the horizontal pulling pipe 3 by spouting wash water, and the detection sensor 44 detects the use of the user and determines the detection state. The standby mode in which the user waits for a predetermined standby time P between the time t0 when the urine is diluted and the time t3 when the urine diluting water discharge mode is executed, and the detection time in which the user's detection state by the detection sensor 44 continues is shorter than the standby time P. The non-use mode in which neither the urine dilution water discharge mode nor the main washing water discharge mode is executed when the operation is completed in a time shorter than the set usage confirmation time Q, and the detection time in which the detection state by the detection sensor 44 continues is the usage confirmation time. It is provided with a forced cleaning mode in which the main cleaning water discharge mode is forcibly executed when the forced cleaning time is longer than Q and shorter than the standby time P within the forced cleaning time L. As shown in FIG. 18, the waiting time P is the time from the time t0 to the time t3. The usage confirmation time Q is the time from the time t0 to the time t1. The forced cleaning time L is the time from time t1 to time t3.

As shown in FIG. 22, the details of the organic matter contamination suppressing water discharge mode of the controller 46 will be described later. In the organic matter contamination suppression water discharge mode, an operation signal is periodically transmitted from the controller 46 to the first on-off valve 28 every time T (for example, T = 2 hours) elapses. By this operation signal, the first on-off valve 28 is opened, the washing water W1 is supplied from the first water supply channel 20a to the first water discharge portion 32 of the spreader 30, and the bowl surface 48 of the bowl portion 6 is washed. Ru. Then, the washing water W1 that has washed the bowl surface 48 flows into the drain trap pipe 14 from the drain port 10, and thus bacteria and biofilm in the drain trap pipe 14 and the horizontal pipe 3 on the downstream side thereof. , Urine stones, etc. can be washed away to the downstream side. By such cleaning, the growth of bacteria in the drain trap pipe 14 and the horizontal pipe 3 is suppressed, the formation of organic stains including biofilm is suppressed, and the urine in the drain trap pipe 14 and the horizontal pipe 3 is suppressed. Suppresses the adhesion of stones. Such a water discharge mode for suppressing organic matter contamination fulfills the function of equipment protection cleaning that protects the drainage equipment. The predetermined time T described above is preferably set to 1 hour to 3 hours, more preferably 1.5 hours to 2.5 hours. For the predetermined time T, the time interval may be changed in the middle under the control of the controller 46.

In this embodiment, the first constant flow rate valve is used as a flow rate adjusting means for adjusting the instantaneous flow rates Q1 and Q2 of the cleaning water of the first water supply channel 20a and the second water supply channel 22a of the automatic cleaning unit 4. A form in which each of the 26 and the second constant flow rate valve 34 is adopted will be described, but the present invention is not limited to these forms. Another flow rate adjusting means for adjusting may be adopted, and the operation of the other flow rate adjusting means may be controlled by the controller 46.

In the present embodiment, the first water supply channel 20a and the second water supply channel 22a of the automatic cleaning unit 4 are separately formed, and the first water discharge port 60 and the second water discharge port 76 are separately formed. However, it may be formed so that water is supplied by one common water supply channel and water is discharged by one common spout. For example, the automatic cleaning unit 4 includes a main water supply pipe 16, a first water supply pipe 20 connected to the downstream end of the main water supply pipe 16, and an instantaneous flow rate of cleaning water passing through the first water supply pipe 20. It is provided with a valve body capable of adjusting the above speed and a first on-off valve 28 for opening and closing the first water supply passage 20a on the downstream side of the first constant flow valve 26. The first spout 60 of the first spout 32 is opened at the downstream end of the first water supply channel 20a. The automatic cleaning unit 4 omits the second water supply channel 22a, and discharges water in the urine dilution discharge mode through the first water supply channel 20a. Further, the second spout 76 is omitted, and the spout of the instantaneous flow rate Q2 [liter / min] in the urine dilution spout mode is spouted from the first spout 60. In this way, water may be discharged from the first water discharge port 60 in the urine dilution water discharge mode.

<Details of the bowl>
Next, the details of the bowl portion 6 in the toilet bowl main body of the urinal of the present embodiment will be described with reference to FIGS. 6 to 14.

As shown in FIGS. 6 to 14, a bowl surface 48 for receiving urination is formed on the surface of the bowl portion 6, and the bowl surface 48 forms a substantially J-shape when viewed from the side. The bowl surface 48 is formed so as to extend to the front surface 7 of the storage chamber 8 of the toilet bowl body 2.
The bowl surface 48 has an arc-shaped front portion 48a whose front surface is open so as to face the user from the upper portion to the lower portion thereof. The bowl surface 48 is formed only from the front portion 48a in the upper region where the spreader 30 is provided, without the conventional side surface portion protruding forward from the bowl surface in a wall shape. Such a front surface portion 48a forms a forward curved surface such that the perpendicular line of the tangent line of its own curved surface faces the standing position of the user standing in front of the toilet bowl main body 2. That is, in the horizontal cross section, the front portion 48a is a line in which a perpendicular line extending in the horizontal direction with respect to the tangent line extending in the horizontal direction at all positions connects the left end portion 48b and the right end portion 48c of the bowl surface 48 and extends in the horizontal direction. Crosses the minute.

The front portion 48a of the upper region of the bowl surface 48 is an arc having a substantially single radius of curvature R from the left end portion 48b of the bowl surface 48 to the right end portion 48c in a horizontal cross section (so that the radius of curvature R does not change substantially in the middle). It is one arc, and is formed along an arc called a single R). The bowl surface 48 in the lower region below the upper region forms a complex curved surface shape by a combination of arcs having two types of radii of curvature R or a combination of arcs and straight lines. The front portion 48a of the bowl surface 48 is formed so as to be inclined rearward from the upper end 48d of the bowl surface 48 downward.

The bowl surface 48 of the bowl portion 6 is formed so that the radius of curvature of its horizontal cross section becomes smaller toward the bottom. The radius of curvature of the arc in the horizontal cross section is formed so as to gradually decrease from the upper end 48d of the bowl surface 48 toward the lower end, and the width of the bowl surface 48 in the left-right direction gradually decreases toward the lower end (front view of the bowl surface 48). The width projected by) is formed to be small. The upper limit of the radius of curvature may be almost infinite, that is, the horizontal cross section of the upper end 48d of the bowl surface 48 may be formed in a straight line.

Specifically, as shown in FIGS. 7 and 11, the front portion 48a of the bowl surface 48 is located at a distance L1 (L1 = 150 mm) from the upper end 48d of the bowl surface 48, that is, the height of the horizontal cross section across the spreader 30. In the vertical position, it is formed by an arc having a single radius of curvature with a radius of curvature R1 (R1 = 300 mm), which is a relatively large radius of curvature in a plan view.

As shown in FIG. 12, the front portion 48a of the bowl surface 48 has a curvature radius smaller than the radius of curvature R1 in a plan view at a position of a distance L2 (L2 = 300 mm) from the upper end 48d of the bowl surface 48. It is formed by an arc with a single radius of curvature with a radius R2 (R2 = 200 mm).

The radius of curvature of the front portion 48a is set to, for example, a range of 200 to 500 mm, preferably a range of 200 to 400 mm. By setting this range, it is possible to prevent the hand or arm that grips the user's local area from coming into contact with the bowl surface, which makes it easier for the user to approach the urinal when adding, and as a result, the floor is caused by urine dripping. It is possible to suppress the occurrence of a situation in which the toilet is polluted.

As shown in FIG. 13, the front portion 48a of the bowl surface 48 has a curvature smaller than the radius of curvature R2 in a plan view at a position of a distance L3 (L3 = 450 mm) from the upper end 48d of the bowl surface 48 in the lower region. It is formed by a complex arc shape that combines a radius of curvature R3, which is a radius, and another arc. The radius of curvature of these arcs is smaller than the radius of curvature R2.

As shown in FIG. 14, in the lower region of the bowl surface 48, an arc that opens in a plan view toward the user at a distance L4 (L4 = 500 mm) from the upper end 48d of the bowl surface 48. It is formed by a front portion 48a of the shape portion and a straight portion 48j projecting toward the user on both sides thereof. The radius of curvature R4 of the arc-shaped portion is smaller than the radius of curvature R3.

The left end 48b and the right end 48c of the bowl surface 48 are formed so as to gradually project forward as they go downward. Further, in front of the lower portion of the bowl portion 6, the left end portion 48b and the right end portion 48c of the bowl surface 48 are connected to each other by facing the center side in the left-right direction on the front side of the drainage port 10, and the tip 48f is formed. Is forming.

The bowl surface 48 includes shelves 42 that extend downward from both the left and right sides of the bowl surface 48 to the front side. The shelf 42 is adapted to guide a part of the washing water that reaches near the left and right sides of the bowl surface 48 from the left and right sides of the bowl surface 48 toward the front side in the main washing water discharge mode.
The shelf 42 extends downward from the lower region of the bowl surface 48 toward the tip 48f. The shelf 42 projects laterally inward from the bowl surface 48, and a flat surface portion is formed on the upper surface so that water can easily flow on the shelf 42. Therefore, in the main washing / discharging mode, even when the amount of washing water is reduced, the shelf 42 allows the washing water to reach the front portion of the bowl surface 48 to reliably wash the bowl surface 48 in a wider range than before. can do.

