JP2019027192A - urinal - Google Patents

Abstract

To provide a urinal capable of suppressing from generating urinary stone in a relatively short time due to organic dirt of bio-film contained in urine in washing water.SOLUTION: Disclosed urinal comprises: a bowl part forming the bowl surface; a drain trap communicating with a drain port of the bowl part; a water discharge part for discharging washing water to the bowl surface; a detection sensor; and a control unit for controlling the discharge of washing water from the water discharge part. The control unit has three modes; i.e. a main flushing discharge mode in which the water discharge part is controlled to discharge the washing water after the detection sensor has terminated the detection of use, an organic dirt suppression discharge mode in which the water discharge part is controlled to discharge washing water for suppressing formation of organic dirt containing bio-film in a lateral delivery pipe connected to the downstream of the drain trap on the basis of a predetermined schedule, and a urine dilution discharge mode in which the water discharge part is controlled to discharge the washing water while the detection sensor is detecting use by a user. In the organic dirt suppression discharge mode, the amount of the discharged washing water is constant every time.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a urinal, and more particularly, to a urinal that discharges in response to urination.

  Conventionally, as described in Patent Document 1, the control unit of the urinal is executed after execution of the first cleaning mode in which the urine collected in the drain trap is replaced with cleaning water, and the first cleaning mode. The second cleaning mode is provided, and the controller executes the second cleaning mode to wash out the waste water in the first cleaning mode and suppress the generation of urinary stones in the horizontal pipe. .

Japanese Patent No. 5455004 JP 2001-303639 A

Until now, urine stones formed in drainage traps of urinals and horizontal pipes downstream of drainage traps have been thought to be produced in a relatively long cycle of about 2 hours due to bacterial activity. .
However, as a result of intensive studies, the present inventors have found a new finding that urine stones are generated even in a very short time of about several seconds in an environment where a biofilm is formed.

Based on these findings, when a biofilm is formed in a small-volume drain trap, urinary stones are generated and attached in a few seconds, even if the urine concentration temporarily increases during urination. I found out.
Further, since the same phenomenon occurs in the horizontal piping, urine stones are generated and attached even when cleaning water having a relatively high urine concentration flows into the horizontal piping.

Furthermore, with the recent demand for water saving of washing water, a water saving drain trap having a relatively small volume has been proposed.
In such a water-saving drain trap, the wash water in the drain trap is replaced by the user's urination, and the urine concentration in the drain trap tends to be high.
Therefore, based on the above-mentioned new knowledge, in drain traps, for example, water-saving drain traps, it is an important issue to suppress the occurrence of urinary stones in drain traps and horizontal pipes at an early stage.

  Therefore, the present invention solves the problems of the prior art as described above, that is, the object of the present invention is to remove urinary stones in a relatively short time due to organic soil containing biofilm in the urine in the wash water. It is providing the urinal which can suppress producing.

The invention according to claim 1 is a urinal that drains into a horizontal drain pipe for drainage, wherein a bowl surface that receives urine is formed and a drain port is formed at the bottom thereof, and a drain port of the bowl unit A drain trap that communicates with the bowl, a water discharge part that discharges wash water to the bowl surface of the bowl part, a detection sensor that detects use of a user's urinal, and a control part that controls discharge of the wash water by the water discharge part And the control unit is configured to perform a main cleaning water discharge mode for discharging water from the water discharge unit after the detection sensor no longer detects use by the user, and the cleaning water from the water discharge unit based on a set schedule. The organic dirt control water discharge mode that suppresses the formation of organic dirt including biofilm in the horizontal pipe connected to the downstream side of the drain trap and the detection sensor detects the user's use. The urine dilution water discharge mode for discharging water from the water discharge unit during the operation, and the amount of water discharged in the organic matter suppression water discharge mode is constant each time, thereby solving the above-described problem. .
According to the urinal of the invention according to claim 1 configured as described above, by executing the organic matter suppression water discharge mode, it is possible to suppress the growth of bacteria that generate biofilms in the drain trap and the horizontal pipe, Formation of organic dirt including a film can be suppressed. In addition, even if organic matter contamination including biofilm is formed in the drain trap and the horizontal pipe, according to the urinal of the invention according to claim 1, by executing the organic matter suppression water discharge mode, The dirt can be cleaned based on a set schedule.
Furthermore, even if organic matter contamination including biofilm is formed in the drainage trap and the horizontal pipe, according to the urinal of the invention according to claim 1, urination is performed by executing the urine dilution spout mode. It is possible to reduce the urine concentration of the cleaning water in the drainage trap and the horizontal pipe from when the cleaning water discharging mode is executed. Therefore, it is possible to suppress urine in the wash water from generating urine stones in a relatively short time due to organic contamination.
Furthermore, according to the urinal of the invention according to claim 1, when the urine dilution water discharge mode is executed, the urine concentration of the wash water in the drain trap is reduced by urine dilution when the main wash water discharge mode is executed. Has been lowered. Therefore, by executing the main cleaning water discharge mode, even if urine in the cleaning water in the drain trap at the time of execution flows to the upstream side of the horizontal pipe, the urine concentration of the cleaning water remaining in the horizontal pipe is reduced. The urine in the wash water can be prevented from generating urinary stones.
Therefore, according to the urinal of the invention according to claim 1, urine in the wash water contains biofilm in the drain trap and the horizontal pipe by combining the organic matter suppression water discharge mode and the urine dilution water discharge mode. This can suppress the formation of urinary stones.
In addition, since the amount of water used in the organic dirt suppression water discharge mode is constant every time, it is possible to reliably suppress the accumulation of organic dirt in the trap and the horizontal pipe regardless of the use conditions.

The invention according to claim 2 is characterized in that, in addition to the configuration of the urinal described in claim 1, the instantaneous flow rate of water discharged from the water discharge unit in the urine dilution water discharge mode is the water discharge unit in the organic matter suppression water discharge mode. The problem mentioned above is solved by being smaller than the instantaneous flow rate of water discharged from the water.
According to the urinal of the invention according to claim 2 configured as described above, in addition to the effect of the invention according to claim 1, urine in the drain trap during urination is transferred to the horizontal pipe in the urine dilution spout mode. When flowing in, it is possible to suppress the urine from flowing backward to the upstream side of the horizontal pipe due to the relatively small instantaneous flow rate of the inflow. Thereby, it is possible to suppress the occurrence of urine stones on the upstream side of the horizontal pipe. In addition, the instantaneous flow rate of water discharge in the organic matter suppression water discharge mode is higher than the instantaneous flow rate of water discharge in the urine dilution water discharge mode. it can. Therefore, by combining the organic matter suppression water discharge mode and the urine dilution water discharge mode, it is possible to further suppress the urine in the wash water from generating urine stones due to the organic matter contamination including the biofilm in the horizontal pipe.

In the invention according to claim 3, in addition to the configuration of the urinal described in claim 1 or 2, the instantaneous flow rate of water discharged from the water discharge unit in the main washing water discharge mode is the urine dilution water discharge mode. The problem mentioned above is solved by being larger than the instantaneous flow rate of water discharged from the water discharger.
The instantaneous flow rate of water discharge in the main cleaning water discharge mode is desirably a flow rate that can secure the cleaning performance of the bowl surface. On the other hand, even if the instantaneous flow rate of the water discharge in the urine dilution water discharge mode is made larger than the instantaneous flow rate of the water discharge in the main washing water discharge mode, it is difficult to contribute to a decrease in the urine concentration.
Therefore, according to the urinal of the invention according to claim 3 configured as described above, in addition to the effect exhibited by the invention according to claim 1 or claim 2, the cleaning performance of the bowl surface in the main cleaning water discharge mode is ensured. At the same time, it is possible to suppress wasted water used in the urine dilution water discharge mode.

