JP2019065527A - urinal - Google Patents

Abstract

To provide a urinal capable of efficiently implementing urine dilution while achieving water saving of a washing water amount of water discharged in a urine dilution water discharge mode depending on decrease in a flow rate of a urine flow in the latter half of urination.SOLUTION: A urinal comprises a urinal body 2, detection sensor 44, a flow rate adjustment device 34 capable of changing a water discharge flow rate, and a control unit 46. The control unit 46 executes a urine dilution water discharge mode in which water is discharged from a water discharge unit while the detection sensor is in a detection mode. In the urine dilution water discharge mode, the control unit 46 makes water discharge start in the beginning of a first period of time after the detection sensor 44 becomes in a detection state, continues the water discharge in a second period of time succeeding the first period of time, continues the water discharge until the detection sensor becoming in a non-detection state in a third period of time succeeding the second period of time, and controls the flow rate adjustment device 34 to make the water discharge be performed so that a water discharge flow rate in the third period of time is lower than that in at least a partial period of time in the second period of time.SELECTED DRAWING: Figure 14

Description

  TECHNICAL FIELD The present invention relates to a urinal, and more particularly to a urinal that cleans a bowl surface with discharged flush water.

  Conventionally, as described in Patent Document 1, a urinal is provided with a urine detection sensor that detects a urine movement by a flow of urine, and an adjustment unit that adjusts water supply to a bowl portion. In this urinal, it is known that the adjustment means is fully opened at the same time as the urine detection sensor detects urine flow, and water is supplied to the bowl to lower the concentration of urine. In this urinal, the urine detection sensor of the urinal detects urine flow, and at the same time, the adjustment means is fully opened, and main flush discharge is started in the bowl portion. This main flush discharge continues even after the urine detection sensor is not detected, and the bowl portion is sufficiently cleaned.

JP, 2012-149415, A Japanese Patent Application Laid-Open No. 63-22931

Yosuke Fujioka, Nobuhiro Umeda, Hachinohe Institute of Technology: Configuration of feature quantity extraction system for classification of urine flow curve pattern, The 250th Annual Conference of the Society of Automated Control Engineers of Japan, Material No. 250-5 (2009.6.19)

However, in the urinal described in Patent Document 1 mentioned above, since main flush discharge for sufficiently washing the bowl portion is also performed from the start of detection of the urine detection sensor to the end of detection, There is a problem that the amount of flush water spouted in the flush operation per one time increases compared to a urinal not spouted. Furthermore, if the user continues to wash and discharge during urination when the urination of the user is relatively long, the increase in the amount of cleaning water becomes more problematic. With the recent demand for saving water for washing water, it is considered as an issue to achieve water saving of the washing water volume of urine dilution spouted water in the urinal.
Further, in the urinal described in Patent Document 1, since the main washing spouting is continued from the detection start to the detection end, a large amount of washing water spouts in vain against the change in the flow rate of the user's urine flow In addition to the problem that water saving can not be achieved, there is also a problem that urine dilution can not be realized efficiently.

  Furthermore, as described in Patent Document 2, in the urinal, preliminary cleaning is performed to wet the entire surface of the inner surface of the toilet for 6 seconds from the detection start of the human detection sensor, and the human detection sensor does not detect after preliminary cleaning. It is known that a constant flow of flush water is spouted so as to prevent an odor from rising up from inside the toilet during the urination action until it becomes.

  However, in the urinal described in Patent Document 2 described above, since the flush water of a constant flow rate is continuously discharged until the detection of the human body detection sensor ends during the urination operation, the flow rate of the user's urine flow In response to the change, a large amount of wash water may be discharged in vain, and there is a problem that water saving of the amount of the wash water to be discharged can not be achieved.

  Therefore, the present invention has been made to solve the problems and problems of the prior art described above, and achieves water saving of the amount of flush water spouted in the urine dilution spouting mode and efficiently realizes urine dilution. The purpose is to provide a urinal that can.

In order to achieve the above-mentioned object, the present invention is a urinal for washing a bowl surface with discharged flush water, which forms the bowl surface to receive urination and forms a drainage port at the bottom thereof. And a urinal body provided with a drainage trap in communication with the drainage port of the bowl portion, a water discharge portion for discharging flush water to the bowl surface, and presence or use of a user using the urinal body A detection sensor for detecting the urine flow excreted by the person urinating the urinal body, a flow rate adjusting device capable of changing the spouting flow rate from the spouting portion, and a control portion to control spouting of flush water by the spouting portion. The control unit executes a urine dilution water discharge mode of discharging water from the water discharge unit while the detection sensor is in a detection state, and the control unit detects the detection sensor in the urine dilution water discharge mode. State After that, water discharge is started at the beginning of the first period, water discharge is continued in the second period following the first period, and the detection sensor is in the non-detection state in the third period following the second period. The water discharge is continued, and the water flow is controlled so that the water discharge flow rate in the third period is smaller than the water discharge flow rate in at least a part of the second period.
Usually, it is assumed that the flow rate of the urine flow due to the user's urination gradually increases from the start of urination and gradually decreases in the second half of the urination after reaching the maximum flow rate. Therefore, according to the present invention, after the detection sensor is in the detection state, the control unit starts water discharge at the beginning of the first period, and continues water discharge in the second period following the first period, and the second period In the subsequent third period, water discharge is continued until the detection sensor is in the non-detection state, and the water flow rate in the third period is smaller than the water discharge flow rate in at least a part of the second period by controlling the flow control device. Allow the water to drain. Therefore, according to the present invention, in the third period before the detection sensor is in the non-detection state, the control unit determines whether the water discharge flow rate is at least a part of the second period according to the decrease in the flow rate of the urine flow. Water discharge is performed to reduce the water discharge flow rate in the third period. Therefore, according to the present invention, it is possible to achieve water saving of the amount of flush water spouted in the urine dilution spouting mode according to the reduction of the flow rate of the urine flow in the second half of urination and to realize urine dilution efficiently. .

In the present invention, preferably, the control unit controls the flow rate adjusting device to perform water discharge so as to reduce the water discharge flow rate within the period of the third period.
In the present invention configured as described above, the control unit controls the flow rate adjusting device to cause water discharge so as to reduce the water discharge flow rate within the period of the third period. As a result, the spouting flow rate of urine dilution spouting spouted from the spouting portion in the third period is reduced, for example, gradually reduced or stepwise reduced including a certain portion, without increasing. Therefore, it is possible to achieve more efficient urine dilution while more reliably achieving water saving of the amount of flush water spouted in the urine dilution spout mode according to the decrease in the flow rate of urine flow in the second half of urination.

In the present invention, preferably, with respect to the water discharge flow rate in the third period, the control unit changes the reduction rate of the water discharge flow rate per unit time from the first reduction rate to the second reduction rate, and the first reduction rate is The flow control device is controlled to be larger than the second reduction rate.
In the present invention configured as described above, the control unit changes, from the first reduction rate to the second reduction rate, the reduction rate of the water discharge flow rate per unit time for the water discharge flow rate in the third period, and the first reduction The flow control device is controlled so that the rate is larger than the second reduction rate. As a result, in accordance with the non-linear decrease in the flow rate of the urine flow in the second half of urination, it is possible to more reliably achieve water saving of the flush water spouted in the urine dilution spout mode and to realize more efficient urine dilution. it can.

In the present invention, preferably, the control unit controls the flow rate adjusting device to perform water discharge so that the water discharge flow rate in the first period is smaller than the water discharge flow rate in at least a part of the second period. .
In the present invention configured as described above, the control unit controls the flow rate adjusting device to cause the water discharge flow rate in the first period to be smaller than the water discharge flow rate in at least a part of the second period. . At this time, the flow rate of the urine flow due to the user's urination gradually increases from the beginning of urination, and the urine concentration in the drainage trap remains relatively low because there is almost no urine in the drainage trap at the beginning of urination There is. Therefore, it is possible to achieve efficient water dilution while achieving water saving of the amount of flush water spouted in the urine dilution water discharge mode according to the gradual increase of the flow rate of urine flow at the initial stage of urination.

In the present invention, preferably, the control unit controls the flow rate adjusting device to perform water discharge so as to increase the water discharge flow rate within the period of the first period.
In the present invention configured as described above, the control unit controls the flow rate adjusting device to perform water discharge so as to increase the water discharge flow rate within the period of the first period. As a result, the spouting flow rate of urine dilution spouted from the spouting portion during the first period is increased, for example, gradually increased or stepwise increased including a certain portion, without decreasing. Therefore, it is possible to achieve more efficient urine dilution while more reliably achieving water saving of the amount of flush water spouted in the urine dilution spout mode according to the increase in the flow rate of urine flow at the initial stage of urination.

In the present invention, preferably, with respect to the water discharge flow rate in the first period, the control unit changes the rate of increase of the water discharge flow rate per unit time from the first increase rate to the second increase rate, and the second increase rate is The flow control device is controlled to be larger than the first increase rate.
In the present invention configured as described above, the control unit changes the water discharge flow rate in the first period from the first increase rate to the second increase rate, and the second increase rate of the water discharge flow rate per unit time. The flow control device is controlled such that the rate is greater than the first increase rate. As a result, it is possible to achieve more efficient urine dilution while more reliably achieving water saving of the amount of flush water spouted in the urine dilution spout mode according to the non-linear increase of the flow rate of urine flow at the initial stage of urination. it can.

In the present invention, preferably, the detection sensor is a urine detection sensor that detects urination to the urinal body.
In the present invention thus configured, since the urine detection sensor detects the urine flow, it is possible to more accurately measure the timing at which the user urinates. Therefore, it is possible to more reliably achieve water saving of the amount of flush water spouted in the urine dilution water discharge mode, and to realize more efficient urine dilution.

  ADVANTAGE OF THE INVENTION According to the urinal of this invention, while achieving water saving of the flush water volume water-discharged in urine dilution water-discharge mode, urine dilution can be implement | achieved efficiently.

