JP3581228B2 - Urinal cleaning system - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a urinal cleaning system.
[0002]
[Prior art]
As is well known, in the case of a urinal, in order to clean the toilet body which receives urination after adding to it, flush water (in general, ordinary water is used from the top surface of the toilet body) To be flowed).
[0003]
Then, in order for the flush water to flow, on condition that the user presses the push button of the urinal flush valve attached to the upper part of the toilet body, the flush water flows out after a certain amount, and then stops. There is something that I did. However, when the pressing condition of the user is set as the starting condition, the washing cannot be performed if the user forgets to press the button. Further, there is a possibility that the push button may be pressed more than necessary due to mischief or the like, and there is a problem that the washing water is wasted. Further, there is a problem that the operation itself pressed by a person after use is complicated.
[0004]
Therefore, as a solution to the above problem, for example, an infrared sensor is installed above the urinal, and when a person stops in front of the urinal for a certain period of time, after that, the person moves away from the urinal in front of the urinal There is also a cleaning system which detects this and allows a certain amount of cleaning water to flow. Such a system has the advantage that it is not necessary for the person to press the push button each time, and that the washing water flows automatically when the person leaves after use, so that he / she does not forget to wash.
[0005]
[Problems to be solved by the invention]
However, in the above-described cleaning system using the infrared sensor, in order to install the sensor unit at a position that can be seen from the outside, a state where a hand or the like is intentionally held in front of the sensor unit is held for a certain period of time, and then the hand or the like concerned is moved away. As a result, a sensor output similar to that obtained when a person adds a small amount of light is obtained, and there is a possibility that the washing water may flow due to malfunction. Further, there is a possibility that the sensor unit itself may be depressed and damaged. As described above, a cleaning system having a structure in which infrared rays are exposed to the outside has a disadvantage that it is unnecessarily weak.
[0006]
Also, if a short person such as a child uses it, it will not reach the infrared detection area, so the presence of the person cannot be detected and the washing water must be flushed automatically. May not be possible. In addition, for example, a certain period of time before the urinal with the intention of adding the toilet, but if you leave the urinal without adding the toilet after all, flush the flush water because the toilet body is not dirty from the viewpoint of water saving etc. Although it is not necessary, in the case of a cleaning system using a conventional infrared sensor, the cleaning water flows. As described above, there is also a problem that an operation suitable for a use state such as the presence or absence of actual small use cannot be performed.
[0007]
Furthermore, since the sensor was exposed, there was a sense of incongruity in terms of design. In addition, since water flows depending on the presence or absence of the user, for example, even when the water distribution pipe is clogged, a certain amount of washing water flows, and there is a possibility that the water overflows outside the toilet body. Furthermore, since the amount of urine added by each user cannot be detected, a constant amount of washing water is constantly supplied, resulting in a large amount of waste. Further, naturally, it is not possible to detect the interruption of the washing water or the outflow.
[0008]
SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and has as its object to solve the above-described problems, to allow an appropriate amount of cleaning water to flow in accordance with a use state, to prevent mischief, and to prevent external To prevent water overflow, output abnormal alarms such as cutting off or leaving the washing water, and save water.Also, there is no clogging of foreign matter in the sensing system for performing the above processing, and it is always accurate and small. To provide a urinal flushing system that can detect the condition of a toilet bowl and does not expose a sensor for detecting the presence or absence of a toilet bowl to the outside, thereby preventing the sensor from being directly touched and being damaged and having a good design aspect. It is in.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, in the urinal cleaning system according to the present invention, a trap portion formed on an inner bottom surface of a toilet main body and capable of temporarily storing a predetermined amount of liquid, and flush water for the toilet main body are provided. It is assumed that a urinal cleaning system is installed in a urinal provided with a flush water pipe with a valve that can be supplied, and controls opening and closing of the valve. A pressure sensor installed above the trap portion, a tank provided on the back of the toilet body, a thick pipe connecting the trap portion and the tank, and a pressure guiding portion for the tank and the pressure sensor. And a thin pipe connecting the thick pipe and the liquid in the trap section can enter the thick pipe side, and the path from the thick pipe to the pressure guiding section is closed by the intruded liquid, Control means for detecting a change in the liquid level of the trap section through the gas blocked in the path by the pressure sensor and controlling opening and closing of the valve according to the detection result is provided (claim 1).