The invention according to claim 4 is characterized in that, in addition to the configuration of the urinal described in any one of claims 1 to 3, the amount of water discharged from the water discharge section in the organic matter dirt suppression water discharge mode is By exceeding the amount of water discharged from the water discharge section in the main cleaning water discharge mode, the above-described problem is solved.
When water is discharged in combination with the main cleaning water discharge mode, the organic matter suppression water discharge mode, and the urine dilution water discharge mode, the total of all water discharge modes is compared to the flow rate discharged in the urine dilution water discharge mode, which increases with the number of times the user uses. In order to suppress the increase in the water discharge flow rate, for example, adjustment is performed by reducing the amount of water discharged in the organic matter suppression water discharge mode. At this time, the amount of water discharged from the water discharge portion as one time in the organic matter suppression water discharge mode is set to be equal to or more than the amount of water discharged from the water discharge portion as one time in the main cleaning water discharge mode.
Thereby, according to the urinal of the invention which concerns on Claim 4, the water level of the wash water which flowed into the horizontal pipe in the organic matter suppression water discharge mode is the level of the wash water which flowed into the horizontal pipe in the main water discharge mode Because of the higher frequency, the organic dirt containing biofilm generated near the water level surface of the horizontal piping is washed away by the organic dirt water discharge mode when the main washing water discharge mode is executed, which is executed more frequently than the organic dirt suppression water discharge mode. Can do. Therefore, it is possible to further suppress the urine in the washing water from generating urinary stones in a relatively short time due to organic contamination in the horizontal piping.

According to a fifth aspect of the present invention, in addition to the configuration of the urinal described in any one of the first to fourth aspects, the control unit suppresses organic contaminants after the main cleaning water discharge mode is completed. The above-described problem is solved by executing the organic matter suppression water discharge mode when the water discharge execution time has elapsed.
According to the urinal of the invention concerning Claim 5 comprised in this way, in addition to the effect which invention based on any one of Claims 1 thru | or 4, there exists organic matter after this washing | cleaning water discharge mode is complete | finished By executing the organic soil suppression water discharge mode when the soil suppression water discharge execution time has elapsed, if the urinal has not been used until the organic soil suppression water discharge execution time elapses after the main cleaning water discharge mode has been completed, Since the grown organic dirt can be washed away, the growth of dirt in the drain trap can be further suppressed.
Moreover, since it is possible to prevent the seal water from being cut off due to natural drying that occurs when the urinal is not used for a long time, it is possible to prevent the odor from leaking into the room.

The invention according to claim 6 solves the above-described problem by adding the construction of the urinal described in claim 5 and selecting the organic dirt suppression water discharge execution time from a plurality of predetermined times. Is.
According to the urinal of the invention concerning Claim 6 comprised in this way, in addition to the effect which the invention which concerns on Claim 5, there exists organic matter dirt suppression water discharge execution time by being freely selectable from a plurality of predetermined times. In addition, since it is possible to select an optimal organic matter suppression water discharge execution time according to the installation location, it is possible to achieve both the suppression of contamination accumulation and water saving.

According to a seventh aspect of the invention, in addition to the configuration of the urinal described in the fifth aspect, when the organic dirt suppression water discharge determination time is shorter than the organic dirt suppression water discharge execution time after the main washing water discharge mode ends. If the urinal usage count has been more than a predetermined number of times since the previous execution of the organic dirt suppression water discharge mode, the organic contamination suppression water discharge mode is executed and the previous organic dirt suppression water discharge mode is executed. If the number of times the urinal has been used is less than the predetermined number of times, the above-mentioned problem is solved by executing the organic matter suppression water discharge mode when the organic matter suppression water discharge execution time has elapsed.
According to the urinal of the invention concerning Claim 7 comprised in this way, in addition to the effect which the invention which concerns on Claim 5 show | plays, the organic matter stain | pollution | contamination shorter than organic stain | pollution | contamination suppression water discharge execution time after this washing | cleaning water discharge mode is complete | finished If the urinal usage count has been more than the specified number of times since the previous organic dirt suppression water discharge mode was executed when the suppression water discharge determination time has elapsed, the organic dirt suppression water discharge mode is executed and the previous organic dirt suppression water discharge is performed. If the number of urinal usages after executing the mode is less than the predetermined number of times, by executing the organic matter suppression water discharge mode when the organic matter suppression water discharge execution time has elapsed, the organic contamination suppression water discharge mode is set according to the frequency of use. As a result, it is possible to more reliably suppress the accumulation of dirt in the drain trap and the building piping.

According to an eighth aspect of the present invention, in addition to the configuration of the urinal described in any one of the first to fourth aspects, the organic dirt suppression water discharge mode is executed at regular intervals. It solves the aforementioned problems.
According to the urinal of the invention according to claim 8 configured as described above, in addition to the effect exerted by the invention according to any one of claims 1 to 4, the organic matter suppression water discharge mode is By executing it at regular intervals, the inside of the drain trap is surely replaced regardless of the frequency of use, so that the growth of organic dirt in the drain trap is suppressed, and dirt in the drain trap and building piping is more reliably prevented. Deposition can be suppressed.

According to a ninth aspect of the present invention, in addition to the configuration of the urinal described in any one of the first to eighth aspects, the organic matter contamination-suppressing water discharge mode is intermittently executed. It solves the problem.
According to the urinal of the invention according to claim 9 configured as described above, in addition to the effect exerted by the invention according to any one of claims 1 to 8, the organic matter suppression water discharge mode is By executing intermittently, organic dirt in the building piping is less likely to remain compared to when the organic dirt suppressing water discharge mode is performed only once, so that accumulation of dirt in the building pipe can be further suppressed. .

  ADVANTAGE OF THE INVENTION According to this invention, the urinal which can suppress that the urine in washing water produces a urolith in a comparatively short time by the organic substance dirt containing a biofilm can be provided.

A part of the urinal drain trap line before the user urinates is shown enlarged, and urine stones are generated even in a very short time in an environment where organic matter contamination including biofilm is formed It is a figure explaining new knowledge. After the user urinates, the drain trap line is filled with urine until the urinal is washed, and it is extremely short in an environment where organic matter contamination including biofilm is formed. It is a figure explaining the new knowledge that urine stones generate even in time. The urinal cleaning operation is performed and the urine in the drain trap pipe is replaced with new cleaning water, and even in a very short time in an environment where organic dirt including biofilm is formed. It is a figure explaining the new knowledge which urine stone occurs. After the user's urination, the drain trap conduit shown in FIG. 1A is almost filled with wash water having a relatively high urine concentration, and in an environment where organic soil including biofilm is formed. It is a figure explaining the new knowledge that a difference arises in the generation amount of urine stones by the difference in the urine concentration of the washing water in a drain trap pipe and a horizontal piping in the period. FIG. 2A shows a state after the main cleaning operation is performed on the drain trap pipe shown in FIG. 2A. In an environment where organic soil including biofilm is formed, the drain trap pipe and the horizontal pull are drawn in the same period. It is a figure explaining the new knowledge that a difference arises in the generation amount of urine stones by the difference in the urine concentration of washing water in piping. After the user's urination, the drain trap conduit shown in FIG. 1A is almost filled with wash water having a relatively low urine concentration, and in an environment where organic soil including biofilm is formed. It is a figure explaining the new knowledge that a difference arises in the generation amount of urine stones by the difference in the urine concentration of the washing water in a drain trap pipe and a horizontal piping in the period. FIG. 2C shows a state after the main cleaning operation is performed on the drain trap pipe, and in an environment where organic soil including biofilm is formed, the drain trap pipe and the horizontal pull are drawn in the same period. It is a figure explaining the new knowledge that a difference arises in the generation amount of urine stones by the difference in the urine concentration of washing water in piping. It is a figure which shows the thickness of the organic dirt with respect to the frequency | count of use for every urine density | concentration of the wash water in the drain trap pipe 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 drain trap pipe line shown in FIG. 1A. 4A shows a state in which the drain trap pipe is almost filled with wash water having a relatively high urine concentration, and urine stones are generated due to the difference in urine concentration of the wash water in the drain trap pipe and the horizontal pipe. It is a figure explaining the new knowledge that the mechanism of is different and a difference arises in the increase in the thickness of organic matter dirt. When high pH environment arises in a drain trap pipe as shown in Drawing 4B, it is a figure explaining that reaction which precipitates magnesium ammonium phosphate becomes dominant. It is a figure explaining the state which produced the crystalline urine stone with comparatively large particle diameter by magnesium ammonium phosphate by reaction as shown to FIG. 4C. 4A shows a state where the drain trap pipe is almost filled with wash water having a relatively low urine concentration, and urine stones are generated due to the difference in urine concentration of the wash water in the drain trap pipe and the horizontal pipe. It is a figure explaining the new knowledge that the mechanism of is different and a difference arises in the increase in the thickness of organic matter dirt. As shown in FIG. 4E, it is a diagram illustrating that the reaction for precipitating calcium phosphate is dominant in an environment where the pH increase in the drain trap pipe is suppressed to be relatively low. It is a figure explaining the state in which the calcium phosphate produced the amorphous urine stone with a comparatively small particle diameter by reaction as shown in FIG. 4F. The figure which shows the installation condition of the urinal which is 1st Embodiment of this invention. The schematic perspective view of the urinal which is 1st Embodiment of this invention. Side surface sectional drawing of the urinal which is 1st Embodiment of this invention. Schematic which shows the structure of the automatic washing unit of the urinal which is 1st Embodiment of this invention. The flowchart which shows operation | movement of a urinal in the urinal which is 1st Embodiment of this invention. The time chart which shows an actual motion in the urinal which is 1st Embodiment of this invention. In the urinal which is 2nd Embodiment of this invention, the flowchart which shows the operation | movement for every use which uses a urinal. The time chart which shows an actual motion in the urinal which is 2nd Embodiment of this invention. The urinal which is the 2nd Embodiment of this invention WHEREIN: The flowchart which shows operation | movement of organic substance dirt suppression water discharge mode.