A portion of the drainage trap pipeline of the urinal in a state before the user urinates is shown enlarged, and uristone is generated even in a very short time in an environment where organic matter contamination including biofilm is formed It is a figure explaining new findings. After the user urinates, it shows that urine is filled in the drainage trap pipeline until the urinal cleaning operation is performed, and it is extremely short in an environment where organic matter contamination including biofilm is formed. It is a figure explaining the new knowledge from which a urine stone generate | occur | produces even with time. The main cleaning operation of the urinal is performed, and the urine in the drainage trap pipeline shows a state of being replaced with new cleaning water, and even in a very short time in an environment where organic matter contamination including biofilm is formed. It is a figure explaining the new knowledge which a urine stone generate | occur | produces. After urinating by the user, the drainage trap pipeline shown in FIG. 1A is substantially filled with relatively high urine concentration wash water, and it is the same level in an environment where organic matter contamination including biofilm is formed. It is a figure explaining the new knowledge that a difference arises in the generation amount of urinary calculus due to the difference in the urine concentration of the flush water in the drainage trap pipeline and the horizontal draw pipe in the period b. FIG. 2B shows a state after the main cleaning operation is performed on the drainage trap pipeline shown in FIG. 2A, and in an environment in which organic matter contamination including a biofilm is formed, drainage trap pipeline and horizontal pulling in the same period It is a figure explaining the new knowledge that a difference arises in the amount of generation of a urine stone by the difference in the urine concentration of the washing water in piping. After urinating by the user, the drainage trap pipeline shown in FIG. 1A is substantially filled with the wash water having a relatively low urine concentration, and in the environment where the organic matter contamination including the biofilm is formed, the same degree is obtained. It is a figure explaining the new knowledge that a difference arises in the generation amount of urinary calculus due to the difference in the urine concentration of the flush water in the drainage trap pipeline and the horizontal draw pipe in the period b. FIG. 2C shows a state after the main cleaning operation is performed on the drainage trap pipeline shown in FIG. 2C, and in an environment in which organic matter contamination including a biofilm is formed, drainage trap pipeline and horizontal pulling in similar periods. It is a figure explaining the new knowledge that a difference arises in the amount of generation of a urine stone by the difference in the urine concentration of the washing water in piping. It is a figure which shows the thickness of the organic substance dirt with respect to the frequency | count of use for every urine concentration of the wash water in the drainage trap pipeline at the time of a user's urination. It is a figure which shows the mechanism of generation | occurrence | production of the organic substance dirt containing the biofilm in the drainage trap pipeline 14 shown to FIG. 1A. The drainage trap pipeline shown in FIG. 4A is substantially filled with the wash water having a relatively high urine concentration, and the difference in the urine concentration of the wash water in the drainage trap pipeline and the horizontal draw pipe causes the generation of urinary calculus The mechanism is different, and it is a figure explaining a new finding that a difference arises in the increase in thickness of organic matter dirt. When high pH environment arises in the drainage trap pipeline as shown to FIG. 4B, it is a figure explaining that the reaction which precipitates magnesium ammonium phosphate becomes dominant. It is a figure explaining the state to which the magnesium ammonium phosphate produced the comparatively large crystalline urolith of particle diameter by reaction as shown to FIG. 4C. The drainage trap pipeline shown in FIG. 4A is substantially filled with the wash water having a relatively low urine concentration, and due to the difference in the urine concentration of the wash water in the drainage trap pipeline and the horizontal draw pipe, the generation of urinary calculus The mechanism is different, and it is a figure explaining a new finding that a difference arises in the increase in thickness of organic matter dirt. It is a figure explaining that reaction which precipitates calcium phosphate becomes dominant in an environment where pH rise in drainage trap pipeline is controlled comparatively low as shown in Drawing 4E. It is a figure explaining the state which the calcium phosphate produced the comparatively small non-crystalline uristone of particle diameter by reaction as shown to FIG. 4F. 1 is a perspective view of a urinal according to a first embodiment of the present invention. 1 is a front view of a urinal according to a first embodiment of the present invention. It is sectional drawing seen along the VII-VII line of FIG. FIG. 1 is a plan view of a urinal according to a first embodiment of the present invention. FIG. 2 is a view showing a configuration of a toilet bowl automatic cleaning unit according to a first embodiment of the present invention. FIG. 1 is an exploded perspective view of a urinal spreader according to an embodiment of the present invention. FIG. 5 is a side cross-sectional view of a urinal spreader according to an embodiment of the present invention. FIG. 5 is a flow chart showing a control operation of a controller for each use in which the user uses the urinal in the urinal according to the first embodiment of the present invention. FIG. In the urinal according to the first embodiment of the present invention, when the urine concentration of the washing water in the drainage trap pipeline is changed with time and the urine dilution water discharge mode is performed, the urine dilution water discharge mode is not performed as a comparative example. It is a figure shown by comparison with the case where urine discharge flow mode with fixed water discharge flow rate is performed. It is a figure which shows the time change of the flow rate of a standard urine flow in comparison with the time change of the water discharge flow rate in the urinal in 1st Embodiment of this invention. Figure 4 is a central cross-sectional view of a urinal according to a second embodiment of the present invention; In the urinal according to the second embodiment of the present invention, when the urine concentration of the washing water in the drainage trap pipeline is changed with time in the urine dilution water discharge mode, the urine dilution water discharge mode is not performed as a comparative example. It is a figure shown by comparison with the case where urine discharge flow mode with fixed water discharge flow rate is performed. In the urinal according to the second embodiment of the present invention, it is a figure showing time change of flow rate of standard urine flow in comparison with time change of water discharge flow rate.

  As a result of intensive studies, the present inventors have found the following new finding that uristone is generated even in a very short time in an environment in which organic matter stains containing a biofilm are formed.

  Heretofore, the mechanism of the generation of urinary calculus focusing on inorganic stains such as urinary calculus has been known as follows. In this mechanism, urination remains in the drainage trap pipeline and the horizontal draw pipe after the user's use of the urinal, and general bacteria adhere to the retained urine. In this general bacterial metabolic process, an enzyme called urease is excreted. The urease enzyme decomposes urea in urine to generate ammonia. The aqueous solution of ammonia raises the pH in the liquid containing urine and becomes alkaline. In a relatively high environment where the pH exceeds 8.0 to 8.5, the solubility of carbonates and phosphates of Ca and Mg contained in the urine decreases, and these salts are contained in the urine. It precipitates and adheres to drainage trap pipelines and cross piping as urinary stone. It has been considered that the occurrence of such mineral soiled urinary calculus proceeds relatively slowly over a relatively long time of 2 hours or more.

  On the other hand, the present inventors pay attention to the organic matter stain different from the inorganic matter stain among the stains generated in the drainage trap pipeline and the horizontal pulling pipe, and the environment where the organic matter stain including the biofilm is formed. In the case of Uristone, it has been found that uristone is generated even in a very short time of several seconds.

As shown in FIGS. 1A to 1C, the mechanism of the generation of urolith U in a short time is focused on the organic substance stain V containing a biofilm, and is explained as follows.
Organic soiling V is formed by complexing a biofilm centered on EPS (Extracellular Polysaccharide: Extracellular Poly Succharide) released during growth of bacteria X such as general bacteria, proteins contained in urine, etc. . Such organic matter dirt V is known as a slime in piping and forms a very viscous mucus. In the biofilm of such organic matter dirt V, the bacteria X attached to the drainage trap pipeline 14 and the horizontal draw piping 3 etc. form a polymer of polysaccharide outside the cells, and the cells are detached by being enveloped thereby It is believed to be restrained and to develop.

  In FIG. 1A, a part of the drainage trap pipeline 14 of the urinal before the user urinates the urinal is shown enlarged. The drainage trap pipeline 14 shown in FIG. 1A is in a state after the user has continued to use the urinal 1 a number of times. The drainage trap pipeline 14 stores the flush water discharged in the previous main flush discharge mode. Hereinafter, although the state and reaction in the drainage trap pipeline 14 are described in FIGS. 1A to 4G, the state and reaction in equipment piping downstream of the drainage trap pipeline 14 such as the horizontal draw piping 3 and the like are also described. It is substantially the same and is applied to the horizontal drawing pipe 3 and the like.

When the user uses the urinal 1, if a biofilm of organic matter dirt V is formed in the drainage trap pipeline 14, the bacteria X generates and develops this biofilm. The biofilm forms a sponge-like internal structure, and easily retains bacteria X and ammonia (or ammonium ion NH ₄ ⁺ ) inside. Bacteria X excrete the urease enzyme, and this urease enzyme decomposes the urea in the urine to generate ammonia (or ammonium ion NH ₄ ⁺ ). Therefore, a large amount of ammonia (or ammonium ion NH ₄ ⁺ ) is present in the vicinity of the biofilm. The pH of the region in the vicinity of the organic substance stain V is raised to a relatively high value by the ammonia being water-soluble in the liquid in the vicinity of the organic substance stain V to generate ammonium ion NH ₄ ⁺ . The pH of the high pH environment region Y in the vicinity of the organic matter stain V containing a biofilm becomes a value of 8 or more, preferably 9 or more, preferably 8 to 10.

  In FIG. 1B, in the urinal having the drainage trap pipeline 14 as shown in FIG. 1A, the drainage trap is performed for a relatively short time until the user urinates and the urinal cleaning operation is performed. It shows a state in which the inside of the conduit 14 is substantially filled with urine. When this urine comes in contact with or approaches the high pH environment region Y in the vicinity of the organic matter soil V, carbonates and phosphates of Ca and Mg contained in the urine are deposited, and it takes a very short time of several seconds. Mechanism was found to generate urinary stone U.

  In FIG. 1C, after the urinal cleaning operation is performed from the state where the drainage trap pipeline 14 is substantially filled with urine as shown in FIG. 1B, the urine in the drainage trap pipeline 14 is new. It shows the state of being replaced by the washing water. Although the urine in the drainage trap pipeline 14 is replaced with fresh washing water, the deposited urinary stone U remains adsorbed to the organic matter dirt V. Since the biofilm forms a sponge-like internal structure, the urinary stone U is also easily retained. It was also found that when the urolith U adheres in this way, the bacteria X is more easily attached to the urolith U itself, and the generation of the urolith U is further promoted. Thus, it has been found that, by stacking of each short cleaning, urite is deposited on organic matter soil V in a short time, and uristone U is stacked.

  Based on such new findings, the present inventors inhibit the operation of the mechanism that generates urinary calculus in a relatively short time by the contact of the wash water containing urine with the biofilm, and the drainage trap pipeline 14 And, a technique for suppressing the generation of urinals in the horizontal draw pipe 3 is invented.

  Furthermore, the inventors of the present invention have conducted intensive studies to find that the urine of the cleaning water in the drainage trap pipeline 14 and the horizontal draw pipe in an equivalent period in an environment where organic matter contamination including a biofilm is formed. We found the following new findings that the amount of urinary calculus was different due to the difference in concentration.

  In FIG. 2A, in the urinal having the drainage trap pipeline 14 as shown in FIG. 1A, the drainage trap pipeline is performed for a relatively short time until the user urinates and the urinal cleaning operation is performed. The figure shows that 14 is almost filled with relatively high urine concentration wash water. When the wash water having a relatively high urine concentration touches or approaches the high pH environment region Y in the vicinity of the organic matter dirt V, relatively many urinates U are generated in a very short time of about several seconds.

As shown in FIG. 2B, relatively frequent urination U generated is contaminated with organic matter V even after the flushing operation of the urinal is performed and the flushing water in the drainage trap pipeline 14 is replaced with new flushing water. It remains in the state of being absorbed by the
As shown in FIG. 3, when the user urinates, washing water with a relatively high urine concentration flows into the drainage trap pipeline 14 in this manner by repeating it every time the urinal is used. A large amount of generated urinary stone U accumulates on the drainage trap pipeline 14 and makes the thickness of the organic matter dirt V relatively large.

  On the other hand, in FIG. 2C, in the urinal having the drainage trap pipeline 14 as shown in FIG. 1A, the drainage trap is performed for a relatively short time until the user urinates and the urinal cleaning operation is performed. It shows that the inside of the conduit 14 is substantially filled with the relatively low urine concentration wash water. When the wash water with a relatively low urine concentration touches or approaches the high pH environment region Y in the vicinity of the organic matter stain V, relatively little urethral U is generated in a very short time of several seconds. Thus, after the user urinates, the amount of urinary stone U generated depends on the urine concentration of the flush water in the drainage trap pipeline 14 at each equivalent time until the urinal flushing operation is performed. Findings were found. Therefore, if the urine concentration of the flush water in the drainage trap pipeline 14 can be reduced, it has also been found that the deposition amount of the urinary stone U can be suppressed.