<Details of spreader>
Next, the details of the spreader in the automatic cleaning unit of the urinal of the present embodiment will be described with reference to FIGS. 7, 10, 15 and 16.
First, as shown in FIG. 7, the spreader 30 is provided in the central portion in the left-right direction in the upper region of the bowl surface 48, and the exterior cover 50 is attached to the front side of the spreader 30 and the detection sensor 44. .. In the spreader 30 shown in FIG. 16, the state in which the exterior cover 50 is removed is shown, and related parts such as the detection sensor 44 provided in the spreader 30 are omitted.

As shown in FIGS. 15 and 16, the spreader 30 includes a spreader main body 52 fixedly attached to the bowl surface 48, and a nozzle member 54 inserted and attached to the mounting hole 52a of the spreader main body 52. There is.

As shown in FIG. 16, inside the spreader main body 52, a first water supply channel 20a of the first water supply pipe 20 and a second water supply channel 22a of the second water supply pipe 22 communicate with each other. The water passage 56 and the second water passage 58 are formed respectively.
A first spout 60, which is a part of the first spout 32, is formed at the downstream end on the front side of the first water passage 56. The first water passage 56 of the spreader main body 52 has an upstream water passage 56a formed so as to extend in the front-rear direction and a flow path downward from the front end portion on the downstream side of the upstream water passage 56a. It is provided with a downstream waterway 56b which is formed in a substantially fan shape when viewed from the front so as to be enlarged. As a result, the washing water supplied from the first water supply channel 20a into the upstream water passage 56a passes through the downstream water passage 56b and spreads in the left-right direction on the bowl surface 48 from the first water discharge port 60. The water is discharged as the washing water W1 having a first predetermined instantaneous flow rate Q1 [liter / minute].

Next, as shown in FIGS. 15 and 16, the nozzle member 54 includes a mounting portion 62 that is mounted in the mounting hole 52a of the spreader main body portion 52.
Further, the nozzle member 54 includes a nozzle portion 64 integrally provided at the front end portion of the mounting portion 62 as a part of the second water discharge portion 38. The nozzle portion 64 is formed from the side side of the spreader main body portion 52 toward the lower side. Therefore, the nozzle portion 64 is arranged at a position eccentric with respect to the center line D in the left-right direction of the bowl surface 48. Therefore, the water flow discharged by the urine dilution discharge mode is discharged from a position eccentric with respect to the center line D in the left-right direction of the bowl surface 48.

Inside the mounting portion 62 of the nozzle member 54, a water passage 68 communicating with the second water passage 58 of the spreader main body 52 is formed. A water passage 72 extending from the water passage 68 is formed in the nozzle portion 64 of the nozzle member 54, and a second water discharge portion 38 having a single circular cross-sectional shape is further formed at the tip portion of the nozzle portion 64. A spout 76 is formed. The spout width G of the second spout 76 is the inner diameter of the pipe and is set to about 2 mm. The washing water supplied from the second water supply channel 22a of the second water supply pipe 22 to the water passage 68 of the nozzle member 54 is supplied from the second spout 76 from the first predetermined instantaneous flow rate Q1 [liter / minute]. It is designed to be discharged as wash water W2 having a second predetermined instantaneous flow rate Q2 [liter / min], which is also low. Therefore, the instantaneous flow rate Q2 [liters / minute] of the water discharged from the second water discharge port 76 in the urine dilution water discharge mode is the instantaneous flow rate Q1 [liter / minute] of the water discharged from the first water discharge port 60 in the organic matter contamination suppression water discharge mode. ] It is made smaller. Further, the instantaneous flow rate Q1 [liter / minute] of the water discharged from the first water discharge port 60 in the main washing water discharge mode is the instantaneous flow rate Q2 [liter / minute] of the water discharged from the second water discharge port 76 in the urine diluted water discharge mode. It has been made larger. The cross section of the second spout 76 can be formed into a rectangle such as an ellipse, a rectangle, or a square, in addition to the circular shape. The spout width G of the second spout 76 having a shape other than the circular cross section is defined by the maximum opening width in the direction parallel to the bowl surface 48 immediately below the spout. Further, when water is discharged from the first spout 60 of the spreader 30 in the urine dilution spout mode, the first spout 60 can be used in place of the second spout 76. At this time, the first spout 60 can be formed into a rectangular shape such as an ellipse, a rectangle, or a square in addition to the circular shape. The spout width of the first spout 60 having a shape other than the circular cross section is defined by the maximum opening width in the direction parallel to the bowl surface 48 immediately below the spout.

<Operation of the urinal for each use>
Next, the operation (action) of the urinal according to the embodiment of the present invention will be described with reference to FIGS. 5 to 18.
FIG. 17 is a flowchart showing the control operation of the controller for each use of the urinal according to the embodiment of the present invention, and FIG. 18 is a small diagram according to the embodiment of the present invention. It is a timing chart which shows the state of a detection sensor, the state of use of a user, and the control operation of a controller for each use of this urinal in a urinal. Here, in FIG. 17, S indicates each step.

First, the operation (action) of normal toilet bowl cleaning in the urinal 1 according to the embodiment of the present invention will be described.
First, as shown in FIG. 17, in S0, when the user stands in front of the bowl portion 6 of the toilet body 2 of the urinal 1, the detection sensor 44 is in the detection state of detecting the use of the user (time). t0), the detection signal is transmitted to the controller 46, and the controller 46 recognizes the existence of the user. At this point, the first on-off valve 28 is in a closed state, and the second on-off valve 36 is also in a closed state. The controller 46 executes a standby mode in which the detection sensor 44 waits for a predetermined standby time P from the time t0 when the detection sensor 44 is in the detection state. The controller 46 does not start the urine dilution discharge mode immediately from time t0, but suppresses the discharge of wash water which is difficult to contribute to the dilution of urine before the user starts urinating by executing the preceding standby mode. , Can save wash water to dilute urine. The predetermined standby time P is a standby time intentionally realized to achieve the purpose by a program or the like recorded in the controller 46, and is a water discharge operation slightly caused by a delay in signal transmission or a delay in the operation of the valve body. It is distinguished from the delay time of.

In S1, the controller 46 determines whether or not the usage confirmation time Q (for example, about 5 seconds) has elapsed while the detection state of the user by the detection sensor 44 is continued. The usage confirmation time Q is set shorter than the standby time P. When the continuation of the detection state of the user by the detection sensor 44 ends in a time shorter than the usage confirmation time Q, the controller 46 determines that the user has left without urinating to the urinal 1, which is useless. In order to prevent the use of wash water, the standby mode is interrupted and the non-use mode is executed, and the process proceeds to S12 without executing either the urine dilution water discharge mode or the main wash water discharge mode, and a series of operations is completed. When the detection time for which the detection state of the detection sensor 44 continues is equal to or longer than the usage confirmation time Q, the controller 46 determines that the user is using the urinal 1, proceeds to S2, and waits. Continue mode.

As shown in FIG. 18, the user prepares to urinate by taking off his clothes while standing in front of the bowl portion 6 from time t0 to time t2 before urinating. The time t2 is set as the time after the average undressing time E, which is assumed that the average adult user takes off his clothes and prepares to urinate, has elapsed from the time t0. The undressing time E is set to about 8 seconds. At time t2, the user's urination starts.

In S2, the controller 46 continues the standby mode.
In S3, the controller 46 determines whether or not the waiting time P has elapsed from the time t0 in the standby mode. If the waiting time P has not elapsed since the time t0, the controller 46 proceeds to S4. When the standby time P has elapsed from the time t0, the controller 46 exits the standby mode and proceeds to S5.

In FIG. 19, even if the user starts urinating while waiting for the waiting time P in the waiting mode, the effect that the urine concentration in the washing water in the drain trap pipe 14 can be suppressed to be relatively low will be described.
FIG. 19 shows a case where the urine-diluted water discharge mode is executed after the waiting time P elapses in the urinal of one embodiment of the present invention, a case where the urine-diluted water discharge mode is executed almost simultaneously with the start of urination, and a case where the urine-diluted water discharge mode is executed almost simultaneously with the start of urination, and as a comparative example, urine-diluted water discharge. It is a figure which shows the time change of the urine concentration in the washing water in the drain trap pipeline 14 when the mode is not executed. In FIG. 19, the vertical axis shows the change in the urine concentration in the washing water in the drain trap pipeline 14, and the horizontal axis shows the passage of time.

The case where the urine dilution water discharge mode is executed after the waiting time P elapses in the urinal of one embodiment of the present invention will be described.
At time t0, the detection of the user's use is started. At time t0, the user's urination has not started, and the controller 46 starts the standby mode prior to the urine dilution and water discharge mode.
At time t2, the controller 46 is continuing the standby mode and the urine dilution and drainage mode is not being executed. At time t2, the user's urination begins. As shown at time t2 to time t4, the urine flow flows into the bowl portion 6 and the urine concentration in the drain trap pipeline 14 gradually increases. As described above, even if the user starts urinating while waiting in the standby mode, the water force of urination is relatively weak and the flow rate is relatively small at the initial stage of urination, so that the washing water in the drain trap pipeline 14 is used. Urinary concentration increases slowly and does not increase immediately to the extent that urinary stones develop.