<1. New mechanism of urine stone discovery discovered by the present inventor>
As a result of intensive research, the present inventors have found the following new finding that urine stones are generated even in a very short time in an environment where organic soil including biofilm is formed.

2. Description of the Related Art Conventionally, the mechanism of urine stone generation that pays attention to inorganic dirt such as urine stone is known as follows.
In this mechanism, after the user uses the urinal, urine remains in the drain trap pipe and the horizontal pipe, and general bacteria adhere to the retained urine.
In this general bacterial metabolic process, an enzyme called urease is excreted.
Urea in the urine is decomposed by this urease enzyme, and ammonia is generated.
When ammonia is dissolved in water, the pH in the liquid containing urine is increased and the solution 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 urine decreases, so these salts are contained in the urine fluid. It precipitates and adheres to the drain trap pipe and the horizontal pipe as urine stone.
It has been considered that the generation of urine stones of such inorganic soil progresses relatively slowly over a relatively long time of 2 hours or more.

  On the other hand, the present inventors newly paid attention to organic dirt different from inorganic dirt among dirt generated in the drain trap pipe and the horizontal pipe, and in an environment where organic dirt including biofilm is formed. In the study, urinary stones were found to be generated even in a very short time of several seconds.

As shown in FIGS. 1A to 1C, the mechanism of generation of urinary stone U in a short time is based on organic matter contamination V including a biofilm, and will be described as follows.
The organic soil V is formed by a composite of biofilms such as EPS (Extracellular Poly Succharide) released during the growth of bacteria X such as general bacteria, and proteins contained in urine. .
Such organic dirt V is known as slimming in the piping, and forms very viscous mucus.
In such a biofilm of organic dirt V, bacteria X attached to the drain trap T and the horizontal pipe HP generate a polysaccharide polymer outside the cell, and the cells are prevented from being detached by being wrapped in this. And is thought to develop.

In FIG. 1A, a part of the drainage trap T of the urinal before the user urinates to the urinal is shown in an enlarged manner.
The drain trap T shown in FIG. 1A is in a state after the user has continued to use the urinal many times.
The drain trap T stores the cleaning water discharged in the previous main cleaning water discharging mode.
Hereinafter, the state and reaction in the drain trap T are described in FIGS. 1A to 4G, but the state and reaction in the equipment piping downstream of the drain trap T such as the horizontal piping HP are substantially the same. It is also applied to the horizontal piping HP.

After the user uses the urinal, if a biofilm of organic dirt V is formed in the drain trap T, the bacteria X are generated and developed.
The biofilm forms a sponge-like internal structure, and easily retains bacteria X and ammonia (or ammonium ion NH ₄ ⁺ ) inside.
Bacterium X excretes urease enzyme, which decomposes urea in urine to generate ammonia (or ammonium ion NH ₄ ⁺ ).
Therefore, a large amount of ammonia (or ammonium ion NH ₄ ⁺ ) is present in the biofilm vicinity region.
Ammonia dissolves in the liquid in the vicinity of the organic dirt V to generate ammonium ions NH ₄ ⁺ , whereby the pH in the area in the vicinity of the organic dirt V rises to a relatively high value.
The pH of the high pH environment region Y in the vicinity of the organic soil V including the biofilm is 8 or more, preferably 9 or more, preferably 8 to 10 in range.

In FIG. 1B, in the urinal having the drain trap T in the state as shown in FIG. 1A, the inside of the drain trap T in a relatively short time until the user urinates and the cleaning operation of the urinal is performed. Is almost filled with urine.
When this urine touches or approaches the high pH environment region Y in the vicinity of the organic matter stain V, carbonates and phosphates of Ca and Mg contained in the urine are precipitated, and it is a very short time of about several seconds. The mechanism that urine stone U is generated was found.

In FIG. 1C, the urine in the drainage trap T is replaced with new flushing water after the urinal washing operation is performed from the state in which the drainage trap T is almost filled with urine as shown in FIG. 1B. It shows the state that was done.
Although the urine in the drain trap T is replaced with new washing water, the precipitated urine U remains adsorbed on the organic matter stain V.
Since the biofilm forms a sponge-like internal structure, the urine stone U is also easily held.
It has also been found that when the urinary stone U adheres, the bacteria X more easily adhere to the urine stone U itself, and the generation of the urinary stone U is further promoted.
In this way, it was found that urine stones were deposited on the organic matter V in a short time and urine stones U were laminated by the accumulation of washings for a short time each time.

  Based on such new knowledge, the present inventors suppress the operation of the mechanism that generates urine stones in a relatively short time when the washing water containing urine comes into contact with the biofilm, and The present invention invents a technique for suppressing the generation of urinary stones in the main pipe HP.

  Furthermore, the present inventors have conducted intensive research to determine the urine concentration of the cleaning water in the drain trap T and the horizontal pipe HP in the same period in an environment where organic soil including biofilm is formed. The following new findings were found that the difference in the amount of urinary stones generated due to the difference.

In FIG. 2A, in the urinal having the drain trap T as shown in FIG. 1A, the inside of the drain trap T is compared in a relatively short time until the user urinates and the cleaning operation of the urinal is performed. It shows a state almost filled with wash water with a high urine concentration.
When the wash water having a relatively high urine concentration touches or approaches the high pH environment region Y near the organic soil V, a relatively large amount of urine stone U is generated in a very short time of about several seconds.

As shown in FIG. 2B, the relatively large amount of urinary stone U is adsorbed to the organic contaminant V after the urinal cleaning operation is performed and the cleaning water in the drain trap T is replaced with new cleaning water. It will remain in the state.
As shown in FIG. 3, when the user urinates, a relatively high urine concentration of wash water flows into the drain trap T in this manner by repeating the use of the urinal. A large amount of urine stone U accumulates on the drain trap T, and the thickness of the organic dirt V is relatively increased.