As shown in FIG. 2D, the relatively small amount of generated urinary urine U also remains adsorbed to the organic substance stain V after the urinal cleaning operation is performed.
As shown in FIG. 3, relatively low urine concentration wash water flows into the drainage trap pipeline 14 at the time of urination by the user, if it is repeated every time the urinal is used. Since a small amount of urine U accumulates on the drainage trap pipeline 14, the thickness of the organic matter dirt V can be suppressed. It was also found that the difference in the urine concentration of the flush water in the drainage trap pipeline 14 at the time of each user's urination becomes a larger difference in the thickness of the organic substance stain V as the number of times of use increases.

  Furthermore, the inventors of the present invention have conducted intensive studies, and the difference in the urine concentration of the washing water in the drainage trap pipeline 14 and the horizontal draw pipe makes the mechanism of generation of urinary calculus different, and the thickness of the organic matter contamination V increases. Found the following findings:

  In FIG. 4A, the mechanism of the occurrence of the organic matter contamination V including the biofilm in the drainage trap pipeline 14 and the horizontal draw pipe 3 as shown in the above-mentioned FIG. 1A is again schematically shown. As shown in step (a) in FIG. 4A, the user's urination adheres to the drainage trap pipeline 14, and the bacteria X adheres to the urine and grows on the drainage trap pipeline 14. As time passes and / or the number of uses of the urinal 1 increases, 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 dirt V is formed in the drainage trap pipeline 14. Next, the process proceeds from step (b) to step (c). As shown in step (c) in FIG. 4A, the biofilm is likely to retain bacteria X and ammonia (or ammonium ion NH ₄ ⁺ ) inside. The bacteria X inside the biofilm excrete the urease enzyme Z, and this urease enzyme Z decomposes the urea in the urine to generate ammonia (or ammonium ion NH ₄ ⁺ ). Thus, in a state before the user urinates in the urinal, a part of the drainage trap pipeline 14 of the urinal is in a state where the organic matter contamination V as shown in FIG. 4A (c) is formed. ing.

As shown in FIG. 4B, when a relatively high urine concentration of urination and / or washing water flows into the drainage trap pipeline 14 in which the organic matter dirt V is formed as shown in FIG. 4A (c), urea is compared The amount of urea in the urine that the urease enzyme Z degrades is relatively large and ammonia is relatively large. The water solubility of these ammonias causes the formation of ammonium ions NH ₄ ^+, and the pH of the region in the vicinity of the organic matter dirt 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, for example, Ca ²⁺ , Mg ²⁺ , NH ₄ ⁺ , PO ₄ ^3- etc react with ammonia. Then, the reaction for precipitating magnesium ammonium phosphate is dominant. Magnesium ammonium phosphate is a urolith component that is easily produced from urine under alkaline conditions.

  As shown in FIG. 4D, magnesium ammonium phosphate gives rise to relatively large particle size crystalline uroliths. FIG. 4D is an image obtained by a scanning electron microscope (SEM), and the display magnification is 2000 ×. As described later, this image captures organic matter contamination obtained by an experiment that reproduces the occurrence of organic matter contamination in the drainage trap pipeline 14 and the horizontal draw pipe 3 of the urinal 1 according to an embodiment of the present invention. It is The inclusion of such relatively large particle size urinals in the biofilm makes it easy to increase the thickness of the urinals and the thickness of the organic matter stain V. The thickness of the organic matter stain V mainly containing such a magnesium ammonium phosphate uric acid is likely to be increased more than the thickness of the organic matter stain V containing a calcium phosphate urinary stone described later. As the urine concentration of the washing water in the drainage trap pipeline 14 increases, the deposition ratio of magnesium ammonium phosphate increases, and the thickness of the organic substance stain V increases.

On the other hand, as shown in FIG. 4E, when the urine and / or wash water having a relatively low urine concentration flows into the drainage trap pipeline 14 in which the organic matter contamination V is formed as shown in FIG. 4A (c) Do. At this time, since the amount of urea is relatively small, the amount of urea in the urine that is degraded by the urease enzyme Z is relatively small, and the generation of ammonia is relatively small. Therefore, the rise in pH due to the ammonium ion NH ₄ ⁺ generated by the aqueous solution of ammonia is suppressed relatively low.

As shown in FIG. 4F, in an environment where pH increase is relatively low and suppressed as shown in FIG. 4E, inorganic substances in a liquid containing urine, such as Ca ²⁺ , Mg ²⁺ , PO ₄ ^3−, etc. The two react with each other, and the reaction to precipitate calcium phosphate is dominant. Calcium phosphate is a urinary stone component that is likely to be produced from urine even under an environment closer to neutrality than the environment where magnesium ammonium phosphate described above is likely to be produced from urine.

  As shown in FIG. 4G, calcium phosphate gives rise to relatively small noncrystalline uroliths of particle size. FIG. 4G is an image obtained by a scanning electron microscope (SEM), and the display magnification is 2003 times. As described later, this image captures organic matter contamination obtained by an experiment that reproduces the occurrence of organic matter contamination in the drainage trap pipeline 14 and the horizontal draw pipe 3 of the urinal 1 according to an embodiment of the present invention. It is Calcium phosphate urinary stone is smaller than magnesium ammonium phosphate urinary stone. The inclusion of such relatively small particle size urinals in the biofilm increases the thickness of the urinals and the thickness of the organic soiling V little by little. In the case where the smaller particle size urinal is the main component, the rate of increase in thickness is relatively slow, and the thickness is less likely to be increased. As the concentration of urine in the washing water flowing into the drainage trap pipeline 14 decreases, the deposition rate of calcium phosphate increases, and the thickness of the organic substance stain V becomes difficult to increase.

  The present inventors, based on such new findings, suppress the increase in the urine concentration of the washing water flowing into the drainage trap pipeline 14, and attach the urine stone adhering to the drainage trap pipeline 14 and the horizontal draw pipe 3. Invented a technology to suppress the thickness of

Hereinafter, the structure of the urinal according to the first embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 5 to 8, the urinal 1 is a urinal that cleans the bowl surface with the flush water that has been discharged. The urinal 1 is provided with a toilet body 2 which is a urinal made of pottery, and an automatic cleaning unit 4 which is a water discharging device for automatically discharging flush water for cleaning the toilet body 2 to the toilet body 2 There is.
As for the urinal 1 of the present embodiment, a small wall-mounted type in which the lowermost portion of the toilet body 2 is positioned a predetermined distance above the floor surface K and the back surface of the toilet body 2 is attached along the wall W behind it. Although the toilet bowl will be described, it may be a floor-type urinal in which the toilet body 2 is directly disposed on the floor surface K.
Hereinafter, in the embodiment of the present invention, the floor K side is the lower side, the opposite side to the floor K with the urinal 1 in between, and the upper side, and the front side of the wall W and the side facing the urinal 1 in the front are the front side. The wall surface W side of the urinal 1 is the back side, and the left side is the left side and the right side is the right side when viewed from the front side.

  A bowl portion 6 for receiving urination is formed on the front side of the toilet body 2, and a part of the automatic cleaning unit 4 is accommodated in the upper region of the toilet body 2 on the rear side of the bowl portion 6. Storage room 8 is formed. In addition, a drain port 10 is formed at the bottom of the bowl portion 6 of the toilet body 2. The drainage plate 10 is disposed at the drainage port 10. The toilet body 2 further includes a drainage trap pipe line 14 that is a drainage trap that forms sealed water in the downstream side of the drainage port 10. The drainage trap line 14 communicates with the drainage port 10. On the downstream side of the drainage trap pipeline 14, a transverse drawing piping 3 is connected via a drainage socket 15 or the like that forms a flow passage penetrating the wall surface W.

  The drainage trap pipe line 14 is formed as a water saving type trap such that the volume of the washing water stored so as to form sealed water in the drainage trap pipe line 14 is 200 ml or less. The drainage trap pipe line 14 of such a water saving type trap can replace the washing water in the drainage trap pipe line with a small amount of washing water as compared with the conventional drainage trap pipe line having a volume of about 700 ml. The volume of the water saving type drainage trap pipeline 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 120 ml. Since such a water saving type drainage trap pipeline has a volume smaller than the urine volume of the user's urine, the urine concentration of the flush water in the drainage trap pipeline 14 tends to be high, and this urine Dilution of water is effective for suppressing the deposition of urinary stones in the drainage trap pipeline 14 and the horizontal draw pipe 3.

  The drainage trap pipeline 14 may be a drainage trap in which the volume of the stored cleaning water is larger than 200 ml, for example, a drainage trap with a conventional volume of about 700 ml. Even in the conventional drainage trap pipeline, urine deposits in the drainage trap pipeline 14 and the horizontal draw pipe 3 by diluting the urine and suppressing the increase in the urine concentration of the flush water in the drainage trap pipeline 14 Is suppressed.

  The drainage trap pipeline 14 includes a downward pipeline 14a, a laterally extending folded pipeline 14b, and an upward pipeline 14c. The downfall conduit 14a and the uplift conduit 14c are separated by a common wall 14d. Since the drainage trap pipeline is folded back and forth on the common wall 14d, the drainage trap pipeline 14 is miniaturized and the volume of the drainage trap pipeline 14 is also reduced. In the central cross section shown in FIG. 7, the width 14e in the front-rear direction of the lower end portion of the downfalling pipe 14a and the width 14f in the front-back direction of the lower end portion of the rising pipe 14c are formed to be substantially the same width. Is miniaturized in the front and back direction. Further, in the central cross section shown in FIG. 7, 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 substantially constant, and the drainage trap pipe 14 is miniaturized in the front-rear direction It is done.

As shown in FIG. 9, the automatic cleaning unit 4 stops the main water supply pipe 16 forming the main water supply path 16a to which the cleaning water is supplied from a water supply source (not shown) such as a water supply and the main water supply pipe 16 A pipe joint 24 which is a branching part connected to the water stop valve 18 for water and the downstream end of the main water supply pipe 16 and branching the main water supply pipe 16 into the first water supply pipe 20 and the second water supply pipe 22 And have.
Further, the flow rate (instantaneous flow rate) of washing water passing through the water supply passage (first water supply passage 20a) inside the first water supply pipe 20 branched from the main water supply pipe 16 by the pipe joint 24 The first flow rate valve 26 is provided to adjust the flow rate to a first predetermined flow rate Q1 [liter / minute]. The first flow rate valve 26 is formed to be able to change the flow rate of wash water passing through the inside of the first water supply passage 20a. In addition, the first flow rate valve 26 can function as a flow rate adjustment device when supplying the wash water for urine dilution from the first water supply passage 20 a side. The first flow rate valve 26 has a valve structure capable of adjusting the opening degree of the water passage continuously. The first flow rate valve 26 may have a valve structure capable of adjusting the opening degree of the water passage stepwise. In the first water supply passage 20a, a flow rate sensor may be provided to adjust the passing wash water to an appropriate flow rate.