At time t3, the standby time P of the standby mode ends, and the execution of the urine dilution / discharge mode is started. In this way, the urine dilution water discharge mode is executed while the detection sensor 44 detects the user. Even after time t3, the urine concentration of the wash water slightly increases up to the urine concentration M in the state diluted by the urine dilution discharge water mode.

At time t4, the wash water diluted on the bowl surface 48 by the function of the urine dilution discharge water mode flows into the drain trap pipe 14, and the urine concentration of the wash water in the drain trap pipe 14 is urine stone. It is maintained at a constant urine concentration M to the extent that it becomes difficult. Since the urine dilution / discharge mode is executed after the time t4, the increase in the urine concentration in the drain trap pipeline 14 is suppressed. In this way, even if the urine dilution and discharge mode is executed after the standby time P has elapsed, it is possible to control the urine concentration of the wash water in the drain trap pipeline 14 to a predetermined urine concentration M or less so as not to increase too much. Will be. In this way, in order to prevent the urine concentration of the washing water in the drain trap pipeline 14 from increasing too much, the standby time P may be set to a time within the range of 6 seconds to 11 seconds from the time t0. preferable. Further, the waiting time P may be set as a time from the time t0 to the time a few seconds after the expected urination start timing. Therefore, the start of execution of the urine dilution and water discharge mode is made to wait for a waiting time P equal to or longer than the scheduled start time of urination. Therefore, in the early stage of urination where the water force of urination is relatively weak, it is possible to suppress the discharge of washing water which is difficult to contribute to the dilution of urine and save the washing water for diluting urine.

Further, as shown by the change in urine concentration from time t2 to time t4, even if the user starts urinating while waiting in the standby mode, the initial cleaning of the drain trap pipeline 14 is performed at the initial stage of urination. There is wash water, and even if urine flows in, the urine concentration of the wash water is kept relatively low. Therefore, the generation of urinary stones is suppressed. Further, by executing the urine dilution / discharge mode following the standby mode, the urine concentration in the drain trap pipeline 14 can be reduced and the generation of urine stones can be suppressed. Therefore, the standby mode can suppress the discharge of wash water that does not easily contribute to the dilution of urine, and can save the wash water that dilutes urine.

Further, since the user has not worshiped urine until the undressing time E elapses at time t2, the urine concentration of the washing water in the drain trap pipe 14 does not increase. Therefore, by waiting until the start of the execution of the standby mode, it is possible to delay the start of the urine dilution and discharge mode, suppress the discharge of the wash water that does not easily contribute to the dilution of urine, and save the wash water that dilutes the urine.

Next, as shown in FIG. 19, a case where the urine diluted water discharge mode is executed almost simultaneously with the start of urination in the urinal of the embodiment of the present invention will be described. The description of the operation overlapping with the case where the urine dilution discharge mode is executed after the waiting time P has elapsed will be omitted. At time t2, the user's urination begins. At time t2, the controller 46 terminates the standby mode and causes the urine dilution and discharge mode to be executed. Since the urine dilution discharge mode is started, the urine flow is diluted mainly on the bowl surface 48, and the urine concentration of the wash water rises relatively slowly. In this way, the increase in the urine concentration of the wash water in the drain trap pipeline 14 is gradually suppressed, and the increase to the urine concentration of the wash water diluted by the urine dilution and discharge mode. Even when the urine dilution discharge mode is executed at the same time as the start of urination, the urine concentration of the washing water in the drain trap pipeline 14 is controlled to a predetermined urine concentration M or less.

Next, a case where the urine dilution water discharge mode is not executed will be described as a comparative example.
After time t2, the urine diluted water discharge mode is not executed. In the initial stage of urination from time t3 to time t4, the urine concentration of the wash water gradually increases. Since the urine dilution and discharge mode is not executed after the time t4, the urine concentration of the washing water in the drain trap pipeline 14 increases beyond the predetermined urine concentration M. In such a comparative example, by the time the main washing water discharge mode is executed, the washing water in the drain trap pipeline 14 is almost replaced with the urine of the user, and the urine concentration of the washing water becomes almost 100%. ..

Returning to FIG. 17, the flowchart will be described.
In S4, the controller 46 determines whether or not the detection sensor 44 maintains the detection state. When the detection state of the user by the detection sensor 44 does not continue, that is, when the detection state ends, the controller 46 does not execute the urine dilution and water discharge mode, so that the user is urinating urine. In that case, urine dilution and washing of the bowl portion 6 and the drain trap pipeline 14 may be left untreated. Therefore, the controller 46 determines that the user may be slightly urinating to the bowl portion 6, and interrupts the standby mode in order to prevent the urine from remaining flowing into the bowl portion 6. The forced cleaning mode is executed, and the process proceeds to S11. By the forced washing mode, the main washing water discharge mode is preliminarily executed in S11, and the urine is surely diluted and the bowl part 6 and the drain trap line 14 are washed to keep the bowl part 6 hygienic. .. In S4, the controller 46 returns to S2 when the detection sensor 44 continues the detection state.

In S5, the controller 46 executes the urine dilution and water discharge mode at the time t3 when the waiting time P has elapsed from the time t0. As shown in FIGS. 10 and 16, the controller 46 opens the second on-off valve 36 by starting the urine diluting water discharge mode, and flushes the washing water of the main water supply channel 16a of the main water supply pipe 16 to the second. It is supplied to the second water supply channel 22a of the water supply pipe 22. The controller 46 keeps the first on-off valve 28 closed. The wash water W2 flowing through the second water supply channel 22a is adjusted to a relatively low second predetermined instantaneous flow rate Q2 [liter / minute] by passing through the second constant flow valve 34, and the second It flows into the water passage 58. Then, the washing water W2 passes through the water passage 68 inside the nozzle member 54 of the spreader 30, and then is discharged from the second water discharge port 76.

<Water flow shape of water discharge in urine dilution water discharge mode>
Here, the water flow shape of the water discharge in the urine dilution water discharge mode will be described with reference to FIGS. 20 and 21.
In FIGS. 20 (a) to 20 (l), the second predetermined instantaneous flow rate Q2 [liter / min] of the water flow discharged by the urine dilution discharge mode is in the range of 0.125 to 2.0 [liter / min]. It is shown that the wide flow B and the narrow flow C having a width narrower than that of the wide flow B are formed on the bowl surface 48 when changed in. In FIGS. 20 (a) to 20 (l), the origin of each figure indicates the position of the second spout 76, the vertical axis indicates the downward distance [mm] from the second spout 76, and the horizontal axis indicates. Indicates a distance [mm] on the bowl surface 48 in the left-right direction from the second spout 76. As shown in FIGS. 20 (a) to 20 (l), the water flow discharged by the urine dilution water discharge mode forms a wide flow B extending from the second water discharge port 76 to a predetermined width A on the bowl surface 48, and then the bowl. A narrow flow C having a width narrower than the predetermined width A is formed at the lower portion of the surface 48. The predetermined width A is the maximum lateral width of the wide flow B (the width of the bowl surface 48 in the left-right direction). In FIGS. 20 (a) to 20 (l), the predetermined width A and the minimum width F described later are not the projected width of the bowl surface 48 in the front view, but the distance on the bowl surface 48 along the bowl surface 48. It is the width obtained by actual measurement. The water flow discharged by the urine dilution water discharge mode forms a water flow as shown in FIGS. 20 and 21 immediately after the start of water discharge, for example, immediately after t3 in FIG. 18, for example, about 1 second after t3.
21A to 21C are diagrams showing the outline of the water flow on a photograph of the water flow shape of the water discharge in the urine dilution water discharge mode in which water is discharged from the spreader of the urinal according to the embodiment of the present invention. In FIGS. 21A to 21C, in order to show the outline of the flow in an easy-to-understand manner, the outline of the wide flow B of the water discharge in the urine dilution water discharge mode is supplementarily shown by a solid line.

When the instantaneous flow rate of the water discharged by the urine dilution discharge mode is in the range of 0.125 to 2.0 [liters / minute], the predetermined width A of the wide flow B is in the range of 24 mm to 112 mm. .. Further, when the instantaneous flow rate of the discharged water flow is in the range of 0.125 to 1.1 [liters / minute], the predetermined width A of the wide flow B is in the range of 24 mm to 77 mm.
Further, when the instantaneous flow rate of the water discharged by the urine dilution discharge mode is in the range of 0.125 to 2.0 [liters / minute], the minimum width F of the narrow flow C is in the range of 5 mm to 50 mm. Be inside. Further, when the instantaneous flow rate of the discharged water flow is in the range of 0.125 to 1.1 [liters / minute], the minimum width F of the narrow flow C is in the range of 5 mm to 40 mm.