On the other hand, in FIG. 2C, in the urinal having the drain trap T as shown in FIG. 1A, the inside of the drain trap T in a relatively short time until the user urinates and the cleaning operation of the urinal is performed. Shows a state of being almost filled with wash water having a relatively low urine concentration.
When this relatively low urine concentration wash water touches or approaches the high pH environment region Y in the vicinity of the organic contaminant V, urine stone U is generated in a relatively short time of about several seconds.
Thus, the knowledge that the amount of urine U generated depends on the urine concentration of the wash water in the drain trap T in the same amount of time every time after the user urinates until the urinal washing operation is performed. Was found.
Therefore, the knowledge which can suppress the precipitation amount of the urine stone U if the urine density | concentration of the washing water in the drain trap T can be reduced was also found.

As shown in FIG. 2D, the relatively small amount of urine stone U remains adsorbed on the organic dirt V after the urinal cleaning operation is performed.
As shown in FIG. 3, when the urine of the user is discharged, a relatively low amount of urine wash water flows into the drain trap T every time the urinal is used, so that a relatively small amount of urine. Since the stone U accumulates on the drain trap T, the thickness of the organic dirt V can be suppressed.
It has also been found that the difference in the urine concentration of the wash water in the drain trap T at each user's urination becomes a greater difference in the thickness of the organic soil V as the number of uses increases.

  Furthermore, the present inventors have conducted intensive research and found that the mechanism of urine stone generation differs depending on the urine concentration of the washing water in the drain trap T and the horizontal pipe HP, and the thickness of the organic matter V is increased. The following findings were found that a difference appears.

In FIG. 4A, the mechanism of the generation | occurrence | production of the organic substance stain | pollution | contamination V containing the biofilm in the drain trap T and the horizontal piping HP as shown to above-mentioned FIG. 1A is shown again.
As shown in the step (a) in FIG. 4A, the user's urine adheres to the drain trap T, and the bacteria X adhere to the urine and grow on the drain trap T.
As time passes and / or the number of times the urinal is used 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 dirt V is formed on the drain trap T.
Next, the process proceeds from step (b) to step (c).
As shown in step (c) in FIG. 4A, the biofilm is easy to retain bacteria X and ammonia (or ammonium ions NH ₄ ⁺ ) inside.
Bacteria X inside the biofilm discharges urease enzyme Z, which decomposes urea in urine and generates ammonia (or ammonium ion NH ₄ ⁺ ).
Thus, in a state before the user urinates to the urinal, a part of the urinal drain trap T is in a state where the organic dirt V as shown in FIG. 4A (c) is formed. .

As shown in FIG. 4B, when urine with a relatively high urine concentration and / or wash water flows into the drain trap T on which the organic dirt V as shown in FIG. 4A (c) is formed, the amount of urea is relatively large. Therefore, a relatively large amount of urea in the urine is decomposed by the urease enzyme Z, and a relatively large amount of ammonia is generated.
When these ammonia are dissolved in water, ammonium ions NH ₄ ⁺ are generated, and the pH in the region near the organic matter V is increased to a relatively high value.

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

As shown in FIG. 4D, magnesium ammonium phosphate produces crystalline urolith with a relatively large particle size.
FIG. 4D is an image obtained by a scanning electron microscope (SEM), and the display magnification is 2000 times.
As will be described later, this image is a photograph of organic dirt obtained by an experiment that reproduces the occurrence of organic dirt in the drain trap pipe and horizontal pipe of the urinal according to the embodiment of the present invention. .
By mixing such a urine with a relatively large particle size in the biofilm, the thickness of the urinary stone and the thickness of the organic dirt V are likely to increase.
The thickness of the organic matter stain V mainly containing the magnesium ammonium phosphate urine is more likely to be larger than the thickness of the organic matter stain V containing calcium phosphate urine stone, which will be described later.
As the urine concentration of the washing water in the drain trap T increases, the deposition rate of magnesium ammonium phosphate increases and the thickness of the organic matter stain V increases.

On the other hand, as shown in FIG. 4E, the case where urine and / or wash water having a relatively low urine concentration flows into the drain trap T in which the organic dirt V as shown in FIG. 4A (c) is formed will be described.
At this time, since the amount of urea is relatively small, the amount of urea in the urine where the urease enzyme Z is degraded is relatively small, and the generation of ammonia is relatively small.
Therefore, an increase in pH due to ammonium ions NH ₄ ⁺ generated by aqueous ammonia is suppressed to a relatively low level.

As shown in FIG. 4F, in an environment where the increase in pH is suppressed to be relatively low as shown in FIG. 4E, inorganic substances in the liquid containing urine, such as Ca ²⁺ , Mg ²⁺ , PO ₄ ^3−, etc. The reaction that causes the calcium phosphate to precipitate is dominant.
Calcium phosphate becomes a urinary stone component that is easily generated from urine fluid in an environment that is more neutral than the environment in which magnesium ammonium phosphate is easily generated from urine fluid.

As shown in FIG. 4G, calcium phosphate produces amorphous urolith with a relatively small particle size.
FIG. 4G is an image obtained by a scanning electron microscope (SEM), and the display magnification is 2003 times.
As will be described later, this image is a photograph of organic dirt obtained by an experiment that reproduces the occurrence of organic dirt in the drain trap pipe and horizontal pipe of the urinal according to the embodiment of the present invention. .
Calcium phosphate urolith is smaller than magnesium ammonium phosphate urolith.
By mixing such a urine stone having a relatively small particle diameter in the biofilm, the thickness of the urine stone and the thickness of the organic dirt V increase little by little.
When urine stone having a small particle size is the main component, the pace of increase in thickness is relatively slow, making it difficult to increase the thickness.
The lower the concentration of urine in the wash water flowing into the drain trap T, the greater the precipitation rate of calcium phosphate, and the more difficult it is to increase the thickness of the organic dirt V.

  Based on such new knowledge, the present inventors adjust the urine concentration of the wash water flowing into the drain trap T and suppress the thickness of urine stones adhering to the drain trap T and the horizontal pipe HP. Was invented.

<2. First Embodiment>
Based on FIG. 5 thru | or FIG. 10, the urinal 100 which is 1st Embodiment of this invention is demonstrated.

<2.1. Installation status of urinals>
First, the installation situation of the urinal 100 which is 1st Embodiment of this invention is demonstrated using FIG. 5 which is a figure which shows the installation situation of the urinal which is 1st Embodiment of this invention.
As shown in FIG. 5, the urinal 100 which is 1st Embodiment of this invention is installed in multiple numbers on the front side of the wall surface W of a building.
A horizontal drain pipe HP for drainage extending sideways while being slightly inclined downward is connected to the lower side of the back side of the wall surface W on which the urinal 100 is installed.
This horizontal pipe HP is further connected to the downstream vertical drain pipe VP.
Each of the urinals 100 is drained from a lower wall surface side of the urinal 100 through a wall surface W to a horizontal pipe HP installed on the back side of the wall surface W.

<2.2. Urinal structure>
Next, the structure of the urinal 100 which is 1st Embodiment of this invention is demonstrated using FIG. 6 thru | or FIG.
FIG. 6 is a schematic perspective view of a urinal according to the first embodiment of the present invention, FIG. 7 is a side sectional view of the urinal according to the first embodiment of the present invention, and FIG. It is the schematic which shows the structure of the automatic washing unit of the urinal which is embodiment.

  As shown in FIGS. 6 to 8, the urinal 100 is a self-cleaning device that automatically discharges the toilet body 110 made of earthenware and the cleaning water for cleaning the toilet body 110 to the toilet body 110. Unit 120.

A bowl portion 111 having a bowl surface 111a for receiving urine is formed on the front side of the toilet body 110, and in the upper region of the toilet body 110 on the wall surface W side of the bowl portion 111, an automatic cleaning unit 120 is provided. A storage chamber 112 for storing a part is formed.
Further, a drain port 111 b is formed at the bottom of the bowl portion 111 of the toilet body 110.
The toilet body 110 is further provided with a drain trap 130 which is a discharge portion for forming a sealed water therein, on the downstream side of the drain port 113.
The drain trap 130 communicates with the drain port 113.
A horizontal pipe HP is connected to the downstream side of the drain trap 130 via a drain socket S or the like that forms a flow path that penetrates the wall surface W.