[0010]
According to the present invention, when a supplement is made, the urine discharged in the trap portion is accumulated, so that the water level rises. Then, since the water level in the path also rises, the gas in the path is compressed and the pressure rises. Therefore, it is possible to detect urination by detecting the pressure increase using the pressure sensor. Therefore, when the valve is opened in response to a control command from the control means that outputs based on the detection result, the washing water flows. The pressure sensor can detect the presence or absence of urination, so it can operate even if you are short like a child, there is no malfunction due to holding your hand etc. like an infrared sensor, and the sensor can be installed inside, so it will be damaged Possibility is low and it is hard to be mischief.
[0011]
Further, since the path is configured to include a tank provided on the back of the toilet body, a thick pipe connecting the tank and the trap portion, and a thin pipe connecting the tank and the pressure sensor, Even if foreign matter flows into the path from the trap part side, the inflow side is a thick pipe and the cross-sectional area of the piping path is large, so that the foreign matter also smoothly enters the trap part side as the water level in the trap part decreases. Is discharged. Therefore, the possibility of clogging in the path is reduced as much as possible.
[0012]
In addition, when a function of detecting the amount of urine discharged is provided as a function of the control means, when the amount of urine is large, the amount of washing water can be increased accordingly, and conversely, the amount of urine is small. In this case, the amount of washing water can be reduced. Thereby, it is not necessary to flow a large amount of washing water unnecessarily, and a water saving effect can be expected.
[0013]
Furthermore, since the water level of the liquid accumulated in the trap portion or the toilet body can be obtained based on the sensor output, it is determined whether or not the water level has exceeded a set value, so that the opening degree of the valve is determined. It can be changed. Here, changing the opening degree includes both changing the valve from the open state to the closed state when the set value is exceeded, and slightly reducing the opening degree of the valve to reduce the flow rate per unit time. . With such a configuration, for example, when the water distribution pipe of the urinal is clogged, if the flushing water is kept flowing, the water level rises and overflows from the toilet body, but before that, the valve is closed. By stopping the supply of the cleaning water or reducing the flow rate per unit time by reducing the degree of opening, it is possible to prevent overflow.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a urinal cleaning system according to a first embodiment of the present invention. As shown in the figure, a concave portion 2 is formed at the center of the bottom of the toilet body 1 that is open to the front for receiving urine, and a drain pipe 3 is integrally formed at the center of the concave portion 2. The upper end 3 a of the drain pipe 3 is formed so as to protrude above the bottom surface of the recess 2. Further, the upper end 3a of the water distribution pipe 3 is covered with a cylindrical lid 4 opened downward. The concave portion 2, the water pipe 3 and the lid 4 constitute a trap portion 5.
[0015]
As is well known, when a liquid flows into the concave portion 2, the trap portion 5 initially stores the liquid (water) in the concave portion 2 without being discharged from the water distribution pipe 3 as it is. . When a certain amount or more of the liquid accumulates in the concave portion 2, the excess liquid is discharged through the water pipe 3. That is, the liquid that has flowed into the concave portion 2 flows into the lid 4 through an opening provided at an appropriate position of the lid 4, and proceeds between the inner surface of the lid 4 and the outer surface of the water distribution pipe 3. When the water level rises and reaches above the upper end 3a of the drain pipe 3, the liquid existing between the drain pipe 3 and the lid 4 flows into the drain pipe 3 from the upper opening of the drain pipe 3 and is discharged. Has become. Note that a conventional configuration can be used as it is, and a detailed description of the configuration will be omitted.
[0016]
Further, a tip of a flush water pipe 7 is connected to an inner top surface of the toilet body 1, and a flow rate adjusting valve 8 is arranged in the middle of the flush water pipe 7. When the flow control valve 8 is opened, the flush water is supplied into the toilet body 1 from the tip of the flush water pipe 7, and when the flow control valve 8 is closed, the supply of the wash water into the toilet body 1 is stopped. It has become. The supply / stop of the cleaning water by opening / closing the valve in this manner is the same as in the related art.
[0017]
Here, in the present invention, when the valve is open, the opening can be adjusted. By adjusting the opening in this way, the flow rate of the washing water flowing per unit time can be adjusted. Then, the opening degree is adjusted based on a control signal output from the weak pressure sensor unit 10.