  Further, on the downstream side of the first flow rate valve 26, a first on-off valve 28 for opening and closing the first water supply passage 20a is provided. At the downstream end of the first water supply passage 20a downstream of the first on-off valve 28, a spreader 30 (water discharger), which is a part of a water discharger for discharging wash water into the bowl portion 6, is provided. The first water discharger 32 of the spreader 30 is connected to the downstream end of the first water supply passage 20a. In the present embodiment, the first predetermined flow rate Q1 [liter / minute] is preferably in the range of 8 [liter / minute] to 17 [liter / minute], more preferably 8 [liter / minute] to 12 It is set in the range of liters / minute, 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 flow rate (instantaneous flow rate) of washing water passing through the water supply path (second water supply path 22a) inside thereof. The second flow rate valve 34 is provided to adjust the second predetermined flow rate Q2 [liters / minute] lower than the first predetermined flow rate Q1 [liters / minute]. The second flow rate valve 34 is a flow rate adjusting device, and is formed to be able to change the flow rate of the washing water passing through the second water supply passage 22a. The second flow rate valve 34 is formed to be able to adjust the opening degree of the water passage continuously. The second flow rate valve 34 may be formed so as to be able to adjust the opening degree of the water passage stepwise. The second flow valve 34 is controlled in response to a command from the controller 46. In the second water supply passage 22a, a flow rate sensor may be provided to adjust passing wash water to an appropriate flow rate.

  A second on-off valve 36 for opening and closing the second water supply passage 22 a is provided downstream of the second flow rate valve 34. The second water discharger 38 of the spreader 30 is connected to the downstream end of the second water supply passage 22 a downstream of the second on-off valve 36. In the present embodiment, the second predetermined flow rate Q2 [liter / minute] is preferably set in the range of 0.1 [liter / minute] to 8.0 [liter / minute], and more preferably 0. It is set in the range of 1 l / min to 0.6 l / min. The flow rate difference between the first predetermined flow rate Q1 [liters / minute] and the second predetermined flow rate Q2 [liters / minute] is preferably 1.0 [liters / minute] to 8.9 [liters / minute]. Minutes] is set.

  Next, on the downstream side of the second on-off valve 36, an electricity release bacteria water unit 43 is provided via the check valve 40, and the electricity release bacteria water unit 43 generates electricity release bacteria water. An electrolyzer (not shown) is provided to function as an electricity release bacterial water supply unit that supplies the second water discharge unit 38 with the electrostatic release bacteria water.

  The automatic cleaning unit 4 is a detection sensor 44 as a human body detection sensor provided on the spreader 30 and standing on the front side (front side) of the toilet body 2 to detect the presence or absence of the user using the toilet body 2; The controller 46 is a control unit that receives the detection signal transmitted from the detection sensor 44 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. ing.

  The detection sensor 44 is an infrared human-body detection sensor. The detection sensor 44 stands in front of the toilet body 2 and detects the presence or absence of the user who uses the toilet body 2.

  The controller 46 incorporates a CPU, a memory and the like, and can control other devices based on a predetermined control program and the like. The controller 46 controls the opening and closing operation of the first on-off valve 28 to control the start and end of spouting in the main flush spouting mode from the first spouting unit 32. The controller 46 controls the opening and closing operation of the second on-off valve 36 to control the start and end of the urine dilution spouting mode from the second spouting portion 38 or spouting of disinfected water. The controller 46 can control the water discharge flow rate from the first water discharger 32 of the spreader 30 by controlling the opening degree of the first flow rate valve 26. The controller 46 can control the water discharge flow rate from the second water discharger 38 of the spreader 30 by controlling the opening degree of the second flow rate valve 34.

  The controller 46 detects the use of the user by the urine dilution water discharge mode in which water is discharged from the second water discharger 38 during a predetermined period while the detection sensor 44 detects the use of the user, and the detection sensor 44 detects the use of the user Before running the urine dilution spouting mode from the time t0 when the detection sensor 44 detects the user's use and becomes the detection state after the main spouting portion 32 performs spouting from the first spouting portion 32 after stopping A control program is provided to execute each of a standby mode for waiting for a predetermined standby time. The controller 46 further includes a control program for executing other control contents.

  In the present embodiment, the first water supply passage 20a and the second water supply passage 22a of the automatic cleaning unit 4 are separately formed, and the first water outlet 60 and the second water outlet 76 are separately formed. However, as a modification, water may be supplied by one common water supply channel, and may be formed to discharge water by one common water outlet. For example, the automatic cleaning unit 4 includes the main water supply pipe 16, the first water supply pipe 20 connected to the downstream end of the main water supply pipe 16, and the flow rate of cleaning water passing through the first water supply pipe 20. A first flow rate valve 26 formed to be changeable, and a first on-off valve 28 for opening and closing a first water supply passage 20a downstream of the first flow rate valve 26 are provided. The first water discharge port 60 of the first water discharge part 32 is opened at the downstream end of the first water supply passage 20a. The automatic cleaning unit 4 omits the second water supply passage 22a, and performs water discharge in the urine dilution water discharge mode through the first water supply passage 20a. Furthermore, the second water outlet 76 is omitted, and water discharge at a flow rate Q2 [liter / minute] in the urine dilution water discharge mode is discharged from the first water outlet 60. As described above, spouting in the urine dilution spouting mode may be performed from the first spout 60.

  Furthermore, in the present embodiment, the second water supply passage 22a branched from the main water supply pipe 16 of the automatic cleaning unit 4 is provided with the second flow rate valve 34, and the water discharge flow rate from the second water discharger 38 of the spreader 30 is Although controlled, as a modification, a spreader 30 is formed by forming a plurality of parallel flow paths from the main water supply pipe 16 to the second water discharger 38 and changing the flow path through which the washing water flows. The water discharge flow rate from the second water discharge unit 38 may be controlled to be changed. For example, the controller 46 controls an on-off valve for opening and closing each flow path provided in each flow path.

Next, with reference to FIGS. 6-8, the detail of the bowl part 6 in the toilet bowl main body of the urinal of this embodiment is demonstrated.
A bowl surface 48 for receiving urination is formed on the surface of the bowl portion 6, and the bowl surface 48 has a generally J-shaped shape in a side view. The bowl surface 48 is formed to extend to the front surface 7 of the storage chamber 8 of the toilet body 2.
The bowl surface 48 has, from the top to the bottom, an arc-shaped front surface portion 48a opened so that the front surface faces the user. The bowl surface 48 is not provided with a side portion projecting like a wall forward from the conventional bowl surface in the upper region where the spreader 30 is provided, and is formed only from the front portion 48a. Such a front portion 48 a forms a forward curved surface in which a perpendicular perpendicular to the curved surface of the front surface portion 48 a is directed to the standing position of the user standing in front of the toilet body 2. That is, in the horizontal cross section, the front portion 48a extends horizontally with respect to the tangent extending in the horizontal direction at all the positions, and connects the left end 48b and the right end 48c of the bowl surface 48 in the horizontal direction. Cross with 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 from the left end 48b to the right end 48c of the bowl surface 48 in a horizontal cross section (1 such that the radius of curvature does not change substantially in the middle) Arcs, which are formed along an arc called a single R). The bowl surface 48 in the lower region below the upper region forms a compound curved surface shape by a combination of arcs having two different radii of curvature or a combination of arcs and straight lines. The front portion 48 a of the bowl surface 48 is formed to be inclined rearward from the upper end 48 d of the bowl surface 48 downward.

The bowl surface 48 of the bowl portion 6 is formed such that the radius of curvature of the horizontal cross section thereof becomes smaller toward the lower side. The radius of curvature of the arc of the horizontal cross section is formed to gradually decrease as it goes downward from the upper end 48d of the bowl surface 48, and the lateral width of the bowl surface 48 gradually as it goes downward (a front view of the bowl surface 48 Is formed so as to reduce the projected width). 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.
The bowl surface 48 includes a shelf 42 extending downward from the left and right sides of the bowl surface 48 to the front side.

Next, the details of the spreader in the automatic cleaning unit of the urinal according to this embodiment will be described with reference to FIGS. 6 and 9 to 11.
First, as shown in FIG. 6, the spreader 30 is provided at the center 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 addition, in the spreader 30 shown in FIG. 11, while showing the state which removed the exterior cover 50, it abbreviate | omits and shows about related components, such as a detection sensor 44 provided in the spreader 30 ,.

  As shown in FIGS. 6 and 11, the spreader 30 includes a spreader body 52 fixedly attached to the bowl surface 48, and a nozzle member 54 inserted and attached to the attachment hole 52a of the spreader body 52. There is.

As shown in FIG. 11, the inside of the spreader main body 52 communicates with the first water supply passage 20 a of the first water supply pipe 20 and the second water supply passage 22 a of the second water supply pipe 22. And the second water passage 58 are formed respectively.
At a downstream end on the front side of the first water flow passage 56, a first water discharge port 60 which is a part of the first water discharge portion 32 is formed. The first water flow passage 56 of the spreader main body 52 has a flow passage directed downward from an upstream water flow passage 56a formed to extend in the front-rear direction and a front end on the downstream side of the upstream water flow passage 56a. To expand, it has a downstream water passage 56b which is formed in a generally fan-like shape in a front view. Thus, the wash water supplied from the first water supply passage 20a into the upstream water flow passage 56a passes through the downstream water flow passage 56b and spreads laterally from the first water discharge port 60 on the bowl surface 48. The first predetermined flow rate Q1 [liter / minute] is to be discharged as the wash water W1.

  Next, as shown in FIG. 6 and FIG. 11, the nozzle member 54 is provided with an attachment portion 62 attached to the attachment hole 52 a of the spreader main body 52. Further, the nozzle member 54 is provided with a nozzle portion 64 integrally provided at the front end portion of the attachment portion 62 as a part of the second water discharge portion 38. The nozzle portion 64 is formed downward from the side of the spreader main body 52. Therefore, the nozzle portion 64 is disposed at a position eccentric to the horizontal center line D of the bowl surface 48. Therefore, the water flow spouted in the urine dilution spout mode is spouted from a position eccentric to the lateral center line D of the bowl surface 48.

  A water passage 68 communicating with the second water passage 58 of the spreader main body 52 is formed inside the mounting portion 62 of the nozzle member 54. A water flow passage 72 extending from the water flow passage 68 is formed in the nozzle portion 64 of the nozzle member 54, and further, at the tip of the nozzle portion 64, a second water discharge portion 38 has a single circular cross section. A water outlet 76 is formed. The washing water supplied from the second water supply passage 22a of the second water supply pipe 22 to the water flow passage 68 of the nozzle member 54 has a flow rate from the second water discharge port 76 at a first predetermined flow rate Q1 [liter / minute]. The water is discharged as the wash water W2 having a low second predetermined flow rate Q2 [liters / minute]. Further, the flow rate Q1 [L / min] of spouted water from the first spout 60 in the main flush spouting mode is larger than the flow rate Q2 [L / min] of spouted water from the second spout 76 in the urine dilution spouting mode. It is done. Furthermore, when water discharge in the urine dilution water discharge mode is performed from the first water discharge port 60 of the spreader 30, the first water discharge port 60 can be used instead of the second water discharge port 76.