The drain trap 130 is formed as a water-saving trap such that the volume of wash water stored so as to form sealed water in the drain trap 130 is 200 ml or less.
The drain trap 130 of such a water-saving trap can replace the wash water in the drain trap 130 with a smaller amount of wash water than a conventional drain trap having a volume of about 700 ml.
The volume of the water-saving drain trap 130 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.
Such a water-saving drain trap has a volume smaller than the urine volume of the user's urination, so the urine concentration of the wash water in the drain trap 130 tends to be high, and this urine is diluted. However, this is effective in suppressing urine stone adhesion in the drain trap 130 and the horizontal pipe HP.

As shown in FIG. 8, the automatic cleaning unit 120 includes a main water supply pipe 121 that forms a main water supply path 121a to which cleaning water is supplied from a water supply source (not shown) such as a water supply, and the main water supply pipe 121. A water stop cock 122 for watering, and a pipe joint 125 that is connected to the downstream end of the main water supply pipe 121 and is a branch part that branches the main water supply pipe 121 into a first water supply pipe 123a and a second water supply pipe 123b. And.
Further, the first water supply pipe 123a branched from the main water supply pipe 121 by the pipe joint 125 has a first instantaneous flow rate of the cleaning water passing through the inside water supply path (first water supply path 124a). A first constant flow valve 126a that adjusts to a predetermined instantaneous flow rate Q1 [liter / minute] is provided.
Further, a first on-off valve 127a for opening and closing the first water supply passage 124a is provided on the downstream side of the first constant flow valve 126a.
At the downstream end of the first water supply passage 124a on the downstream side of the first on-off valve 127a, a spreader 128 (water discharge portion) that is a part of a water discharge device that discharges cleaning water into the bowl portion 111 is provided. The first water discharge portion 128a of the spreader 128 is connected to the downstream end portion of the first water supply passage 124a.
In the present embodiment, the first predetermined instantaneous flow rate Q1 [liter / minute] is preferably 8 [liter / minute] to 17 [liter / minute], more preferably 8 [liter / minute] to 12 [liter / minute]. Liter / minute], more preferably 9 [liter / minute].

On the other hand, in the other second water supply pipe 123b branched from the main water supply pipe 121 by the pipe joint 125, the instantaneous flow rate of the washing water passing through the inside water supply path (second water supply path 124b) is changed. A second constant flow valve 126b for adjusting to a second predetermined instantaneous flow rate Q2 [liter / minute] lower than one predetermined instantaneous flow rate Q1 [liter / minute] is provided.
A second opening / closing valve 127b for opening / closing the second water supply passage 124b is provided on the downstream side of the second constant flow valve 126b.
A second water discharge portion 128b of the spreader 128 is connected to the downstream end portion of the second water supply passage 124b on the downstream side of the second on-off valve 127b.
In the present embodiment, the second predetermined instantaneous flow rate Q2 [liter / minute] is preferably set to 0.1 [liter / minute] to 8.0 [liter / minute], more preferably 0.8. It is set to 1 [liter / minute] to 0.6 [liter / minute], and more preferably 0.3 [liter / minute].
The instantaneous flow rate difference between the first predetermined instantaneous flow rate Q1 [liter / minute] and the second predetermined instantaneous flow rate Q2 [liter / minute] is preferably 1.0 [liter / minute] to 8.9. Set to [L / min].

  Next, on the downstream side of the second on-off valve 127b, an electrolyzed sterilizing water unit 129 is provided, and this electrolyzed microbial water unit 129 is an electrolytic cell (not shown) that generates electrolyzed microbial water. Is provided, and functions as an electro-release microbial water supply unit that supplies electro-release microbial water to the second water discharger 128b.

  Further, the automatic washing unit 120 is provided with a spreader 128 and a detection sensor 128c as a human body detection sensor for detecting the presence or absence of a user standing on the front side of the toilet body 110, and a detection signal transmitted from the detection sensor 128c. A controller 120A is provided as a control unit that receives and controls each operation of the first on-off valve 127a and the second on-off valve 127b based on a predetermined control program or the like.

The detection sensor 128c is an infrared human body detection sensor.
The detection sensor 128c is based on another detection sensor that detects use of the user's urinal (use state that the user is using), for example, a Doppler type sensor using microwaves, or use of the user's urinal. A flow rate detection sensor for detecting the flow of urine may be used.
Since the Doppler sensor can detect not only the user's human body but also the urine flow, the presence or absence of urination to the bowl surface can be specified more accurately.

The controller 120A incorporates a CPU, a memory, and the like, and can control other devices based on a predetermined control program or the like.
The controller 120A controls the opening and closing operation of the first on-off valve 127a, thereby controlling the start and end of water discharge from the first water discharge unit 128a in the main cleaning water discharge mode or the organic matter suppression water discharge mode described later.
The controller 120A controls the opening and closing operation of the second on-off valve 127b, thereby controlling the start and end of the urine dilution spouting mode described later from the second water spouting unit 128b or the discharging of the electrolyzed microbial water.

In the present embodiment, the first constant flow valve is used as a flow rate adjusting means for adjusting the instantaneous flow rates Q1 and Q2 of the cleaning water in the first water supply path 124a and the second water supply path 124b of the automatic cleaning unit 120. Although the form which employ | adopted each of 126a and the 2nd constant flow valve 126b is demonstrated, it is not restricted to these forms, For example, in addition to a constant flow valve, a flow sensor etc. are used and a wash water is made into appropriate flow volume. Other flow rate adjusting means for adjustment may be adopted, and the operation of the other flow rate adjusting means may be controlled by the controller 120A.
In addition, an electric valve with an adjustable opening degree may be provided in the flow path so that a plurality of instantaneous flow rates can be discharged from a single water discharge portion.

<2.3. Operation of urinal>
Then, operation | movement of the urinal 100 which is 1st Embodiment of this invention is demonstrated using FIG. 9 and FIG.
FIG. 9 is a flowchart showing the operation of the urinal in the urinal according to the first embodiment of the present invention, and FIG. 10 is a time chart showing the actual movement in the urinal according to the first embodiment of the present invention. is there.

  The controller 120A includes a urine diluted water discharge mode in which water is discharged from the second water discharge unit 128b during a predetermined period while the detection sensor 128c detects use of the user, and the detection sensor 128c detects use of the user. After that, the main cleaning water discharging mode for discharging water from the first water discharging unit 128a, and the cleaning water is discharged from the first water discharging unit 128a based on the set schedule, in the drain trap 130 and the horizontal pipe HP. An organic soil suppression water discharge mode that suppresses the formation of organic soil including biofilms.

<2.3.1. Operation after each use>
First, the operation | movement for every use of the urinal 100 which is 1st Embodiment of this invention is demonstrated using FIG. 9 and FIG.

While the urinal 100 is energized, the detection sensor 128c of the urinal 100 detects the use (step S100).
When the detection sensor 128c of the urinal 100 stands in front of the bowl portion 111, the detection sensor 128c detects use of the user and proceeds to step S101 (time t10 at this time; FIG. 10). reference).

<2.3.1.1. Urine dilution spout mode>
After time t10 has elapsed (that is, in step S101), the controller 120A opens the second on-off valve 127b.
As a result, water is discharged from the second water discharge portion 128b of the spreader 128 toward the bowl surface 111a of the bowl portion 111 at an instantaneous flow rate Q2.
Then, the process proceeds to step S102.

In step S102, it is determined whether or not the detection sensor 128c has detected use during the water discharge from the second water discharge unit 128b.
If use is detected, step S102 is repeated.
If no use is detected, the process proceeds to step S103.

When the detection sensor 128c no longer detects a human body (that is, in step S103), the controller 120A closes the second on-off valve 127b and terminates the water discharge from the second water discharge unit 128b.
Thereafter, the process proceeds to step S104 (the time at this time is set as time t11; see FIG. 10).