The water flow discharged by the urine dilution water discharge mode changes the predetermined width A of the wide flow B to the narrow flow C when the instantaneous flow rate of this water flow is changed in the range of 0.125 to 2.0 [liters / minute]. The value divided by the minimum width F of is in the range of 1.9 to 5.8, preferably in the range of 3.8 to 5.8, and more preferably in the range of 3.8. When the predetermined width A of the wide flow B becomes larger than the minimum width F of the narrow flow C at a constant ratio, the probability of diluting the urine on the bowl surface 48 is increased, and the urine enters the drain trap pipeline 14. It can be diluted before to prevent the urine flow from flowing into the drain trap line 14 without being diluted. The instantaneous flow rate of the water flow discharged by the urine dilution water discharge mode such that the above value is in the range of 1.9 to 5.8 is more preferably 0.1 to 0.6 [liter / min], and 0. 3 [liters / minute] is more preferable.

The water flow discharged by the urine dilution discharge mode has a predetermined width A of the wide flow B as a second discharge when the instantaneous flow rate of this water flow is changed in the range of 0.125 to 2.0 [liters / minute]. The value divided by the spout width G of the water port 76 is in the range of 12 to 56.
The height position where the wide flow B becomes the predetermined width A is located within the range of 870 mm to 970 mm from the floor surface K. Here, the height of the second spout 76 of the spreader 30 from the floor surface K is about 1020 mm, and the height of the origin (0, 0) on the vertical axis of each figure of FIG. 20 is about 1020 mm from the floor surface K. The height is 1020 mm. The range of a downward distance of 50 mm to 150 mm from the second spout 76 on the vertical axis of each figure of FIG. 20 corresponds to the range of 870 mm to 970 mm from the floor surface K.

As shown in FIGS. 7 and 21A to 21C, the water flow discharged by the urine dilution discharge mode is discharged from the position of the second discharge port 76 eccentric with respect to the left-right center line D of the bowl surface 48. The water flow discharged by the urine dilution water discharge mode forms a wide flow B and a narrow flow C in the region on the left and right center side from the shelf 42. Since it is difficult for the user to direct urine to the shelf 42 and the user tends to urinate in the area central to the shelf 42, it may be easier to combine the urine flow with the wide flow B and / or the narrow flow C. can.

As shown in FIGS. 21A to 21C, the second spout 76 of the spreader 30 is arranged at a position eccentric with respect to the left-right center line D of the bowl surface 48. The bowl surface 48 at the position of the second spout 76 is slightly inclined sideways rather than the front. Therefore, when the instantaneous flow rate of water discharged in the urine diluted water discharge mode is changed in the range of 0.125 to 2.0 [liters / minute], the water flow discharged by the urine diluted water discharge mode is the bowl at this eccentric position. It is possible to form a wide flow B that is obliquely discharged to the surface 48 and spreads over a wider area in the left-right direction. In FIG. 20, the water flow discharged by the urine dilution discharge mode is obliquely discharged to the bowl surface 48 at a position eccentric with respect to the center in the left-right direction, and spreads more widely in the left-right direction around the second water discharge port 76. It is shown that a wide stream B is formed. Further, in FIGS. 21A to 21C, as an example, the instantaneous flow rate of the water discharge in the urine dilution water discharge mode is set to 0.3 [liter / minute], 0.5 [liter / minute] or 0.7 [liter / minute]. In this case, the discharged water flow forms a wide flow B that spreads widely in the left-right direction. In this way, the discharged water flow tends to spread in the left-right direction around the second spout port 76.

Further, when the instantaneous flow rate of water discharged in the urine diluted water discharge mode is changed in the range of 0.125 to 2.0 [liter / minute], the water flow discharged by the urine diluted water discharge mode is in the left-right direction of the bowl surface 48. A wide flow B is formed so as to pass through the central region H. The left-right central region H of the bowl surface 48 is set to, for example, the width of the spreader 30. Further, the water flow discharged by the urine dilution water discharge mode forms a wide flow B extending so as to pass through the center line D in the left-right direction of the bowl surface 48.

FIG. 20 shows how the water flow discharged by the urine dilution discharge mode forms a wide flow B that spreads so as to pass through the center region H in the left-right direction of the bowl surface 48. In FIGS. 20 (b) to 20 (f), the central region H in the left-right direction is illustrated, and the illustration is omitted in other figures. Further, in FIGS. 21A to 21C, the wide flow B spreads below the spreader 30 so as to pass through the left-right center region H of the bowl surface 48 and the left-right center line D. Therefore, it is possible to easily combine the urine that reaches the vicinity of the central region H in the left-right direction of the bowl surface 48 and slightly below the spreader 30 with the wide flow B of the water discharge in the urine dilution water discharge mode, and the urine is caused by the wide flow B. The probability of being diluted can be improved.

In FIG. 7, the wide flow B discharged by the urine dilution discharge mode is indicated by the wash water W2. The washing water W2 flows down the bowl surface 48 and flows into the drain trap pipeline 14 from the drain port 10. The wash water that reaches the drain port 10 is in a state where the water flow discharged by the urine dilution discharge mode and the urine flow due to the user's urination have already merged and the urine concentration has already been reduced. Therefore, it is difficult for the urine flow in a state where the urine concentration is relatively high to flow directly into the drain trap pipeline 14.

It will be described again by returning to FIG. In S6, the controller 46 starts accumulating the amount of water discharged by the urine dilution discharge mode into the integrated amount Wv, and proceeds to S7. The integrated amount Wv of the urine dilution discharge mode discharge water accumulated by the controller 46 is stored in a storage device such as a memory of the controller 46.

In S7, the controller 46 determines whether or not the detection sensor 44 maintains the detection state. If the detection sensor 44 keeps the detection state, the controller 46 proceeds to S8. When the detection sensor 44 no longer detects the use of the user, the controller 46 determines that the user has finished urinating and has left from the front of the toilet bowl body 2, and suppresses wasteful consumption of urine-diluted water discharge. In order to execute the main washing water discharge mode in which the drain trap pipeline 14 and the horizontal pulling pipe 3 are sufficiently washed to suppress the subsequent generation of urinary stones, the process proceeds to S9.

In S8, the controller 46 determines whether or not the abnormal use time has elapsed from the time t0. When the abnormal use time has elapsed, the controller 46 determines that the detection sensor 44 is out of order or the toilet bowl body 2 is in a state of use different from the user's urination, and the water discharge by the urine dilution water discharge mode is useless. Proceed to S9 to suppress consumption. If the abnormal use time has not elapsed, the controller 46 determines that the user's urination is continuing, and returns to S7 so that the urine diluted water discharge mode can be appropriately executed during the user's urination.

In S9, the controller 46 terminates the urine dilution and water discharge mode and proceeds to S10. As shown in FIGS. 10 and 16, the controller 46 closes the second on-off valve 36 and stops the supply of the wash water to the second water supply channel 22a at the end of the urine dilution discharge mode. Therefore, the water discharge from the second water discharge port 76 of the nozzle portion 64 is stopped.

As shown in FIG. 17, in S10, the controller 46 ends the integration of the water discharge amount into the integrated amount Wv by the urine dilution water discharge mode, and proceeds to S11.

In S11, the controller 46 executes the main wash water discharge mode.
As shown in FIGS. 10 and 16, the controller 46 first transmits a control signal to the first on-off valve 28 to open the first on-off valve 28 by executing the main wash water discharge mode. The washing water of the main water supply channel 16a of the main water supply pipe 16 flows only to the first water supply channel 20a via the pipe joint 24.
Next, the washing water W1 flowing through the first water supply channel 20a is adjusted to a relatively high first predetermined instantaneous flow rate Q1 [liter / minute] by passing through the first constant flow rate valve 26. After that, it passes through the first on-off valve 28 and flows into the first water passage 56. Then, the washing water W1 is supplied to the first spout 60 of the first spout 32. In the main washing water discharge mode, the controller 46 opens the first on-off valve 28 for a certain period of time so as to discharge a water discharge flow rate of 0.5 [liter] for each use.

As shown in FIG. 7, the washing water W1 discharged from the first water discharge port 60 is discharged so as to spread in the left-right direction along the bowl surface 48, and spreads from the center of the bowl surface 48 to the left and right ends. Form a stream of water. Therefore, the washing water W1 can wash the bowl surface 48 in a wider range than before. The washing water W1 spreads to the vicinity of both the left and right sides of the bowl surface 48 and flows downward without jumping out of the bowl portion 6.

A part of the washing water W1 discharged from the first water discharge port 60 can flow down along the shelf 42 while being guided toward the front of the bowl surface 48. Therefore, the washing water can reach the front portion of the bowl surface 48 to wash the bowl surface 48 in a wider range than before, and the unwashable portion of the bowl surface 48 can be reduced.

The wash water W1 flowing down the bowl surface 48 flows into the drain trap pipeline 14 from the drain port 10. The wash water W1 flows toward the horizontal pulling pipe 3 on the downstream side of the drain trap pipeline 14, so that the urine in the drain trap pipeline 14 and the horizontal pulling pipe 3 is discharged to the downstream side. The wash water W1 flows at a relatively high instantaneous flow rate Q1 and replaces the diluted urine in the drain trap line 14 with new wash water to make the urine concentration of the wash water in the drain trap line 14 relatively high. It can be greatly reduced. After the predetermined time has elapsed, the controller 46 closes the first on-off valve 28, stops the water discharge operation by the spreader 30, ends the operation of the main wash water discharge mode, and proceeds to S12.