Next, the operation (action) of the urinal according to the first embodiment of the present invention will be described with reference to FIGS. 12 to 14.
FIG. 12 is a flow chart showing the control operation of the controller for each use in which the user uses the urinal according to the first embodiment of the present invention, and FIG. 13 is the first embodiment of the present invention In the urinal of the case, when the urine concentration in the drainage trap pipeline changes with time and the urine dilution spouting mode is executed, if the urine dilution spouting mode is not executed, the urine dilution with a constant spout flow rate as a comparative example FIG. 14 is a diagram showing comparison with the case where the water discharge mode is performed, and FIG. 14 shows a time change of a standard urine flow rate and a time change of a water discharge flow rate in the urinal according to the first embodiment of the present invention. It is a figure shown comparing.
In FIG. 12, S indicates each step. When the urine dilution water discharge mode in FIG. 13 is not executed, the time change of the urine concentration of the flush water in the drainage trap pipeline when only the user's urination is performed without the urine dilution water discharge mode being executed is shown. . Furthermore, in FIG. 13, the time change of the flow rate of the standard urine flow as shown in FIG. 14 is shown to be contrastable with the timing of the time change of the urine concentration of the wash water in the drainage trap pipeline. The time change of the flow of this standard urine flow shows the change of the flow on the vertical axis of FIG. 13, and shows the time course on the horizontal axis. Further, in FIG. 14, the vertical axis indicates changes in the flow rate of spouted water discharged from the second water outlet 76 and the flow rate of the standard urine flow, and the horizontal axis indicates time lapse.

  First, as shown in FIG. 12, when the user stands on the front side of the bowl portion 6 of the toilet body 2 of the urinal 1 at S0, the detection sensor 44 detects the user's use (the time is reached (time) t0), the detection signal is transmitted to the controller 46, and the controller 46 recognizes the presence of the user. At this time, the first on-off valve 28 is in a closed state, and the second on-off valve 36 is also closed.

  In S1, the controller 46 starts execution of the urine dilution water discharge mode from time t0, and proceeds to S2. As shown in FIGS. 9 and 11, the controller 46 causes the second on-off valve 36 to be opened by the start of the urine dilution water discharge mode, and the cleaning water of the main water supply passage 16a of the main water supply pipe 16 is The water is supplied to the second water supply passage 22 a of the water supply pipe 22. The controller 46 keeps the first on-off valve 28 closed. The flush water W2 which has flowed to the second water supply passage 22a passes through the second flow rate valve 34 and flows into the second water passage 58. Then, after passing through the water flow passage 68 inside the nozzle member 54 of the spreader 30, the washing water W2 is discharged from the second water discharge port 76.

  As shown in FIG. 14, when the detection sensor 44 is in the detection state in the urine dilution water discharge mode, the controller 46 determines that the first period starts and starts measurement of the first period. Therefore, after the detection sensor 44 is in the detection state, water discharge is started from the second water discharge port 76 at the beginning of the first period. The first period is a period from time t0 to time t2 described later. Note that the beginning of the first period may include not only time t0 but also any time from time t0 to time t1 when a certain period has elapsed as the initial time of the first period. At this time, water spouting can be started from the time when a certain period has elapsed from time t0.

  From time t0 to time t1 before the start of urination, the user stands in front of the bowl 6 and is ready to take off clothes and urinate. The time t1 is set as the time from the time t0 on which it is assumed that an average adult user takes off clothes and prepares to urinate. The clothes removal time is set to about 8 seconds. The clothes removal time from time t0 to time t1 is included in the first period. As shown in FIG. 13, from the time t0 to the time t1, the urine concentration in the drainage trap pipeline 14 is almost zero since the user's urination has not started. At time t1, the user starts urination.

  The controller 46 opens the second on-off valve 36 in the first period to continue the spouting from the second spout 76. The controller 46 controls the second flow rate valve 34 to cause water discharge so that the water discharge flow rate R1 in the first period is smaller than the water discharge flow rate R2 in at least a part of the second period described later. Further, the controller 46 controls the second flow rate valve 34 to cause water discharge so as to increase the water discharge flow rate R1 within the period of the first period. The controller 46 controls the opening of the second flow valve 34 to be continuously increased. Within the period of the first period, the spouting flow rate of the urine diluted spouting spouted from the second spout 76 is increased without decreasing. The case where the water discharge flow rate is increased without decreasing includes the case where the water discharge flow rate is gradually increased, or the case where the water discharge flow rate is increased stepwise including the portion kept constant and the increased portion.

  The controller 46 changes the increase rate of the water discharge flow rate per unit time from the first increase rate R1a to the second increase rate R1b for the water discharge flow rate R1 in the first period, and the second increase rate R1b is the first increase rate R1a The second flow valve 34 is controlled to be larger than the above. In the first period, the controller 46 changes the increase rate of the opening of the second flow valve 34 from the increase rate of the opening corresponding to the first increase rate R1a to the increase rate of the opening corresponding to the second increase rate R1b. increase. That is, the controller 46 controls so as to change the increase speed of the opening of the second flow valve 34 in the first period. Not only one but two or more change points of the increase rate of the opening may be provided so as to correspond to the change points of the non-linear increase curve in the increase process X1 of the flow rate of the urine flow described later.

  As shown in FIG. 13, since the user's urination starts from time t1, the urine concentration in the drainage trap pipeline 14 rises. At this time, since the urine dilution spouting of the spouting flow rate R1 is performed, the urine concentration in the drainage trap pipeline 14 is suppressed lower than in the case where the urine dilution spouting mode is not performed. Further, since the water discharge flow rate R1 is increased in the first period, it is suppressed that the urine concentration in the drainage trap pipeline 14 is increased according to the increase in the flow rate increase process of the urine flow X1.

  As shown in FIG. 14, the time at which it is assumed (assumed) that the flow rate of the urine flow increases to the maximum level X2 and the urine concentration in the drainage trap pipeline 14 increases to the maximum level is set to time t2. In FIG. 14, the time change of the flow rate of the standard urine flow is shown in comparison with the time change of the water discharge flow rate. The time change of the flow of this standard urine flow shows the time change of the flow of the flow of urine statistically assumed (assumed) when a standard adult user urinates, for example, The typical urine flow curve pattern of a healthy person shown in FIG. 5 (a) of Patent Document 1 is applied to the operation timing of this embodiment. In the first period, it is assumed that the standard user's urine flow rate has not reached the maximum level X2 and is in the ascending phase X1 below the maximum level X2. Therefore, corresponding to this assumption, the water discharge flow rate R1 in the first period is made smaller than the water discharge flow rate R2, and water saving in the amount of flush water discharged in the urine dilution water discharge mode is achieved and urine dilution is efficiently realized. can do.

  The first period is set to include a period of a rising process X1 of the flow rate of the urine flow mainly from the start of the user's urination. By the spouting water from the second spout 76 in the first period, the urine concentration of the washing water flowing down to the drainage trap pipeline 14 and the horizontal pulling pipe 3 is reduced. The first period is set in the range of 7 seconds to 15 seconds, preferably in the range of 9 seconds to 13 seconds, and more preferably 11 seconds. The controller 46 ends the first period when a predetermined time has elapsed.

  The controller 46 determines that the second period following the first period starts when the first period ends in the urine dilution water discharge mode, and starts measurement of the second period. The detection sensor 44 continues the detection state. The controller 46 continues the opening of the second on-off valve 36 in the second period following the first period to continue the water discharge. The second period is a period from time t2 to time t3 where it is assumed that the urine flow starts decreasing from the maximum level X2. During the second period, it is assumed that the flow rate of the standard user's urine flow mainly reaches the maximum level X2 and the state of the maximum level X2 continues. Therefore, corresponding to this assumption, the water discharge flow rate R2 in the second period is set to the maximum level larger than the water discharge flow rate R1 or the water discharge flow rate R3 and water saving of the flush water volume discharged in the urine dilution water discharge mode is achieved. Urine dilution can be realized efficiently.

  The second period is mainly set to include the period of the maximum level X2 of the urine flow rate. By the spouting water from the second spout 76 within the period of the second period, the urine concentration of the washing water flowing down to the drainage trap pipeline 14 and the horizontal pulling pipe 3 is reduced. The second period is set in the range of 1 second to 4 seconds, preferably in the range of 2 seconds to 3 seconds. The controller 46 ends the second period when a predetermined time has elapsed.

  In the second period, the controller 46 controls the second flow rate valve 34 to cause water discharge so that the water discharge flow rate R2 becomes the maximum water discharge flow rate. In the second period, the water discharge flow rate R2 is maintained constant, but it is sufficient if the water discharge of the water discharge flow rate R2 is performed in at least a part of the second period. In the second period, the controller 46 may change the degree of opening of the second flow rate valve 34 to change the water discharge flow rate.

  As shown in FIG. 14, in the second period, the flow rate of the urine flow is substantially constant at the maximum level X2, and the water discharge flow rate R2 which is the maximum water discharge flow rate is discharged. Therefore, it is suppressed that the urine concentration in the drainage trap pipeline 14 is raised in the second period. Further, since urine dilution spouting of the spouting flow rate R2 is performed, the urine concentration in the drainage trap pipeline 14 is suppressed to be lower than in the case where the urine dilution spouting mode is not performed.

  When the second period ends in the urine dilution water discharge mode, the controller 46 determines that the third period following the second period starts, and starts measurement of the third period. The detection sensor 44 continues the detection state at the start of the third period. The controller 46 continues water discharge until time t5 when the detection sensor 44 is in the non-detection state in the third period following the second period. The third period is a period from time t3 to time t5.

  The user ends urination at time t4 when a predetermined time has elapsed from time t3 in the third period. From time t4 to time t5 when the detection sensor 44 is in the non-detection state, the user prepares the clothes while standing in front of the bowl portion 6 and prepares to leave the toilet main body 2 from the front. The time t5 is set as a time when an average adult wearing time assumed to prepare to leave the clothes worn by an average adult user has passed from the time t4. Such clothes wearing time is included in the third period.

  The controller 46 causes the second on-off valve 36 to be opened for the third period to continue the spouting from the second spout 76. The controller 46 controls the second flow rate valve 34 to cause water discharge so that the water discharge flow rate R3 in the third period is smaller than the water discharge flow rate R2 in at least a part of the second period. The controller 46 controls the second flow rate valve 34 to cause water discharge so as to reduce the water discharge flow rate R3 within the third period. The controller 46 controls the opening degree of the second flow rate valve 34 to decrease continuously. Within the period of the third period, the spouting flow rate of the urine diluted spouting spouted from the second spout 76 is decreased without increasing. When the water discharge flow rate is decreased without increasing, it also includes the case where the water discharge flow rate is gradually decreased, or the case where the water discharge flow rate is decreased stepwise including the portion kept constant and the reduced portion.