  As described above, Step S101, Step S102, and Step S103 are “time from detection of user's use until no use is detected”, in other words, “user urinates to bowl 111”. This is the “time during which the urine flowing into the drain trap 130 is diluted by discharging water while the water is being discharged”, and the execution of these three steps is referred to as a “urine dilution water discharging mode”.

<2.3.1.2. Main cleaning water discharge mode>
After time t11 has elapsed (that is, in step S104), the controller 120A opens the first on-off valve 127a.
Thereby, water is discharged from the first water discharge portion 128a of the spreader 128 toward the bowl surface 111a of the bowl portion 111 at an instantaneous flow rate Q1.
The water discharge time at this time is the main cleaning time Ta (for example, 3.3 seconds), and the time after the main cleaning time Ta is ended is time t12 (see FIG. 10).
And after time t12 progresses, it progresses to step S105.

This step S104 is a time “water is discharged from the first water discharge portion 128a of the spreader 128 after the use of the user is no longer detected”. In other words, “the bowl portion 111 is washed and the drain trap 130 is filled. The time during which step S104 is executed is referred to as “main cleaning water discharge mode”.
The amount of water used in the “main cleaning water discharge mode” (that is, the amount of water discharged from the first water discharge unit 128a) is about 0.5 liter.

In step S105, since the urinal 100 has been used once, 1 is added to the usage counter p (variable).
Then, the process proceeds to step S106.

<2.3.2. Organic dirt suppression water discharge mode>
In step S106, the use of the urinal 100 is detected again.
When the detection sensor 128c detects use of the urinal 100, the process returns to step S101.
When the detection sensor 128c does not detect the use of the urinal 100, the process proceeds to step S107.

In step S107, it is determined whether or not an organic contaminant suppression water discharge determination time Tb (for example, 1 hour) has elapsed since time t12.
If the organic dirt suppression water discharge determination time Tb has not elapsed from time t12, the process returns to step S106.
When the organic dirt suppression water discharge determination time Tb has elapsed from time t12 (the time at this time is t13; see FIG. 10), the process proceeds to step S108.

In step S108, it is determined whether or not the urinal use frequency counter p has reached a predetermined number P or more during the period from the execution of the previous organic matter suppression water discharge mode to the time t13.
When the urinal usage count p between the previous organic dirt suppression water discharge mode and the time t13 is equal to or greater than the predetermined number P, the process proceeds to step S109 (FIG. 10A). Pattern).
When the use frequency counter p of the urinal 100 is less than the predetermined number P from the previous execution of the organic matter suppression water discharge mode to the time t13, the process proceeds to step S110 (pattern (b) in FIG. 10). become).

In step S110, it is determined whether or not the organic matter suppression water discharge execution time Td (for example, 2 hours) has elapsed since time t12.
If the organic matter suppression water discharge execution time Td has not elapsed since time t12, the process returns to step S106.
If the organic dirt suppression water discharge execution time Td has elapsed from time t12 (the time at this time is set to t15; see FIG. 10B), the process proceeds to step S109.
In addition, the organic matter suppression water discharge execution time Td can be appropriately selected from a plurality of predetermined execution times.

In step S109, the controller 120A opens the first on-off valve 127a.
Thus, water is intermittently discharged from the first water discharge portion 128a of the spreader 128 toward the bowl surface 111a of the bowl portion 111 at an instantaneous flow rate Q1.
In step S109, the time from the start of water discharge to the end of water discharge (water discharge time) is defined as an organic contamination suppression water discharge time Tc (for example, 13.2 seconds).
Then, it progresses to step S111.

  In step S111, the usage counter p of the urinal 100 is reset to zero.

This series of step S106, step S107, step S108, step S109, and step S110 is “water discharge for suppressing the growth of bacteria that generate biofilms in the drain trap 130 and the horizontal pipe HP”. The execution is referred to as “organic matter suppression water discharge mode”.
That is, this “organic matter suppression water discharge mode” is the pattern (a) in FIG. 10 after the “main cleaning water discharge mode” is completed (use of the urinal 100 after the previous organic matter suppression water discharge mode is executed). In the case where the number of times is less than the predetermined number P), after the organic dirt suppression water discharge determination time Tc, the pattern of FIG. 10B (the number of times the urinal 100 is used since the previous organic dirt suppression water discharge mode is executed). In the case of the predetermined number of times P or more), it is executed after the organic dirt suppression water discharge execution time Td.
The amount of water used in the “organic matter suppression water discharge mode” (that is, the amount of water discharged from the first water discharge unit 128a) is constant each time, and the amount of water is a plurality of predetermined flow rates (for example, 1 liter, 2 liters). 4 liters).

<2.4. Effect>
The urinal 100 according to the first embodiment of the present invention thus obtained performs the growth of bacteria that generate biofilms in the drain trap 130 and the horizontal pipe HP by executing the organic matter suppression water discharge mode. It is possible to suppress the formation of organic soil including a biofilm. In addition, even if organic matter contamination including biofilm is formed in the drain trap and the horizontal pipe HP, according to the urinal 100, organic matter contamination is set by executing the organic matter suppression water discharge mode. It can be cleaned on a schedule.
Furthermore, even if organic matter contamination including biofilm is formed in the drain trap 130 and the horizontal pipe HP, according to the urinal 100, after the urine is discharged by executing the urine dilution spouting mode, It is possible to reduce the urine concentration of the cleaning water in the drain trap 130 and the horizontal piping HP until the cleaning water discharge mode is executed. Therefore, according to the urinal 100, it is possible to prevent urine in the wash water from generating urine stones in a relatively short time due to organic contamination.
Further, according to the urinal 100, the urine dilution water discharge mode is executed, so that the urine concentration of the wash water in the drain trap is lowered by the urine dilution when the main wash water discharge mode is executed. Therefore, even when the urine in the cleaning water in the drain trap 130 at the time of execution flows to the upstream side of the horizontal piping HP by executing the main cleaning water discharge mode, the urine concentration of the cleaning water remaining in the horizontal piping HP And urine in the wash water can be prevented from generating urinary stones.
Therefore, according to the urinal 100, the urine in the washing water is removed from the urine in the drainage trap 130 and the horizontal pipe HP by the organic dirt including the biofilm by combining the organic dirt control water discharge mode and the urine dilution water discharge mode. This can be suppressed.
In addition, since the amount of water used in the organic matter suppression water discharge mode is constant every time, it is possible to reliably suppress the accumulation of organic matter in the drain trap 130 and the horizontal pipe HP regardless of the use conditions.

  Further, in the urine dilution water discharge mode, when the urine in the drain trap 130 during urination flows into the horizontal pipe HP, the urine flows backward to the upstream side of the horizontal pipe HP because the instantaneous flow rate of the inflow is relatively small. It can suppress that it flows like. Thereby, it is possible to suppress the occurrence of urinary stones on the upstream side of the horizontal pipe HP. In addition, since the instantaneous flow rate of water discharge in the organic matter suppression water discharge mode is higher than the instantaneous flow rate of water discharge in the urine dilution water discharge mode, the horizontal pipe HP is reliably washed over a relatively wide area by water discharge in the organic matter suppression water discharge mode. Can do. Therefore, by combining the organic matter suppression water discharge mode and the urine dilution water discharge mode, it is possible to further suppress the urine in the wash water from causing urinary stones due to the organic matter contamination including the biofilm in the horizontal pipe HP.

  Further, it is possible to secure the cleaning performance of the bowl surface 111a in the main cleaning water discharge mode and to suppress the waste of the cleaning water used in the urine dilution water discharging mode.

  Furthermore, since the water level of the cleaning water that has flowed into the horizontal pipe HP in the organic dirt suppression water discharge mode is higher than the water level of the cleaning water that has flowed into the horizontal pipe HP in the main cleaning water discharge mode, the frequency of execution is reduced. Organic dirt including a biofilm generated in the vicinity of the water level surface of the horizontal pipe HP during execution of the main cleaning water discharge mode higher than the mode execution frequency can be washed away by the organic dirt water discharge mode. Therefore, it is possible to further suppress the urine in the wash water from generating the urinary stone in a relatively short time due to the organic matter contamination in the horizontal pipe HP.