In S12, the controller 46 ends the control operation for each use, which starts after the detection sensor 44 detects the use of the user, and puts the detection sensor 44 in the standby state. When the detection sensor 44 detects the use of the user again, the controller 46 starts the control operation for each use from S0.

<Operation of water discharge mode to suppress organic matter stains>
Next, the operation (action) of the water discharge mode for suppressing organic matter contamination in the urinal 1 according to the embodiment of the present invention will be described. FIG. 22 is a flowchart showing a control operation of a controller that executes an organic matter contamination suppressing water discharge mode in a urinal according to an embodiment of the present invention. In FIG. 22, S indicates each step.
First, as shown in FIG. 22, in S20, the controller 46 starts counting T for a certain predetermined time from the time when the previous organic matter contamination suppressing water discharge mode is executed.

In S21, the controller 46 determines whether or not a predetermined time T has elapsed from the time point of S20. If the predetermined time T has not elapsed, the controller 46 returns to S21. When the predetermined time T has elapsed, the controller 46 determines that water discharge is effective for suppressing the growth of bacteria that generate biofilm in the drain trap pipeline 14 and the horizontal pipe 3. It is decided to execute the organic matter contamination suppression water discharge mode this time, and the process proceeds to S22.

In S22, the controller 46 is the integrated amount Wv of the amount of water discharged by the urine dilution water discharge mode from the execution of the previous organic matter contamination suppression water discharge mode to the determination of the execution of the current organic matter contamination suppression water discharge mode. Is determined whether or not is equal to or greater than the first reference water amount Ws. In the controller 46, when the integrated amount Wv becomes equal to or more than the first reference water amount Ws, the washing water discharged in the urine-diluted water discharge mode is a bacterium that generates a biofilm in the drain trap pipe line 14 and the horizontal pull pipe 3. It is determined that the inside of the pipe is washed with an amount of water that suppresses the growth of the above, and the process proceeds to S23. When the integrated amount Wv is less than the first reference water amount Ws, the controller 46 proceeds to S24 so that the amount of water discharged in the organic matter contamination suppressing water discharge mode can be saved as the case may be. The first reference water volume Ws is set to 2 liters.

In S23, the controller 46 determines that the amount of water discharged in the organic matter contamination suppression water discharge mode this time is the replacement water amount Wm, which is the minimum level water amount required to replace the washing water inside the drain trap pipeline 14. , The organic matter contamination suppression water discharge mode for discharging this water discharge amount is executed, and the process proceeds to S29.

As shown in FIG. 23, when the integrated amount Wv is equal to or greater than the first reference water amount Ws, the amount of water exceeding the second reference water amount Wu or the amount exceeding the first reference water amount Ws is the drain trap. It contributes to the suppression of the growth of bacteria that generate biofilms in the pipeline 14 and the horizontal pipe 3. Therefore, it is considered that the urinals are often used, the accumulated amount Wv is relatively large, and the formation of organic matter stains can be suppressed. Therefore, it is possible to discharge water with a replacement water amount of Wm in the organic matter contamination suppression water discharge mode, replace the washing water inside the drain trap pipeline as a minimum, and further suppress the generation of organic matter contamination in the drain trap pipeline 14. Further, since it is considered that the amount of water that can suppress the generation of organic matter contamination is in an environment where the water is flowing before the execution of the organic matter contamination suppression water discharge mode, the replacement water amount Wm is suppressed to the minimum, and the integrated amount is Wv. It is possible to save water by suppressing an increase in the total water amount with the replacement water amount Wm. The replacement water amount Wm is set to 0.5 liter, but may be set within the range of 0.2 liter to 0.5 liter.

In S24, in the controller 46, the integrated amount Wv of the amount of water discharged by the urine dilution water discharge mode from the execution of the previous organic matter contamination suppression water discharge mode to the execution of the current organic matter contamination suppression water discharge mode is the second reference water amount. It is determined whether or not it is less than Wu.
When the integrated amount Wv is less than the second reference water amount Wu, the controller 46 generates a biofilm in the drain trap pipe line 14 and the horizontal pulling pipe 3 because the amount of water discharged by the urine dilution water discharge mode is small. It is determined that a certain amount of water spouting that suppresses the growth of bacteria is necessary, and the process proceeds to S25.
When the integrated amount Wv is equal to or larger than the second reference water amount Wu, the controller 46 determines that the amount of water discharged in the organic matter contamination suppressing water discharge mode can be saved depending on the case, and proceeds to S26. The second reference water amount Wu is set to 1 liter, but it may be set within the range of 0.5 liter to 1.5 liter.

In S25, the controller 46 determines the amount of water discharged in the organic matter contamination suppression water discharge mode this time to be a constant standard washing water amount Wi, executes the organic matter contamination suppression water discharge mode for discharging this water discharge amount, and proceeds to S29. The standard washing water amount Wi is set to 1 liter, but it may be set within the range of 1.0 liter to 2.0 liter.

As shown in FIG. 23, when the integrated amount Wv is less than the second reference water amount Wu, the user rarely uses the urinal, and the amount of urine flowing into the drain trap pipe 14 and the horizontal pipe 3 is also small. Therefore, the total of the integrated amount Wv and the standard washing water amount Wi can be reduced from the first reference water amount Ws, and the total water amount can be saved. At the same time, since the integrated amount Wv is insufficient compared to the second reference water amount Wu, in addition to suppressing the growth of bacteria that generate biofilm in the drain trap pipeline 14 and the horizontal pulling pipe 3 only by the integrated amount Wv. The drain trap pipeline 14 and the horizontal pipe 3 can be reliably cleaned by the standard cleaning water amount Wi that guarantees the standard cleaning capacity, and the formation of organic stains can be suppressed more reliably.

In S26, the controller 46 starts the organic matter contamination suppressing water discharge mode and proceeds to S27. When the controller 46 starts the operation of the organic matter contamination suppression water discharge mode in this way, the first on-off valve 28 is opened, and a relatively high instantaneous flow rate of washing water is supplied to the drain trap pipe line 14 and the horizontal pulling pipe. .. Since the instantaneous flow rate of the wash water is relatively high, it flows in the drain trap pipeline 14 and the horizontal pipe in a state where the water level rises. Therefore, the washing water washes away the bacteria that generate the biofilm in the drain trap pipe 14 and the horizontal pulling pipe 3 to suppress the growth, and at the same time, the biofilm is washed away to reduce the amount. Therefore, the formation of organic stains including biofilm is suppressed, and the adhesion and generation of urinary stones in the drain trap pipeline 14 and the horizontal pulling pipe 3 are suppressed.

In S27, the controller 46 determines whether or not the total of the integrated amount Wv and the amount of water used Wn discharged in the organic matter contamination suppression water discharge mode has reached the first reference water amount Ws.
When the sum of the integrated amount Wv and the used water amount Wn does not reach the first reference water amount Ws, the controller 46 causes the growth of bacteria that generate a biofilm in the drain trap pipeline 14 and the horizontal pipe 3. It is determined that the first reference water amount Ws that can suppress the above is not reached, and the determination is made again by returning to S27.
When the sum of the accumulated amount Wv and the used water amount Wn reaches the first reference water amount Ws, the controller 46 causes the total water amount to generate a biofilm in the drain trap pipe 14 and the horizontal pipe 3. It is determined that the level at which proliferation can be suppressed has been reached, and the process proceeds to S28.

As shown in FIG. 23, when the integrated amount Wv is equal to or larger than the second reference water amount Wu, the integrated amount Wv exceeds the second reference water amount Wu, so that the biofilm in the drain trap pipeline 14 and the horizontal pulling pipe 3 It contributes relatively much to the suppression of the growth of the bacteria that cause the disease. Therefore, the amount of water used Wn is set by the difference between the first reference amount Ws and the integrated amount Wv, and the amount of water used Wn is reduced to save water. In addition, when the total of the integrated amount Wv and the used water amount Wn satisfies the first reference water amount Ws, the performance of suppressing the generation of organic matter contamination can be ensured. Further, even when the integrated amount Wv increases, it is possible to suppress an increase in the total water amount of the integrated amount Wv and the used water amount Wn.
Further, as the integrated amount Wv increases, the amount of water used Wn discharged in the above-mentioned organic matter contamination suppressing water discharge mode is reduced until the integrated amount Wv reaches the first reference water amount Ws. Therefore, even when the integrated amount Wv is increased, it is possible to suppress the formation of organic matter stains and also suppress the increase in the total water amount of the integrated amount Wv and the used water amount Wn.

Further, the amount of water discharged as one dose by executing the organic matter contamination suppression water discharge mode, for example, the replacement water amount Wm, the standard washing water amount Wi, and the amount of water used Wn having a value larger than the replacement water amount Wm is equivalent to one time of the main cleaning water discharge mode. The value is more than the amount of water discharged by the execution.