  The controller 46 changes the decrease rate of the water discharge flow rate per unit time from the first decrease rate R3a to the second decrease rate R3b for the water discharge flow rate R3 in the third period, and the first decrease rate R3a is the second decrease rate R3b The second flow valve 34 is controlled to be larger than the above. In the third period, the controller 46 changes the decrease rate of the opening of the second flow valve 34 from the decrease rate of the opening corresponding to the first decrease rate R3a to the decrease rate of the opening corresponding to the second decrease rate R3b. Reduce. That is, the controller 46 performs control so as to change the decrease rate of the opening of the second flow valve 34 in the third period. Not only one but two or more change points of the decrease rate of the opening may be provided so as to correspond to the change point of the non-linear decrease curve in the falling step X3 of the flow rate of the urine flow described later.

  In the third period from time t3 to time t5, it is assumed that the flow rate of the standard user's urine flow is lower than the maximum level X2 and is in the descending process X3 until urination ends. Therefore, corresponding to this assumption, the water discharge flow rate R3 in the third period is made smaller than the water discharge flow rate R2, and water saving in the amount of flush water discharged in the urine dilution water discharge mode is achieved, and urine dilution is efficiently realized. can do.

  The third period is mainly set to include the period of the descending process X3 of the urine flow rate. By the spouting water from the second spout 76 within the third period, the urine concentration of the washing water flowing down to the drainage trap pipeline 14 and the horizontal pulling pipe 3 is reduced. The third period ends when the detection sensor 44 is in the non-detection state, but as a modification, the third period is in the range of 20 seconds to 40 seconds, preferably in the range of 20 seconds to 30 seconds, and more preferably 27 seconds If the set period has elapsed, the controller 46 determines that the detection sensor 44 is in the non-detection state, and performs control to terminate the water discharge from the second water discharge port 76. Good.

  As shown in FIG. 13, in the third period, the flow rate of the urine flow is in the descending phase X3 and is smaller than the maximum level X2. In the third period, even if the water discharge flow rate R3 is decreased, the increase in the urine concentration in the drainage trap pipeline 14 is suppressed. In addition, the urine concentration in the drainage trap pipeline 14 is reduced by the spouting of the spouting flow rate R3 according to the decrease in the flow rate of the urine flow. Further, since urine dilution spouting of the water discharge flow rate R3 is performed, the urine concentration in the drainage trap pipeline 14 is suppressed to be lower than in the case where the urine dilution spouting mode is not performed.

  In addition, as a comparative example, in FIG. 13, the time change of the urine concentration of the flush water in the drainage trap pipeline 14 in the case where only the user's urination is performed without the execution of the urine dilution water discharge mode is shown. . In this case, the urine dilution water discharge mode is not executed after time t0. During the first period, the urine concentration of the wash water rises to almost 100%. After the time t2, the flush water in the drain trap pipe 14 is almost replaced with the urine of the user until the main flush water discharge mode is executed, and the urine concentration of the flush water is approximately 100%.

  In addition, as a comparative example, in FIG. 13, the time change of the urine concentration of the wash water in the drainage trap pipeline 14 in the case of executing the urine dilution water discharge mode in which the water discharge flow rate is constant is shown. In the urine dilution water discharge mode of this comparative example, urine dilution water discharge of a constant water discharge flow rate is discharged from the second water discharge port 76 from time t0 to time t5. Thereby, the increase in the urine concentration in the drainage trap pipeline 14 can be suppressed. However, in the first half of the first period and the second half of the third period, waste water that does not contribute to urine dilution or hardly contributes to urine dilution is consumed. Therefore, according to the urine dilution water discharge mode of the comparative example, it is not possible to achieve water saving of the amount of flush water discharged in the urine dilution water discharge mode, and furthermore, it has not been possible to realize urine dilution efficiently.

  As shown in FIG. 12, in S2, the controller 46 determines whether or not the detection sensor 44 maintains the detection state. If the detection sensor 44 maintains the detection state, the controller 46 returns to S2 and makes the determination of S2 again. The controller 46 determines that the user finished urination and left the front of the toilet body 2 when the detection sensor 44 no longer detects the user's use, and the waste of wash water in the urine dilution water discharge mode. The process proceeds to S3 in order to execute the main flush discharge mode in which the consumption is suppressed, and the drainage trap pipe line 14 and the horizontal draw pipe 3 are sufficiently cleaned to suppress the generation of the urinary stones thereafter.

  In S3, the controller 46 ends the urine dilution water discharge mode, and proceeds to S4. As shown in FIGS. 9 and 11, the controller 46 closes the second on-off valve 36 at the end of the urine dilution water discharge mode, and stops the supply of flush water to the second water supply passage 22a. Thus, water spouting from the second spout 76 of the nozzle portion 64 is stopped.

  In S4, the controller 46 executes the main flush discharge mode. As shown in FIGS. 9 and 11, the controller 46 first transmits a control signal to the first on-off valve 28 to open the first on-off valve 28 by execution of the main flush water discharge mode. The washing water of the main water supply passage 16 a of the main water supply pipe 16 flows through the pipe joint 24 only to the first water supply passage 20 a. The flush water W1 having flowed to the first water supply passage 20a passes the first flow rate valve 26, and is spouted from the first water discharge port 60 at a relatively high first predetermined flow rate Q1 [liter / min]. (See Figure 6). The controller 46 causes the first on-off valve 28 to open for a certain period of time so as to discharge the water discharge flow rate of 0.5 [liter] for each use in the main cleaning water discharge mode.

  As shown in FIG. 6, the flush water W1 spouted from the first spout 60 is spouted so as to spread laterally along the bowl surface 48, and the bowl surface 48 can be extensively cleaned.

  The washing water W1 flowing down the bowl surface 48 flows into the drainage trap pipe line 14 from the drainage port 10. The flush water W1 flows toward the horizontal draw pipe 3 on the downstream side of the drain trap pipe 14, thereby discharging the urine in the drain trap pipe 14 or the horizontal draw pipe 3 to the downstream side. The flush water W1 flows at a relatively high flow rate Q1, and the diluted urine in the drainage trap pipeline 14 is replaced with fresh flush water to make the urine concentration of the flush water in the drainage trap pipeline 14 relatively large. It can be reduced. After a predetermined time has elapsed, the controller 46 closes the first on-off valve 28 to stop the water discharge operation by the spreader 30, and ends the operation of the main water discharge mode, and the process proceeds to S5.

  In S5, the controller 46 ends the control operation for each use cycle which starts after the detection sensor 44 detects the user's use, and puts the detection sensor 44 in a standby state. When the detection sensor 44 again detects the use of the user, the controller 46 starts the control operation for each use cycle from S0.

  As a modification, the controller 46 may execute a standby mode in which the controller 46 stands by for a predetermined standby time from time t0 when the detection sensor 44 is in the detection state. At this time, the controller 46 does not start the urine dilution water discharge mode immediately after time t0, and executes the preceding standby mode. As a result, it is possible to suppress the spouting of the wash water which hardly contributes to the dilution of urine before the user's urination starts, and save the wash water for diluting the urine. The predetermined waiting time is a waiting time intentionally realized for achieving the purpose by a program or the like recorded in the controller 46, and of the water discharge operation which slightly occurs due to the delay of the signal transmission or the operation of the valve body. It is distinguished from the delay time.

  The controller 46 starts the standby mode from time t0 when the detection sensor 44 is in the detection state. The controller 46 executes the standby mode and, after a predetermined standby time has elapsed, starts the execution of the urine dilution water discharge mode. The start time of the execution of the urine dilution water spouting mode is near the time t1 at which the user starts urination. The urine concentration of the flush water in the drainage trap pipeline 14 does not rise until the user starts urinating at time t1. Therefore, by waiting until the start of the execution of the standby mode, it is possible to delay the start of the urine dilution water spouting mode, to suppress the spouting of the wash water which hardly contributes to the dilution of urine, and save the wash water for diluting the urine. The standby time of the standby mode is preferably set to a time within the range of 6 seconds to 11 seconds, more preferably 7 seconds to 10 seconds from time t0. Even if the user starts urination while waiting in the standby mode, flush water from the previous flush is present in the drainage trap pipeline 14 in the initial urination, and even if urine flows, urine of the flush water will The concentration is kept relatively low. Therefore, the generation of urinary calculus is suppressed.

  Usually, it is assumed that the flow rate of the urine flow due to the user's urination gradually increases from the start of urination and gradually decreases in the second half of the urination after reaching the maximum flow rate. Therefore, according to the urinal 1 according to the first embodiment of the present invention described above, the controller 46 starts water discharge at the beginning of the first period after the detection sensor 44 is in the detection state, and continues to the first period. The water discharge is continued in the second period, and the water discharge is continued until the detection sensor 44 is in the non-detection state in the third period following the second period, and the second flow rate valve 34 is controlled to perform at least the second period. Water discharge is performed so that the water discharge flow rate in the third period is smaller than the water discharge flow rate in a partial period. Therefore, according to the present embodiment, in the third period before the detection sensor 44 is in the non-detection state, the controller 46 discharges water in at least a part of the second period according to the decrease in the flow rate of the urine flow. Water discharge is performed so that the water discharge flow rate in the third period is smaller than the flow rate. Therefore, according to the present embodiment, according to the reduction of the flow rate of the urine flow in the second half of urination, it is possible to achieve water saving of the amount of flush water spouted in the urine dilution spouting mode and efficiently realize the urine dilution. it can.

  Furthermore, according to the urinal 1 according to the first embodiment, the controller 46 controls the second flow rate valve 34 to cause water discharge so as to reduce the water discharge flow rate during the third period. As a result, the spouting flow rate of urine dilution spouting spouted from the spouting portion in the third period is reduced, for example, gradually reduced or stepwise reduced including a certain portion, without increasing. Therefore, according to the present embodiment, it is possible to more reliably achieve water saving of the amount of flush water spouted in the urine dilution spouting mode according to the decrease in the flow rate of the urine flow in the second half of urination, and more efficient urine dilution. It can be realized.

  Furthermore, according to the urinal 1 according to the first embodiment, the controller 46 changes, from the first reduction rate to the second reduction rate, the reduction rate of the water discharge flow rate per unit time for the water discharge flow rate in the third period, The second flow rate valve 34 is controlled so that the first reduction rate is larger than the second reduction rate. As a result, in accordance with the non-linear decrease in the flow rate of the urine flow in the second half of urination, it is possible to more reliably achieve water saving of the flush water spouted in the urine dilution spout mode and to realize more efficient urine dilution. it can.

  Furthermore, according to the urinal 1 according to the first embodiment, the controller 46 controls the second flow rate valve 34 to make the water discharge flow rate in the first period smaller than the water discharge flow rate in at least a part of the second period. Let the water go out. At this time, the flow rate of the urine flow due to the user's urination gradually increases from the beginning of urination, and the urine concentration in the drainage trap conduit 14 is compared because there is almost no urine in the drainage trap conduit 14 at the initial urination stage. Remain low. Therefore, according to the present embodiment, it is possible to achieve water saving of the flush water volume to be spouted in the urine dilution spouting mode in response to the gradual increase of the flow rate of urine flow at the initial stage of urination, and efficient urine dilution. It can be realized.