Further, by executing the organic matter suppression water discharge mode when the organic dirt suppression water discharge execution time Td has elapsed from the end of the main cleaning water discharge mode, until the organic contamination suppression water discharge execution time Td has elapsed after the main cleaning water discharge mode has ended. In addition, when the urinal 100 is not used, the organic dirt that has grown in the drain trap 130 can be washed away, so that the growth of dirt in the drain trap 130 can be further suppressed.
Moreover, since it is possible to prevent the seal water from being cut off due to natural drying that occurs when the urinal 100 is not used for a long time, it is possible to prevent the odor from leaking into the room.

  Furthermore, since the organic matter contamination suppressing water discharge execution time Td can be selected from a plurality of predetermined times, the optimum organic material contamination suppressing water discharge execution time Td can be selected according to the installation location. Both water saving can be achieved.

  Furthermore, it is the number of times the urinal is used since the last organic matter suppression water discharge mode is executed when the organic matter suppression water discharge determination time Tb is shorter than the organic contamination suppression water discharge execution time Td after the main cleaning water discharge mode ends. When the urinal use frequency counter p is equal to or greater than the predetermined number P, the organic matter suppression water discharge mode is executed, and the urinal use frequency counter p after executing the previous organic contamination suppression water discharge mode is greater than the predetermined number P. If the amount is small, the organic matter suppression water discharge mode is executed according to the frequency of use by executing the organic matter suppression water discharge mode when the organic matter suppression water discharge execution time Td has elapsed. Accumulation of dirt in the HP can be suppressed.

  Furthermore, since the organic matter dirt suppression water discharge mode is intermittently executed, the organic matter dirt in the building pipe HP is less likely to remain compared to the case where the organic dirt suppression water discharge mode is performed only once. The accumulation of dirt inside can be suppressed.

<3. Second Embodiment>
Next, a urinal 200 that is a second embodiment of the present invention will be described with reference to FIGS. 11 to 13.
FIG. 11 is a flowchart showing the operation of each use of the urinal in the urinal according to the second embodiment of the present invention, and FIG. 12 shows the actual operation in the urinal according to the second embodiment of the present invention. FIG. 13 is a flow chart showing the operation of the organic matter suppression water discharge mode in the urinal according to the second embodiment of the present invention.
The urinal 200 according to the second embodiment of the present invention is different from the urinal 100 according to the first embodiment of the present invention in water discharge operation, and is common to the urinal 100 with respect to many elements. Detailed description is omitted, and only the reference numerals in the 200s are used for the last two digits.

<3.1. Operation after each use>
First, the operation | movement for every use of the urinal 200 which is 2nd Embodiment of this invention is demonstrated using FIG. 11 and FIG.

While the urinal 200 is energized, the detection sensor 228c of the urinal 200 detects the use (step S200).
Then, when the detection sensor 228c of the urinal 200 stands in front of the bowl portion 211, the detection sensor 228c detects the use of the user and proceeds to step S201 (at time t20 at this time; FIG. 12). reference).

<3.1.1. Urine dilution spout mode>
After time t20 has elapsed (that is, in step S201), the controller 220A opens the second on-off valve 227b.
As a result, water is discharged at an instantaneous flow rate Q2 from the second water discharger 228b of the spreader 228 toward the bowl surface 211a of the bowl 211.
Then, the process proceeds to step S202.

In step S202, it is determined whether or not the detection sensor 228c detects use during the water discharge from the second water discharge unit 228b.
If use is detected, step S202 is repeated.
If no use is detected, the process proceeds to step S203.

When the detection sensor 228c no longer detects a human body (that is, in step S203), the controller 220A closes the second on-off valve 227b and terminates the water discharge from the second water discharge unit 228b.
Thereafter, the process proceeds to step S204 (the time at this time is set as time t21; see FIG. 12).

  As described above, step S201, step S202, and step S203 are “time from detection of use by the user until no use is detected by the user”, in other words, “the user urinates to the bowl unit 211. This is the “time during which the urine flowing into the drain trap 230 is diluted by discharging water while the water is being discharged”, and the execution of these three steps is referred to as the “urine dilution water discharging mode”.

<3.1.2. Main cleaning water discharge mode>
After time t21 has elapsed (that is, in step S204), the controller 220A opens the first on-off valve 227a.
Thereby, water is discharged at an instantaneous flow rate Q1 from the first water discharge portion 228a of the spreader 228 toward the bowl surface 211a of the bowl portion 211.
The water discharge time at this time is the main cleaning time Ta (for example, 3.3 seconds), and the time after the main cleaning time Ta is ended is time t22 (see FIG. 12).

This step S204 is a time “water is discharged from the spreader 228 after the use of the user is no longer detected”, in other words, “a time for cleaning the bowl portion 211 and replacing the drain trap 230 with cleaning water”. The time during which step S204 is executed is referred to as “main cleaning water discharge mode”.
Note that the amount of water used in the “main cleaning water discharge mode” (that is, the amount of water discharged from the first water discharge unit 228a) is about 0.5 liters.

<3.2. Organic dirt suppression water discharge mode>
Subsequently, the organic matter suppression water discharge mode will be described with reference to FIG.
First, in step S210, the controller 220A starts counting for a predetermined time T from the time when the previous organic dirt suppression water discharge mode is executed.

In step S211, the controller 220A determines whether or not a predetermined time T has elapsed since the time of S210.
If the predetermined time T has not elapsed, the controller 220A returns to S211.
When the predetermined time T has elapsed, the controller 220A determines that water discharge is effective in order to suppress the growth of bacteria that generate biofilms in the drain trap 230 and the horizontal pipe HP. It is determined to execute the organic stain suppression water discharge mode, and the process proceeds to S212.
In the present embodiment, the predetermined time T is preferably set to 1 hour to 3 hours, more preferably set to 1.5 hours to 2.5 hours, and further preferably set to 2 hours.

In step S212, the controller 220A opens the first on-off valve 227a.
Thus, water is intermittently discharged from the first water discharge portion 228a of the spreader 228 toward the bowl surface 211a of the bowl portion 211 at an instantaneous flow rate Q1.
In step S212, the time from the start of water discharge to the end of water discharge (water discharge time) is defined as an organic contamination suppression water discharge time Tc (eg, 13.2 seconds).

The series of step S210, step S211, and step S212 is “water discharge for suppressing the growth of bacteria that generate biofilms in the drainage trap 230 and the horizontal piping HP”. This is called “water discharge mode”.
Note that the amount of water used in the “organic matter suppression water discharge mode” (that is, the amount of water discharged from the first water discharge unit 228a) is constant each time, and the amount of water is a plurality of predetermined flow rates (for example, 1 liter, 2 liters). 4 liters).

<3.3. The effect of the urinal 200 according to the second embodiment of the present invention thus obtained is that of bacteria that generate a biofilm in the drain trap 230 and the horizontal pipe HP by executing the organic matter suppression water discharge mode. Proliferation can be suppressed, and formation of organic soil including biofilm can be suppressed. Further, even if organic matter contamination including biofilm is formed in the drain trap 230 and the horizontal pipe HP, according to the urinal 200, organic matter contamination is set by executing the organic matter suppression water discharge mode. Can be cleaned according to the schedule.
Furthermore, even if organic matter contamination including biofilm is formed in the drain trap 230 and the horizontal pipe HP, according to the urinal 200, after the urine is discharged by executing the urine dilution spouting mode, It is possible to reduce the urine concentration of the cleaning water in the drain trap 230 and the horizontal pipe HP until the cleaning water discharge mode is executed. Therefore, according to the urinal 200, it is possible to prevent urine in the wash water from generating urine stones in a relatively short time due to organic contamination.
Furthermore, according to the urinal 200, the urine dilution water discharge mode is executed, so that the urine concentration of the wash water in the drain trap 230 is reduced by the urine dilution when the main wash water discharge mode is executed. Therefore, even when the urine in the wash water in the drain trap 230 at the time of execution flows to the upstream side of the horizontal draw pipe HP by the execution of the main washing water discharge mode, the urine concentration of the wash water remaining in the horizontal draw pipe HP. And urine in the wash water can be prevented from generating urinary stones.
Therefore, according to the urinal 200, the urine in the wash water is removed from the urine in the drainage trap 230 and the horizontal pipe HP by the organic dirt including the biofilm by combining the organic dirt suppression discharging mode and the urine dilution discharging mode. This can be suppressed.
Further, since the amount of water used in the organic matter suppression water discharge mode is constant each time, it is possible to reliably suppress the accumulation of organic matter in the drain trap 230 and the horizontal pipe HP regardless of the use conditions.