In FIG. 23, the standard water discharge state in which the integrated amount Wv is the second reference water amount Wu and the used water amount Wn to be discharged in the organic matter contamination suppression water discharge mode is the standard wash water amount Wi is also illustrated. When the integrated amount Wv is the second reference water amount Wu, the sum of the second reference water amount Wu and the standard washing water amount Wi is the first reference water amount Ws.

As shown in FIG. 22, in S28, the controller 46 ends the execution of the organic matter contamination suppressing water discharge mode, and proceeds to S29. When the execution of the organic matter contamination suppression water discharge mode is completed, the controller 46 closes the first on-off valve 28 and stops the water discharge operation by the spreader 30.
In S29, the controller 46 resets the count of the predetermined time T, returns to S20, and restarts the counting of the predetermined time T from the time when the current organic matter contamination suppressing water discharge mode is executed, that is, from the time of this count reset. ..

<Relationship between the instantaneous flow rate of spouting water and the thickness of organic matter stains>
Next, the relationship between the instantaneous flow rate of the water discharged from the spreader 30 in the urine dilution water discharge mode and the thickness of the organic matter adhering to the drain trap pipe line 14 and the horizontal pulling pipe 3 will be described.
24 and 25 show the case where the instantaneous flow rate of water discharged by the urine-diluted water discharge mode is changed from 0 [liter / minute] to 8.0 [liter / minute] in the urinal according to the embodiment of the present invention. It is a figure which shows the urine concentration of the washing water in the drain trap pipe 14, and the observation image of the organic matter dirt adhering on the slide glass simulating the drain trap pipe 14. FIG. 26 is a diagram showing the relationship between the instantaneous flow rate of water discharged by the urine-diluted water discharge mode in the urinal according to the embodiment of the present invention and the thickness of the attached organic stain, and FIG. It is a figure which shows the relationship between the urine concentration of the washing water in a drain trap pipeline in a urinal, and the thickness of the adhering organic dirt. These results were obtained by an experiment for reproducing the generation of organic contamination in the drain trap pipe line 14 and the horizontal pulling pipe 3 of the urinal 1 in one embodiment of the present invention.

Further, FIG. 28 shows the relationship between the instantaneous flow rate of water discharged in the urine-diluted water discharge mode and the urine concentration of the washing water in the drain trap pipe in the urinal according to the embodiment of the present invention. FIG. 29 is a diagram showing a conventional drain trap pipeline, and FIG. 29 is a diagram showing an instantaneous flow rate of water discharged in a urine-diluted water discharge mode and a urine concentration of wash water in the drain trap pipeline in the urinal according to the embodiment of the present invention. It is a figure which shows the relationship with, about the water-saving type drain trap pipeline and the conventional drain trap pipeline in the region where the instantaneous flow of water discharge is low.
In FIG. 28, the theoretical value of the relationship between the instantaneous flow rate of the water discharged in the urine diluted water discharge mode and the urine concentration of the washing water in the drain trap pipeline 14 is shown by a dotted line. This theoretical value is obtained by the formula of theoretical value [%] = {estimated flow rate of user's urination / (estimated flow rate of user's urination + instantaneous flow rate of water discharge in urine dilution water discharge mode)} × 100. In FIG. 28, the water-saving type drain trap pipeline is a drain trap pipeline having a volume of about 120 ml, and the conventional drain trap pipeline is a drain trap pipeline having a volume of about 700 ml.

An experiment for reproducing the generation of organic matter contamination in the drain trap pipeline 14 and the horizontal pipe 3 is performed as follows. Simulated urine that reproduces the components of urine (calcium, sugar, etc.) and the concentrations of these components with reagents, and the general liquid medium used for culturing microorganisms up to the urine concentration set by tap water. Dilute. This set urine concentration corresponds to each instantaneous flow rate of urine in the urine diluted urine discharge mode. Strains with high biofilm-forming ability and strains with high urease activity are added to this diluted solution at 10 ⁶ cfu / ml, respectively, among the environment-derived bacteria collected from the stains in the trap of the urinal and isolated and cultured. .. Put this liquid in a petri dish to a predetermined amount and immerse the slide glass. After that, the petri dish and the liquid are stored for a predetermined period in an incubator maintained at a temperature of 35 degrees, and organic stains including urinary stones are attached to the slide glass. Then, the slide glass is naturally dried. In this way, the type and thickness of urinary stones that are expected to precipitate in the drain trap pipeline 14 and the horizontal pipe 3 are analyzed. After a lapse of a predetermined period of time, for example, 4 days, 37 days, etc., the deposits adhering to the slide glass are observed and photographed with a laser microscope, and the thickness of organic stains and the like are measured. Specifically, the height of the organic matter stain from the slide glass surface is measured over a predetermined length with a laser microscope, and the average height at the predetermined length is calculated to determine the thickness of the organic matter stain.

As shown in FIG. 24, when the instantaneous flow rate of water discharged in the urine diluted water discharge mode is 0 [liter / minute] (state in which water is not discharged), the urine concentration of the wash water in the drain trap pipe 14 is 100%. Yes, only urine is present. When the urine concentration of the washing water is 100%, the observation image of the organic stains adhering to the slide glass shows that a large number of magnesium ammonium phosphate urinary stones are deposited on the slide glass. In addition, calcium phosphate urinary stones are also deposited.

When the instantaneous flow rate of water discharged in the urine dilution water discharge mode is 0.05 [liter / min], the urine concentration of the washing water in the drain trap pipe 14 is 90%, which is a relatively high urine concentration. From the observation image of the organic matter stains adhering to the slide glass at this time, it can be seen that a relatively large number of magnesium ammonium phosphate urinary stones are deposited. Furthermore, it can be seen that calcium phosphate urinary stones are also deposited.

When the instantaneous flow rate of water discharged in the urine dilution water discharge mode is 0.1 [liter / min], the urine concentration of the washing water in the drain trap pipe 14 is 85%, which is a relatively high urine concentration. From the observation image of the organic matter stains adhering to the slide glass at this time, it can be seen that a relatively large number of magnesium ammonium phosphate urinary stones are deposited. Furthermore, it can be seen that calcium phosphate urinary stones are also deposited.

As shown in FIGS. 24, 26 and 27, when the instantaneous flow rate of water discharged in the urine diluted water discharge mode is larger than 0.1 [liter / min], the urine concentration of the wash water in the drain trap line 14 is 85. It is further reduced from%. Therefore, the amount of ammonia generated is suppressed to be small, and the increase in pH is suppressed to be relatively small. Under such an environment, the generation of magnesium ammonium phosphate urinary stones and the generation of calcium phosphate urinary stones are also suppressed. Therefore, the increase in the thickness of the organic matter stain V containing these urinary stones is suppressed.

As shown in FIGS. 24, 26 and 27, when the instantaneous flow rate of water discharged in the urine diluted water discharge mode is larger than 0.1 [liter / min], the urine concentration of the wash water in the drain trap line 14 is 85. It is further reduced from%. In this way, the increase in pH is suppressed, and the precipitation reaction of calcium phosphate having a relatively small particle size increases (becomes dominant) more than the precipitation reaction of magnesium ammonium phosphate having a relatively large particle size. The increase in the thickness of the urinary stones adhering to the drain trap pipeline 14 and the horizontal pipe 3 is suppressed. Therefore, it is possible to suppress an increase in the thickness of the organic matter stain V containing such urinary stones.

As shown in FIGS. 26 and 29, when the instantaneous flow rate of water discharged in the urine diluted water discharge mode is 0.2 [liter / min] or more, the urine concentration of the washing water in the drain trap pipe 14 is up to the first half of 80%. It will be reduced. By increasing the instantaneous flow rate of the water discharge in the urine dilution water discharge mode to a value of 0.2 liter / min or more, the urine concentration of the washing water can be relatively significantly reduced. As described above, when the urine concentration of the washing water flowing into the water-saving type drain trap 14 and the horizontal pipe 3 is further reduced, the amount of ammonia generated is suppressed and the increase in pH is suppressed relatively little. To. Under such an environment, the generation of magnesium ammonium phosphate urinary stones and the generation of calcium phosphate urinary stones are also suppressed. Even if it occurs, the increase in pH is suppressed to be less, so that the precipitation reaction of calcium phosphate is more increased (dominant) than the precipitation reaction of magnesium ammonium phosphate, so that the drain trap line 14 and The increase in the thickness of the urinary stone adhering to the horizontal pulling pipe 3 is suppressed. Therefore, it is possible to suppress an increase in the thickness of the organic matter stain V containing such urinary stones. FIG. 26 shows that the thickness of the organic matter stain V is further significantly reduced when the instantaneous flow rate of the water discharge in the urine dilution water discharge mode is 0.2 [liter / min] or more.

As shown in FIGS. 24, 26 and 27, when the instantaneous flow rate of water discharged in the urine diluted water discharge mode is 0.222 [liter / min] or more, the urine concentration of the wash water in the drain trap line 14 is 80. It is reduced to% or less. Therefore, the amount of ammonia generated is suppressed to be small, and the increase in pH is suppressed to be relatively small. Under such an environment, the generation of magnesium ammonium phosphate urinary stones and the generation of calcium phosphate urinary stones are suppressed. Therefore, the increase in the thickness of the organic matter stain V containing these urinary stones is suppressed.