  Furthermore, according to the urinal 1 according to the first embodiment, the controller 46 controls the second flow rate valve 34 to cause water discharge so as to increase the water discharge flow rate during the first period. Thereby, the discharge flow rate of urine dilution spouted from the second spout 76 within the period of the first period is increased without decreasing, for example, gradually increased or stepped including a certain portion. Be increased. Therefore, according to the present embodiment, it is possible to more reliably achieve water saving of the amount of flush water spouted in the urine dilution spout mode according to the increase of the flow rate of urine flow at the initial stage of urination, and to perform more efficient urine dilution. It can be realized.

  Furthermore, according to the urinal 1 according to the first embodiment, the controller 46 changes the water discharge flow rate in the first period from the first increase rate to the second increase rate of the water discharge flow rate per unit time, and The second flow rate valve 34 is controlled so that the second increase rate is larger than the first increase rate. As a result, it is possible to achieve more efficient urine dilution while more reliably achieving water saving of the amount of flush water spouted in the urine dilution spout mode according to the non-linear increase of the flow rate of urine flow at the initial stage of urination. it can.

Next, a urinal according to a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, in place of the detection sensor 44 of the first embodiment, a detection sensor 44 capable of detecting the urine flow of the user is provided.
FIG. 15 is a central cross-sectional view of a urinal according to a second embodiment of the present invention, and FIG. 16 is a urinal according to the second embodiment of the present invention, wherein the time change of the urine concentration of the washing water in the drainage trap pipeline is FIG. 17 is a diagram showing comparison with the case of executing the urine dilution water discharge mode in which the water discharge flow rate is constant as a comparative example when the urine dilution water discharge mode is not performed when the urine dilution water discharge mode is performed; In the urinal according to the second embodiment of the present invention, it is a figure showing time change of flow rate of standard urine flow in comparison with time change of water discharge flow rate. The urinal according to the second embodiment has substantially the same structure as the urinal according to the first embodiment described above, so the same parts as those of the first embodiment described above are designated by the same reference numerals, and the description thereof will be omitted. .

  The automatic cleaning unit 4 of the urinal 101 is provided on the spreader 30 and receives a detection signal transmitted from the detection sensor 144 and a predetermined detection sensor 144 for detecting the urine flow urinated by the user into the toilet body 2 and predetermined. The controller 46 is a control unit that controls the operation of each of the first on-off valve 28 and the second on-off valve 36 and the like based on the control program or the like.

  The detection sensor 144 is a Doppler type sensor using microwaves. The detection sensor 144 detects the urine flow urinated by the user into the toilet body 2. The detection sensor 144 is provided in the bowl portion 6 but may be provided at another position capable of detecting the urine flow, such as the drainage trap pipeline 14 or the drainage socket 15. For example, the detection sensor 144 may be provided on the back side of the bowl surface 48 so as to detect the urine flow flowing from the back side of the bowl surface 48 to the front side of the bowl surface 48. For example, the detection sensor 144 is disposed at the left and right center of the bowl surface 48 and slightly below the center in the height direction of the bowl surface 48. The detection sensor 144 may be a flow detection sensor or the like that detects the flow of the urine flow. Since the detection sensor 144 is a sensor that detects urine flow, the presence or absence of urination on the bowl surface 48 and the timing of the start and end of urination can be specified more accurately than human detection. The detection sensor 144 can also detect the presence or absence of the user who uses the urinal body. Therefore, as a modification, the detection sensor 144 may be provided to detect both the presence or absence of urination on the bowl surface 48 of the user and the timing of the start and end of urination.

Next, the operation (action) of the normal toilet bowl cleaning in the urinal 1 according to the second embodiment of the present invention will be described. With regard to the description of the operation (action) of the second embodiment, the action of the detection sensor 144 having a structure different from that of the first embodiment described above will be mainly described, and the description of the action of the other similar structure is It is omitted.
First, as shown in FIG. 16, when the user arrives at the front side of the bowl portion 6 of the toilet body 2 of the urinal 1 and stands up at time t0, the detection sensor 144 is in the non-detection state. The controller 46 does not recognize the presence of the user. At this time, the first on-off valve 28 is in a closed state, and the second on-off valve 36 is also closed.

  The user prepares to take off clothes and urinate while standing in front of the bowl portion 6 from time t0 to time t1 before starting urination. The clothes removal time from time t0 to time t1 is not included in the first period described later. As shown in FIG. 16, since the user's urination has not started from time t0 to time t1, the urine concentration in the drainage trap pipeline 14 is almost zero.

  As shown in FIG. 17, at time t1, the user starts urination. When the user's urination starts, the detection sensor 144 detects the user's urine flow, and the detection signal is transmitted to the controller 46, and the controller 46 recognizes the presence of the user. The controller 46 starts the execution of the urine dilution water discharge mode from time t1. The controller 46 opens the second on-off valve 36 by the start of the urine dilution spouting mode, and spouts flush water from the second spout 76. The controller 46 keeps the first on-off valve 28 closed.

  The controller 46 determines that the first period starts when the detection sensor 144 is in the detection state in the urine dilution water discharge mode, and starts measurement of the first period. Therefore, after the detection sensor 144 is in the detection state, water discharge is started from the second water discharge port 76 at the beginning of the first period. The first period is a period from time t1 to time t2 described later. Since the detection sensor 144 can detect the urine flow, it is possible to synchronize the timing of the user's urination start and the timing of the start of the urine dilution water discharge mode, and achieve water saving of the flush water volume discharged in the urine dilution water discharge mode. In addition, more efficient urine dilution can be achieved.

  The controller 46 opens the second on-off valve 36 in the first period to continue the spouting from the second spout 76. The controller 46 controls the second flow rate valve 34 to cause water discharge so that the water discharge flow rate R1 in the first period is smaller than the water discharge flow rate R2 in at least a part of the second period described later.

  The controller 46 controls the second flow rate valve 34 to cause water discharge so as to increase the water discharge flow rate R1 within the period of the first period. The controller 46 controls the opening of the second flow valve 34 to be continuously increased. Within the first period, the spouting flow rate of the urine diluted spouting spouted from the second spout 76 is increased without decreasing. The case where the water discharge flow rate is increased without decreasing includes the case where the water discharge flow rate is gradually increased, or the case where the water discharge flow rate is increased stepwise including the portion kept constant and the increased portion.

The controller 46 changes the increase rate of the water discharge flow rate per unit time from the first increase rate R1a to the second increase rate R1b for the water discharge flow rate R1 in the first period, and the second increase rate R1b is the first increase rate R1a The second flow valve 34 is controlled to be larger than the above. In the first period, the controller 46 changes the increase rate of the opening of the second flow valve 34 from the increase rate of the opening corresponding to the first increase rate R1a to the increase rate of the opening corresponding to the second increase rate R1b. increase. That is, the controller 46 controls so as to change the increase speed of the opening of the second flow valve 34 in the first period. Not only one but two or more change points of the opening degree may be provided to correspond to the change points of the non-linear increase curve in the rising process X1 of the urine flow rate.
Since the detection sensor 144 can detect the urine flow, it is possible to synchronize the timing of the user's urination start and the timing of the start of the urine dilution water discharge mode. Therefore, it is possible to synchronize the timing of the rising process X1 of the flow rate of the user's urine flow and the timing of the increase of the water discharge flow rate R1 and achieve water saving of the flush water volume discharged in the urine dilution water discharge mode, More efficient urine dilution can be achieved.

  As shown in FIG. 16, since the user's urination starts from time t1, the urine concentration in the drainage trap pipeline 14 rises. At this time, since the urine dilution spouting of the spouting flow rate R1 is performed, the urine concentration in the drainage trap pipeline 14 is suppressed lower than in the case where the urine dilution spouting mode is not performed. In addition, since the spout water flow rate R1 is increased in the first period in accordance with the increase in the flow rate of the urine flow during the increase process X1, the increase in the urine concentration in the drainage trap pipeline 14 is suppressed.

  The time at which it is assumed (assumed) that the flow rate of the urine flow increases to the maximum level X2 and the urine concentration in the drainage trap pipeline 14 increases to the maximum level is set to time t2. Also in FIG. 17, the time change of the flow rate of the standard urine flow is shown in comparison with the time change of the water discharge flow rate. In the first period, it is assumed that the flow rate of the standard user's urine flow has not reached the maximum level X2 of the second period and is in the ascending phase X1 lower than the maximum level X2. Therefore, corresponding to this assumption, the water discharge flow rate R1 in the first period is made smaller than the water discharge flow rate R2, and water saving in the amount of flush water discharged in the urine dilution water discharge mode is achieved and urine dilution is efficiently realized. can do.

  The first period is mainly set to include the period of the rising process X1 of the urine flow rate. By the spouting water from the second spout 76 within the period of the first period, the urine concentration of the flush water flowing down to the drainage trap pipeline 14 and the horizontal draw pipe 3 is reduced. The first period is set in the range of 2 seconds to 7 seconds, preferably in the range of 2 seconds to 5 seconds, and more preferably 3 seconds. The controller 46 ends the first period when a predetermined time has elapsed.

  The controller 46 determines that the second period following the first period starts when the first period ends in the urine dilution water discharge mode, and starts measurement of the second period. The detection sensor 144 continues the detection state. The controller 46 continues the opening of the second on-off valve 36 in the second period following the first period to continue the water discharge. The second period is a period from time t2 to time t3 where it is assumed that the urine flow starts decreasing from the maximum level X2. During the second period, it is assumed that the flow rate of the standard user's urine flow mainly reaches the maximum level X2 and the state of the maximum level X2 continues. Therefore, corresponding to this assumption, the water discharge flow rate R2 in the second period is set to the maximum level larger than the water discharge flow rate R1 or the water discharge flow rate R3 and water saving of the flush water volume discharged in the urine dilution water discharge mode is achieved. Urine dilution can be realized efficiently.

  The second period is mainly set to include the period of the maximum level X2 of the urine flow rate. By the spouting water from the second spout 76 within the period of the second period, the urine concentration of the washing water flowing down to the drainage trap pipeline 14 and the horizontal pulling pipe 3 is reduced. The second period is set in the range of 1 second to 4 seconds, preferably in the range of 2 seconds to 3 seconds. The controller 46 ends the second period when a predetermined time has elapsed.

  In the second period, the controller 46 controls the second flow rate valve 34 to discharge water so that the water discharge flow rate R2 becomes the maximum water discharge flow rate in the urine dilution water discharge mode. In the second period, the water discharge flow rate R2 is maintained constant, but it is sufficient if the water discharge of the water discharge flow rate R2 is performed in at least a part of the second period. In the second period, the controller 46 may slightly change the opening degree of the second flow rate valve 34 to change the water discharge flow rate.

  As shown in FIG. 17, in the second period, the flow rate of the urine flow is approximately constant at the maximum level X2. Therefore, it is suppressed that the urine concentration in the drainage trap pipeline 14 is raised in the second period. Further, since urine dilution spouting of the spouting flow rate R2 is performed, the urine concentration in the drainage trap pipeline 14 is suppressed to be lower than in the case where the urine dilution spouting mode is not performed.

  When the second period ends in the urine dilution water discharge mode, the controller 46 determines that the third period following the second period starts, and starts measurement of the third period. At the start of the third period, the detection sensor 144 continues the detection state. The controller 46 continues water discharge until time t4 when the detection sensor 144 is in the non-detection state in the third period following the second period. The third period is a period from time t3 to time t4. The user terminates urination at time t4 in which the predetermined time has continued from time t3 in the third period.