  Further, in the urine dilution spout mode, when the urine in the drain trap 230 during urination flows into the horizontal pipe HP, the urine flows backward to the upstream side of the horizontal pipe HP because the instantaneous flow rate of the inflow is relatively small. It can suppress that it flows like. Thereby, it is possible to suppress the occurrence of urinary stones on the upstream side of the horizontal pipe HP. In addition, since the instantaneous flow rate of water discharge in the organic matter suppression water discharge mode is higher than the instantaneous flow rate of water discharge in the urine dilution water discharge mode, the horizontal pipe HP is reliably washed over a relatively wide area by water discharge in the organic matter suppression water discharge mode. Can do. Therefore, by combining the organic matter suppression water discharge mode and the urine dilution water discharge mode, it is possible to further suppress the urine in the wash water from causing urinary stones due to the organic matter contamination including the biofilm in the horizontal pipe HP.

  Furthermore, it is possible to ensure the cleaning performance of the bowl surface 211a in the main cleaning water discharge mode and to suppress the waste of the cleaning water used in the urine dilution water discharging mode.

  Furthermore, since the water level of the cleaning water that has flowed into the horizontal pipe HP in the organic dirt suppression water discharge mode is higher than the water level of the cleaning water that has flowed into the horizontal pipe HP in the main cleaning water discharge mode, the frequency of execution is reduced. Organic dirt including a biofilm generated in the vicinity of the water level surface of the horizontal pipe HP during execution of the main cleaning water discharge mode higher than the mode execution frequency can be washed away by the organic dirt water discharge mode. Therefore, it is possible to further suppress the urine in the wash water from generating the urinary stone in a relatively short time due to the organic matter contamination in the horizontal pipe HP.

  Furthermore, since the organic matter contamination suppressing water discharge mode is executed at regular intervals, the inside of the drainage trap 230 is surely replaced regardless of the frequency of use, so that the growth of organic contamination in the drainage trap 230 is suppressed. Accumulation of dirt in the drain trap 230 and the building pipe HP can be reliably suppressed.

  Furthermore, since the organic matter dirt suppression water discharge mode is intermittently executed, the organic matter dirt in the building pipe HP is less likely to remain compared to the case where the organic dirt suppression water discharge mode is performed only once. The accumulation of dirt inside can be suppressed.

<4. Modification>
As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the above. An example is shown below.

  For example, regarding a urinal, a wall-mounted urinal in which the lowermost part of the toilet body is positioned a predetermined distance above the floor and the back surface of the toilet body is attached along the wall surface behind it will be described. A floor-mounted urinal arranged directly on the floor may be used.

For example, in order to reduce the amount of water used, a predetermined waiting time may be provided between the time when the urinal detects use and the time when the urine dilution water discharge mode is started.
This waiting time is a waiting time that is intentionally achieved to achieve the purpose by a program recorded in the controller, etc., and a slight delay in the water discharge operation caused by a delay in signal transmission or valve body operation. It is distinguished from

100, 200 ... Urinal 110 ... Toilet body 111, 211 ... Bowl part 111a, 211a ... Bowl surface 111b ... Drain port 112 ... Storage chamber

DESCRIPTION OF SYMBOLS 120 ... Automatic washing unit 121 ... Main water supply pipe 121a ... Main water supply path 122 ... Stop cock 123a ... First water supply pipe 123b ... Second water supply pipe 124a ... 1st water supply path 124b ... 2nd water supply path 125 ... Pipe joint 126a ... 1st constant flow valve 126b ... 2nd constant flow valve 127a, 227a ... 1st opening and closing Valves 127b, 227b ... second on-off valves 128, 228 ... spreaders (water discharger)
128a, 228a ... 1st water discharging part 128b, 228b ... 2nd water discharging part 128c, 228c ... Urine detection sensor 129 ... Electrolytic release bactericidal water unit 120A, 220A ... Controller (control part) )

130, T ... Drain trap

U: Urine stone V ... Organic soil X ... Bacteria Y ... High pH environment zone Z ... Urease enzyme

W ・ ・ ・ Wall surface F ・ ・ ・ Floor surface S ・ ・ ・ Drain socket HP ・ ・ ・ Horizontal piping VP ・ ・ ・ Vertical drain

Ta ... Main cleaning time Tb ... Organic matter suppression water discharge judgment time Tc ... Organic matter suppression water discharge time Td ... Organic matter suppression water discharge execution time T ... Predetermined time P ... Predetermined number of times p .. Usage counter

Claims (9)

A urinal that drains into a horizontal pipe for drainage,
Forming a bowl surface for receiving urination, and forming a drain port at the bottom thereof;
A drain trap communicating with the drain port of the bowl portion;
A water discharge part for discharging cleaning water to the bowl surface of the bowl part;
A detection sensor that detects the use of the user's urinal;
A control unit for controlling the water discharge of the washing water by the water discharge unit,
The control unit is
After the detection sensor no longer detects the use of the user, the main cleaning water discharging mode for discharging water from the water discharging unit,
Organic matter suppression water discharge mode that suppresses the formation of organic matter contamination including the biofilm in the horizontal pipe connected to the downstream side of the drain trap by discharging cleaning water from the water discharge unit based on a set schedule,
While the detection sensor detects the use of the user, it has a urine dilution water discharge mode for discharging water from the water discharge unit,
A urinal characterized in that the amount of water discharged in the organic matter suppression water discharge mode is constant each time.   The urinal according to claim 1, wherein an instantaneous flow rate of water discharged from the water discharge unit in the urine dilution water discharge mode is smaller than an instantaneous flow rate of water discharged from the water discharge unit in the organic matter suppression water discharge mode.   The small flow rate according to claim 1 or 2, wherein an instantaneous flow rate of water discharged from the water discharge unit in the main cleaning water discharge mode is larger than an instantaneous flow rate of water discharged from the water discharge unit in the urine dilution water discharge mode. Toilet bowl.   The amount of water discharged from the water discharger in the organic matter suppression water discharge mode is equal to or greater than the amount of water discharged from the water discharger in the main cleaning water discharge mode. Urinal according to item.   The said control part performs the said organic matter stain | pollution | contamination suppression water discharge mode at the time of the organic substance stain | pollution | contamination suppression water discharge execution time after the said main washing | cleaning water discharge mode is complete | finished. The urinal described.   6. The urinal according to claim 5, wherein the organic dirt suppression water discharge execution time is freely selectable from a plurality of predetermined times. At the time when the organic dirt suppression water discharge determination time is shorter than the organic dirt suppression water discharge execution time after the main cleaning water discharge mode ends,
If the urinal usage count since the previous execution of the organic dirt suppression water discharge mode is a predetermined number or more, execute the organic dirt suppression water discharge mode,
When the urinal usage count since the previous execution of the organic matter suppression water discharge mode is less than a predetermined number, the organic matter suppression water discharge mode is executed when the organic matter suppression water discharge execution time has elapsed. The urinal according to claim 5.   The urinal according to any one of claims 1 to 4, wherein the organic matter suppression water discharge mode is executed at regular intervals.   The urinal according to any one of claims 1 to 8, wherein the organic matter suppression water discharge mode is intermittently executed.

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