As shown in FIGS. 24, 26 and 27, when the instantaneous flow rate of water discharged in the urine diluted water discharge mode is 0.22 [liter / min] or more, the urine concentration of the wash water in the drain trap pipe 14 is 80. It is reduced to% or less. In this way, the increase in pH is further suppressed, and the precipitation reaction of calcium phosphate is more increased (dominant) than the precipitation reaction of magnesium ammonium phosphate, so that it adheres to the drain trap pipe line 14 and the horizontal pipe. Increased thickness of urinary stones is more suppressed. Therefore, the increase in the thickness of the organic matter stain V containing such urinary stones is further suppressed.

As shown in FIG. 29, when the instantaneous flow rate of water discharged in the urine diluted water discharge mode is 0.6 [liter / min] or less, the urine concentration of the wash water in the water-saving type drain trap pipe 14 is taken as a theoretical value. Can be almost matched. When the instantaneous flow rate of water discharged in the urine dilution water discharge mode is 0.6 [liter / min] or less, the urine concentration of the washing water in the drain trap pipe 14 can be reduced to about 62%.

As shown in FIGS. 24, 26 and 27, when the instantaneous flow rate of water discharged in the urine-diluted water discharge mode is 0.6 [liter / min] or less, the urine-diluted water discharge mode is also used in the water-saving drain trap line 14. Since the urine concentration of the wash water is surely reduced by the spouting water, the amount of ammonia generated can be suppressed and the increase in pH can be suppressed relatively little. Therefore, it is possible to more reliably suppress the generation of urinary stones in the water-saving type drain trap pipeline 14.
Further, since the urine concentration of the washing water in the water-saving type drain trap pipeline 14 is surely reduced in the user's usage state, the amount of ammonia generated is suppressed and the increase in pH is suppressed relatively little. To. In such an environment where the increase in pH is suppressed, the precipitation reaction of calcium phosphate increases more than the precipitation reaction of magnesium ammonium phosphate, so that the urinary stones adhering to the drain trap pipe 14 and the horizontal pipe It is possible to more reliably suppress the increase in thickness. Therefore, the increase in the thickness of the organic matter stain V containing these urinary stones is suppressed.

When the instantaneous flow rate of water discharge in the urine dilution water discharge mode is 1.5 [liters / minute] or less, the instantaneous flow rate of water discharge in the urine dilution water discharge mode and the upper limit of the variation in the instantaneous flow rate assumed in the user's urination are The values are relatively close. As shown in FIG. 28, according to the instantaneous flow rate of the water discharged by the urine dilution water discharge mode, the urine concentration of the washing water flowing into the drain trap pipe 14 and the horizontal pipe can be reduced to about 50%. It will be possible. As shown in FIG. 27, when the urine concentration of the washing water in the drain trap pipeline 14 drops to about 50%, the thickness of the organic matter stain can be reduced to about 6 μm as compared with the case of 100%. .. Therefore, the generation of urinary stones can be further suppressed.

As shown in FIG. 28, if water is discharged at an instantaneous flow rate exceeding 2.0 [liters / minute] in the urine-diluted water discharge mode, the drain trap pipe 14 is irrespective of the volume of the drain trap pipe 14. The theory that the urine concentration of the wash water flowing into the horizontal pipe 3 is obtained by dividing the instantaneous flow rate of the user's urination by the value obtained by adding the instantaneous flow rate of the urine-diluted water discharge mode to the instantaneous flow rate of the urine. It becomes the value of the value. At an instantaneous flow rate of 2.0 [liters / minute] or more, the urine concentration of the wash water was almost the same as the theoretical value in both the water-saving type drain trap line 14 and the conventional drain trap line. There is. Exceeding the instantaneous flow rate required to reduce the urine concentration in the water-saving trap line 14, the instantaneous flow rate is increased to the extent that the urine concentration is determined regardless of the water-saving drain trap line 14 and the conventional drain trap line 14. If it is raised, it consumes more washing water than necessary. In this way, when water is discharged at an instantaneous flow rate exceeding 2.0 [liters / minute] in the urine dilution water discharge mode, the moment required to reduce the urine concentration in the water-saving type drain trap pipe line 14. Water will be discharged in excess of the flow rate, resulting in wasted water. Therefore, by spouting water at an instantaneous flow rate of 2.0 [liters / minute] or less in the urine dilution water discharge mode, an effective instantaneous flow rate for effectively reducing the urine concentration in the water-saving type drain trap pipeline 14. It is possible to reduce the amount of wasted water that is discharged in excess of.

As shown in FIGS. 24, 26 and 27, when the instantaneous flow rate of the water discharge in the urine dilution water discharge mode is larger than 3.60 [liters / minute], the urine concentration of the wash water in the drain trap line 14 is 20%. It is reduced to a smaller value. Therefore, the amount of ammonia generated is suppressed to be very small, and the increase in pH is suppressed. Under such an environment, the generation of magnesium ammonium phosphate urinary stones and the generation of calcium phosphate urinary stones are also suppressed. Therefore, the increase in the thickness of the organic matter stain V containing these urinary stones is suppressed. As shown in FIG. 26, when this instantaneous flow rate is larger than 3.60 [liters / minute], the thickness of the organic matter stain V is smaller than 1.0 μm. Further, as shown in FIG. 27, when the urine concentration of the washing water is smaller than 20%, the thickness of the organic matter stain V is smaller than 1.0 μm.

As shown in FIGS. 24, 26 and 27, when the instantaneous flow rate of water discharged in the urine diluted water discharge mode is 3.60 [liters / minute] or less, the urine concentration of the washing water in the drain trap line 14 is 20. % Or more. Here, as shown in FIG. 28, even if the instantaneous flow rate of the water discharge in the urine dilution water discharge mode is increased to exceed 3.60 [liters / minute], the urine concentration of the washing water in the drain trap pipeline 14 Remains a relatively low value smaller than about 20% and is difficult to reduce. At this time, the urine concentration of the washing water in the drain trap pipe 14 was reduced to a predetermined concentration smaller than about 20%, the amount of ammonia generated was also reduced, and the pH of the washing water was reduced to near neutrality. It is in a state. Therefore, even if the instantaneous flow rate of the water discharge in the urine dilution water discharge mode is increased to exceed 3.60 [liters / minute], the increase in the instantaneous flow rate is less likely to contribute to the decrease in the pH of the washing water, resulting in a decrease in pH. There is a possibility of consuming waste water that is difficult to contribute. Therefore, by setting the instantaneous flow rate of the water discharged in the urine diluted water discharge mode to 3.60 [liter / min] or less, it is possible to prevent the consumption of waste water in the urine diluted water discharge mode and suppress the increase in the amount of water discharged.

As shown in FIG. 27, since the urine concentration of the washing water in the drain trap pipeline 14 is set in the range of 20% to 80% by the discharge water in the urine diluted water discharge mode, the drain trap pipeline 14 and the horizontal pipe 3 The urine concentration of the wash water flowing into the water is reduced. Therefore, the amount of ammonia generated can be suppressed, the increase in pH can be suppressed relatively little, and the generation of urinary stones can be suppressed. Therefore, it is possible to suppress the thickness of organic matter stains including urinary stones.
Further, since the urine concentration of the washing water in the drain trap pipeline 14 and the horizontal pipe is reduced to within the range of 20% to 80% by the water discharge in the urine diluted water discharge mode, the amount of ammonia generated is suppressed and the pH is suppressed. The increase in urine is relatively small and suppressed. In such an environment where the increase in pH is suppressed, the precipitation reaction of calcium phosphate becomes dominant over the precipitation reaction of magnesium ammonium phosphate, so that the urine adhering to the drain trap pipe 14 and the horizontal pipe It is possible to suppress the increase in the thickness of the stone. Therefore, it is possible to suppress the thickness of organic matter stains including urinary stones.

As shown in FIG. 27, since the urine concentration of the washing water in the drain trap pipeline 14 is set in the range of 20% to 60% by the discharge water in the urine diluted water discharge mode, the drain trap pipeline 14 and the horizontal pipe 3 The urine concentration of the wash water flowing into the water is further reduced. Therefore, the amount of ammonia generated can be suppressed, the increase in pH can be suppressed relatively little, and the generation of urinary stones can be further suppressed. Therefore, the thickness of organic matter stains including urinary stones can be further suppressed.
Further, since the urine concentration of the washing water in the drain trap pipeline 14 and the horizontal pipe is reduced to within the range of 20% to 60% by the urine diluting water discharge mode, the amount of ammonia generated is suppressed and the pH is suppressed. The increase in urine is relatively small and suppressed. In such an environment where the increase in pH is suppressed, the precipitation reaction of calcium phosphate becomes dominant over the precipitation reaction of magnesium ammonium phosphate, so that it adheres to the inside of the drain trap pipe 14 and the horizontal pipe 3. It is possible to further suppress the increase in the thickness of the urinary stone. Therefore, the thickness of organic matter stains including urinary stones can be further suppressed.