  The controller 46 causes the second on-off valve 36 to be opened for the third period to continue the spouting from the second spout 76. The controller 46 controls the second flow rate valve 34 to cause water discharge so that the water discharge flow rate R3 in the third period is smaller than the water discharge flow rate R2 in at least a part of the second period. The controller 46 controls the second flow rate valve 34 to cause water discharge so as to reduce the water discharge flow rate R3 within the third period. The controller 46 controls the opening degree of the second flow rate valve 34 to decrease continuously. Within the period of the third period, the spouting flow rate of the urine diluted spouting spouted from the second spout 76 is decreased without increasing. When the water discharge flow rate is decreased without increasing, it also includes the case where the water discharge flow rate is gradually decreased, or the case where the water discharge flow rate is decreased stepwise including the portion kept constant and the reduced portion.

  The controller 46 changes the decrease rate of the water discharge flow rate per unit time from the first decrease rate R3a to the second decrease rate R3b for the water discharge flow rate R3 in the third period, and the first decrease rate R3a is the second decrease rate R3b The second flow valve 34 is controlled to be larger than the above. In the third period, the controller 46 changes the decrease rate of the opening of the second flow valve 34 from the decrease rate of the opening corresponding to the first decrease rate R3a to the decrease rate of the opening corresponding to the second decrease rate R3b. Reduce. That is, the controller 46 performs control so as to change the decrease rate of the opening of the second flow valve 34 in the third period. The change point of the decrease rate of the opening degree may be provided not only one but two or more so as to correspond to the change point of the non-linear decrease curve in the falling step X3 of the flow rate of the urine flow.

  In the third period from time t3 to time t4, it is assumed that the flow rate of the standard user's urine flow is lower than the maximum level X2 and is in the descending process X3 until urination ends. Therefore, corresponding to this assumption, the water discharge flow rate R3 in the third period is made smaller than the water discharge flow rate R2, and water saving in the amount of flush water discharged in the urine dilution water discharge mode is achieved, and urine dilution is efficiently realized. can do.

  The third period is mainly set to include the period of the descending process X3 of the urine flow rate. By the spouting water from the second spout 76 within the period of the third period, the urine concentration of the flush water flowing down to the drainage trap pipeline 14 and the horizontal draw pipe 3 is reduced. The third period ends when the detection sensor 44 is in the non-detection state, but as a modification, the third period is in the range of 10 seconds to 30 seconds, preferably in the range of 10 seconds to 20 seconds, and more preferably 14 seconds If the set period has elapsed, the controller 46 determines that the detection sensor 144 is in the non-detection state, and performs control to terminate the water discharge from the second water discharge port 76. Good.

  As shown in FIG. 16, in the third period, the flow rate of the urine flow is in the descending phase X3 and is smaller than the maximum level X2. In the third period, even if the water discharge flow rate R3 is decreased, it is suppressed that the urine concentration in the drainage trap pipeline 14 is increased. In addition, the urine concentration in the drainage trap pipeline 14 is reduced by the spouting of the spouting flow rate R3 according to the decrease in the flow rate of the urine flow. Further, since urine dilution spouting of the water discharge flow rate R3 is performed, the urine concentration in the drainage trap pipeline 14 is suppressed to be lower than in the case where the urine dilution spouting mode is not performed.

  As a comparative example, FIG. 16 shows the temporal change of the urine concentration of the flush water in the drainage trap pipeline 14 when only the user's urination is performed without the urine dilution water spouting mode being executed. After time t1, the urine dilution water discharge mode is not executed. During the first period, the urine concentration of the wash water rises to almost 100%. After the time t2, the flush water in the drain trap pipe 14 is almost replaced with the urine of the user until the main flush water discharge mode is executed, and the urine concentration of the flush water is approximately 100%.

  As a comparative example, FIG. 16 also shows the temporal change of the urine concentration of the flush water in the drainage trap pipeline in the case of executing the urine dilution and spouting mode in which the spouting flow rate is constant. In the urine dilution water discharge mode of this comparative example, urine dilution water discharge of a constant water discharge flow rate is discharged from the second water discharge port 76 from time t1 to time t4. Thereby, the increase in the urine concentration in the drainage trap pipeline 14 can be suppressed. However, in the first half of the first period and the second half of the third period, waste water that does not contribute to urine dilution or hardly contributes to urine dilution is consumed. Therefore, according to the urine dilution water discharge mode of the comparative example, it is not possible to achieve water saving of the amount of flush water discharged in the urine dilution water discharge mode, and furthermore, it has not been possible to realize urine dilution efficiently.

  From time t4 until time t5 when the user leaves the front of the bowl 6, the user prepares to wear while standing in front of the bowl 6, and prepares to leave the front of the toilet body 2. The time t5 is set as the time when an average adult wearing time is assumed to have elapsed from the time t4 when an average adult user wears clothes and is ready to leave. Such clothes wearing time is not included in the third period.

  The controller 46 terminates the urine dilution water spouting mode when the detection sensor 144 is in the non-detection state, suppresses unnecessary consumption of washing water in the urine dilution water spouting mode, and the drainage trap pipeline 14 and sideways. This flush discharge mode is executed to sufficiently wash the draw pipe 3 and to suppress the generation of urinary stones thereafter. When the controller 46 completes the execution of the main flush water discharge mode, the detection sensor 144 is put in a standby state. The controller 46 starts the control operation for each use cycle when the detection sensor 144 detects the user's urine flow again.

  Usually, it is assumed that the flow rate of the urine flow due to the user's urination gradually increases from the start of urination and gradually decreases in the second half of the urination after reaching the maximum flow rate. Therefore, according to the urinal 101 according to the second embodiment of the present invention described above, the controller 46 starts water discharge at the beginning of the first period after the detection sensor 144 is in the detection state, and continues to the first period. The water discharge is continued in the second period, the water discharge is continued until the detection sensor is in the non-detection state in the third period following the second period, and the second flow rate valve 34 is controlled to perform at least one of the second periods. The water discharge is performed so that the water discharge flow rate in the third period is smaller than the water discharge flow rate in the period of part. Therefore, according to the second embodiment of the present invention, in the third period before the detection sensor 144 is in the non-detection state, the controller 46 performs at least a part of the second period according to the decrease in the flow rate of urine flow. The water discharge is performed so that the water discharge flow rate in the third period is smaller than the water discharge flow rate in the period Therefore, according to the second embodiment of the present invention, it is possible to achieve water saving of the amount of flush water spouted in the urine dilution spout mode according to the reduction of the flow rate of urine flow in the second half of urination, and to efficiently carry out urine dilution. It can be realized.

  Furthermore, according to the urinal 101 according to the second embodiment, since the urine detection sensor 144 detects the urine flow, the timing at which the user urinates can be measured more accurately. Therefore, according to the second embodiment of the present invention, it is possible to more reliably achieve water saving of the amount of flush water spouted in the urine dilution spouting mode, and to realize more efficient urine dilution. The effects of the urinal 101 according to the other second embodiment are also substantially the same as the effects of the urinal 1 of the first embodiment, so the description will be omitted.

DESCRIPTION OF SYMBOLS 1 urinal 2 toilet bowl 3 side pulling piping 4 automatic cleaning unit 6 bowl part 7 front face 8 storage room 10 drainage port 12 eyelet 14 drainage trap pipeline 14a downfall pipeline 14b pipeline 14c uplift pipeline 14d common wall 14e longitudinal direction Width 14f Width of lower end 14g Width of upper end 15 Drain socket 16 Main water supply pipe 16a Main water supply line 18 Water stop valve 20 First water supply pipe 20a First water supply line 22 Second water supply pipe 22a Second water supply Route 24 Pipe joint 26 First flow valve 28 First on-off valve 30 Spreader 32 First water discharger 34 Second flow valve 36 Second on-off valve 38 Second water discharger 40 Check valve 42 Shelf 43 Releasing bacteria water unit 44 Detection sensor 46 Controller 48 Bowl surface 48a Front part 48b Left end 48c Right end 48d Upper end 50 Exterior cover 52 Spreader main part 52a Mounting hole 54 Nozzle Material 56 first water flow passage 56a upstream water flow passage 56b downstream water flow passage 58 second water flow passage 60 first water discharge port 62 attachment portion 64 nozzle portion 68 water flow passage 72 water flow passage 76 second water discharge port 101 urinal 144 detection sensor A predetermined width D horizontal centerline K floor surface Q1 first predetermined flow Q2 second predetermined flow R1 spouting flow rate R1a increasing rate R1b increasing rate R2 spouting flow rate R3 spouting flow rate R3a decreasing rate R3b decreasing rate t0 Time t1 time t2 time t3 time t4 time t5 time U urinal W wall surface W1 washing water W2 washing water X bacteria X1 rising process X2 maximum level X3 falling process Y environment area Z urease enzyme

Claims (7)

A urinal for washing a bowl surface with the flush water discharged,
A bowl portion which forms the bowl surface to receive urination and which forms a drain at the bottom thereof;
A urinal body provided with a drainage trap in communication with the drainage port of the bowl portion;
A water discharger for discharging wash water to the bowl surface;
A detection sensor that detects the presence or absence of the user using the urinal body or the urine flow that the user urinates into the urinal body;
A flow control device capable of changing the flow rate of water discharge from the water discharger;
A control unit that controls the discharge of wash water by the water discharge unit;
The control unit executes a urine dilution water discharge mode in which water discharge is performed from the water discharge unit while the detection sensor is in the detection state,
In the urine dilution water discharge mode, the control unit starts water discharge at the beginning of the first period after the detection sensor is in the detection state, and continues water discharge in the second period following the first period, and In the third period following the second period, water discharge is continued until the detection sensor is in the non-detection state, and the flow rate adjustment device is controlled to further control the flow rate of water discharge in at least a part of the second period. A urinal characterized by discharging water so that the water discharge flow rate in 3 periods becomes small.   The urinal according to claim 1, wherein the control unit controls the flow rate adjustment device to discharge water so as to decrease the flow rate of water within the third period.   The control unit changes, from the first reduction rate to the second reduction rate, the reduction rate of the water discharge flow rate per unit time with respect to the water discharge flow rate in the third period, and the first reduction rate is larger than the second reduction rate. The urinal according to claim 2, wherein the flow control device is controlled to be   4. The water control apparatus according to claim 1, wherein the control unit controls the flow rate adjustment device to perform water discharge so that the water discharge flow rate in the first period is smaller than the water discharge flow rate in at least a part of the second period. Urinal according to any one of the preceding claims.   The urinal according to claim 4, wherein the control unit controls the flow rate adjustment device to perform water discharge so as to increase the water discharge flow rate during the first period.   The control unit changes the increase rate of the water discharge flow rate per unit time from the first increase rate to the second increase rate with respect to the water discharge flow rate in the first period, and the second increase rate is larger than the first increase rate. The urinal according to claim 5, wherein the flow control device is controlled to be   The urinal according to any one of claims 1 to 6, wherein the detection sensor is a urine detection sensor that detects urination to the urinal body.