Next, with reference to FIGS. 30 and 31, the action of reducing the urine concentration of the washing water remaining in the drain trap pipe line 14 and the horizontal pulling pipe 3 by the water discharge in the urine dilution water discharge mode will be described. 30 (a) to 30 (d) show the washing remaining in the horizontal pulling pipe after the user urinates and the main washing water discharge mode is performed in the urinal in which the urine dilution water discharge mode of the comparative example is not performed. It is a figure explaining the state of water. In FIGS. 31 (a) to 31 (d), in the urinal according to the embodiment of the present invention, the urine diluting water discharge mode is executed when the user urinates, and the main wash water discharge mode is performed after urination, and then the main wash water discharge mode is performed. It is a figure explaining the state of the washing water remaining in a horizontal pulling pipe.

As shown in FIG. 30 (a), as a comparative example, in a urinal in which the urine diluting water discharge mode is not performed, when the user urinates, the user's urine flows into the drain trap pipe line 14 and the horizontal pull pipe 3. It is a figure explaining. In the water-saving type drain trap pipe having a small capacity of the drain trap pipe 14, the user's urine replaces the drain trap pipe 14 almost as it is in a state where the urine concentration is high, and flows to the horizontal pull pipe 3.

As shown in FIG. 30B, when the execution of the main washing water discharge mode is started, the washing water flows into the drain trap pipe line 14 and the horizontal pulling pipe 3. At this time, the washing water having a high urine concentration flows slightly backward to the upstream side of the confluence portion with the drain trap pipeline 14 in the horizontal pull pipe 3.

As shown in FIG. 30 (c), even during the execution of the main washing water discharge mode, washing water having a high urine concentration may remain on the upstream side of the confluence portion with the drain trap pipe line 14 in the horizontal pulling pipe 3. be.

As shown in FIG. 30 (d), after the execution of the main wash / discharge mode is completed, the wash water having a high urine concentration remaining on the upstream side of the confluence with the drain trap pipeline 14 is contained in the horizontal pipe 3. It may flow out and remain. At this time, since the washing water having a high urine concentration remains in the horizontal pulling pipe 3, urine stones are likely to be generated in the horizontal pulling pipe 3. In addition, magnesium ammonium phosphate having a relatively large particle size can be easily deposited. Therefore, the thickness of the urinary stone adhering to the horizontal pulling pipe 3 may increase.

On the other hand, as shown in FIG. 31 (a), in the urinal in one embodiment of the present invention, the urine dilution water discharge mode is executed when the user urinates. Urinary dilution The user's urination is diluted by the water discharge in the water discharge mode. Washing water with a reduced urine concentration is flowing into the drain trap pipeline 14 and the horizontal pipe 3.

As shown in FIG. 31B, when the execution of the main washing water discharge mode is started, the washing water flows into the drain trap pipe line 14 and the horizontal pulling pipe 3. At the start, the urine concentration of the wash water in the drain trap line 14 has already been reduced. Therefore, the washing water having a low urine concentration flows slightly backward to the upstream side of the confluence portion with the drain trap pipeline 14 in the horizontal pull pipe 3.

As shown in FIG. 31 (c), even if the washing water remains on the upstream side of the confluence portion with the drain trap pipe line 14 in the horizontal pulling pipe 3 even during the execution of the main washing water discharge mode, the washing water remains. The urine concentration is low.

As shown in FIG. 31 (d), after the execution of the main wash / discharge mode is completed, the wash water having a low urine concentration remaining on the upstream side of the confluence with the drain trap pipeline 14 is contained in the horizontal pipe 3. It may flow out and remain. At this time, even if the washing water having a low urine concentration remains in the horizontal pulling pipe 3, it is possible to prevent urine stones from being generated in the horizontal pulling pipe 3. In this way, the urine-diluted water discharge mode can reduce the urine concentration of the washing water remaining in the horizontal pulling pipe 3 after the main washing. Even if urinary stones are generated, the precipitation reaction of calcium phosphate having a relatively small particle size becomes dominant. Therefore, it is possible to suppress an increase in the thickness of the urinary stone adhering to the horizontal pulling pipe 3.

According to the urinal 1 according to the embodiment of the present invention described above, even if urination is started while waiting in the standby mode, the urine concentration in the drain trap line 14 at the initial stage of urination is kept relatively low and urine is urinated. The generation of stones can be suppressed, and the generation of urine stones can be suppressed by reducing the urine concentration in the drain trap pipeline 14 by executing the first water discharge mode after the standby mode. Therefore, according to the present invention, the standby mode can suppress the discharge of wash water that does not easily contribute to the dilution of urine, and can save the wash water that dilutes urine.
Further, according to the present invention, by executing the standby mode, the start of execution of the first water discharge mode is made to wait for a predetermined standby time P while the user standing in front of the bowl portion 6 prepares for urination. It is possible to suppress the discharge of wash water, which is difficult to contribute to the dilution of urine, and save the wash water that dilutes urine.

Further, according to the urinal 1 according to the present embodiment, when the detection state of the user by the detection sensor 44 ends in a time shorter than the set usage confirmation time Q shorter than the standby time P, the user can use the controller 46. It is judged that it is highly possible that the patient did not urinate, and the non-use mode is executed. Therefore, according to the present invention, when it is assumed that the user is not using the urinal 1, it is possible to suppress the discharge of the washing water that dilutes the urine and save the washing water.

Further, according to the urinal 1 according to the present embodiment, when the detection state by the detection sensor 44 ends within the forced cleaning time L longer than the usage confirmation time Q and shorter than the standby time P, the controller 46 is in the first water discharge mode. If the user is urinating, the urine may not be diluted and the bowl portion 6 and the drain trap line 14 may not be cleaned. Therefore, according to the present invention, the controller 46 determines that the user may be urinating, and causes the second water discharge mode to be executed by the forced washing mode to surely dilute the urine and drain the bowl portion 6 and the drainage. Cleaning of the trap pipeline 14 can be performed.

1 Piss 2 Toilet body 3 Horizontal piping 4 Automatic cleaning unit 5 Vertical drain pipe 6 Bowl 7 Front 8 Storage room 10 Drain port 12 Drain 14 Drain trap pipeline 15 Drain socket 16 Main water supply pipe 16a Main water supply channel 18 Stop Water faucet 20 Water supply pipe 20a Water supply channel 22 Water supply pipe 22a Water supply channel 24 Pipe joint 26 First constant flow valve 28 On-off valve 30 Spreader 32 Water discharge part 34 Second constant flow valve 36 On-off valve 38 Water discharge part 40 Check valve 42 Shelf 42 Electric release fungus water unit 44 Detection sensor 46 Controller 48 Bowl surface 48a Front part 48b Left end 48c Right end 48d Upper end 48f Tip 48j Straight part 50 Exterior cover 52 Spreader body 52a Mounting hole 54 Nozzle member 56 Water passage 56a Upstream side water passage 56b Downstream side water passage 58 Water passage 60 Water discharge port 62 Mounting part 64 Nozzle part 68 Water passage 72 Water passage 76 Second water discharge port A Predetermined width B Wide flow C Wide narrow flow D Left-right center line E Time F Minimum width G Spout width H Left-right central area K Floor surface L Forced cleaning time L1 Distance L2 Distance L3 Distance L4 Distance M Urinary concentration P Standby time Q Confirmed use time Q1 Instantaneous flow rate Q2 Instantaneous flow rate R1 Curvature radius R2 Curvature radius R3 Radius of curvature R4 Radius of curvature T Predetermined time U Urinary stone W Wall surface W1 Washing water W2 Washing water Wi Standard washing water amount Wm Replacement water amount Wn First reference water amount Wu Second reference water amount Wv Integrated amount X Bacteria Y Environmental area Z Urease enzyme

Claims (1)

A urinal that cleans the bowl surface with the spouted wash water.
A bowl portion that forms the above-mentioned bowl surface that receives urination and forms a drainage port at the bottom thereof,
A drain trap that communicates with the drain port of the bowl part,
A water spouting part that discharges washing water onto the bowl surface of the bowl part,
A human body detection sensor that detects the user standing in front of the bowl and
A control unit that controls the discharge of washing water by the water discharge unit is provided.
The control unit
The first water discharge mode in which water is discharged from the water discharge unit while the human body detection sensor detects the user, and
A second water discharge mode in which water is discharged from the water discharge unit after the human body detection sensor no longer detects the user,
It is a standby mode in which the human body detection sensor waits for a predetermined standby time between the time when the user is detected and the time when the first water discharge mode is executed, and the first water discharge after the standby time of the standby mode elapses. The standby mode, in which the execution of the mode is started ,
A non-use mode in which neither the first water discharge mode nor the second water discharge mode is executed when the detection state of the user by the human body detection sensor ends in a time shorter than the set usage confirmation time shorter than the standby time. When,
It is characterized by having a forced cleaning mode for executing the second water discharge mode when the detection state by the human body detection sensor ends within the forced cleaning time longer than the usage confirmation time and shorter than the standby time. Urinal to wash.

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