[0018]
The micro-pressure sensor unit 10 includes a semiconductor pressure sensor (micro-pressure sensor) and a signal processing circuit that performs predetermined signal processing on an output signal from the sensor. The amount of urine at the time, the presence or absence of an abnormality, and the like are determined, the opening of the valve is determined according to the determination result, and a control signal is sent to the flow regulating valve 8 so that the opening is determined. I have. The specific configuration will be described later.
[0019]
On the other hand, a tank 11 is installed on the back side of the toilet body 1, and the tank 11 and the trap section 5 are connected by a thick pipe 12. The mounting position of the thick pipe 12 is located below the liquid level (water level) of the liquid that is stored in the trap section 5 in normal times. As a result, a part of the liquid present in the trap portion 5 enters the thick pipe 12 and further enters the tank 11. Then, the water level in the tank 11 rises and falls following the rise and fall of the water level of the trap section 5. As a result, the water levels of the two 5 and 11 become the same.
[0020]
Further, the lower end of the thin pipe 13 is attached to the upper part of the tank 11, and the upper end of the thin pipe 13 is connected to the inlet of the micro-pressure sensor unit 10. With such a configuration, a path of the thick pipe 12 → the tank 11 → the thin pipe 13 → the pressure guiding section of the sensor unit (small pressure sensor) 10 is formed, and the liquid in the trap section 5 is provided on the trap section 5 side of the path. Enters, and the route is blocked. As a result, air is present in a closed space surrounded by the liquid and the micro-pressure sensor unit 10. Therefore, when the water level of the trap section 5 rises, the water level of the path (tank 11) rises accordingly, so that the volume of the closed space is reduced and the pressure in the closed space rises. Conversely, when the water level drops, the pressure in the enclosed space decreases. Therefore, the semiconductor pressure sensor (small pressure sensor) in the sensor unit 10 can detect the pressure change accompanying the fluctuation of the water level, and the water level can be obtained from the output of the semiconductor pressure sensor. Further, for example, when the water surface is fluctuating (wavy), the water level fluctuates little by little, so that the output of the semiconductor pressure sensor also has a vibration waveform. Based on such sensor outputs, the state of the liquid in the toilet body 1 (trap section 5) can be determined.
[0021]
FIG. 2 shows an example of the internal configuration of the weak pressure sensor unit 10 that performs the determination. As shown in the figure, the fine pressure sensor unit 10 has a pressure introducing pipe 14a protruding outside the case, and the upper end of the above-described thin pipe 13 is attached to the pressure introducing pipe 14a. The pressure introducing pipe 14a is integrally connected to the semiconductor pressure sensor in the micro-pressure sensor section 14, so that the air in the narrow pipe 13 is supplied into a pressure chamber (not shown) of the semiconductor pressure sensor. It is supposed to be. Therefore, a change in the liquid level can be detected by the micro-pressure sensor unit 14, converted into an electric signal, and output.
[0022]
The output signal of the low pressure sensor unit 14 is supplied to a high-pass filter (HPF) 15 and a setting comparison circuit 16. The HPF 15 extracts a characteristic amount (a signal corresponding to a pressure value) based on a minute liquid level change and sends the extracted characteristic amount to a waveform determination circuit 17 at the next stage. The waveform discriminating circuit 17 determines whether or not a supplement is performed based on the given pressure information, that is, the liquid level information (water level), and calculates the urine volume when the supplement is performed. The calculation result is output to the valve control circuit 18.
[0023]
Here, as an example of the sensor output, a waveform as shown in FIG. 3A is obtained at the time of addition, and a waveform as shown in FIG. 3B is obtained in the case of a signal based on disturbance. . That is, as shown in FIG. 7A, when the user is busy, urine accumulates in the trap portion 5 as urination proceeds, so that the water level in the trap portion 5 rises and the pressure rises. The output also rises. It should be noted that, when the experiment was repeated, if a relatively large amount of liquid (water) had already accumulated in the trap portion 5, a trajectory as shown by a solid line was taken, and no liquid was accumulated in the trap portion 5 (evaporated. In the case, it was found that a locus like a broken line was taken. In each case, urination starts at 0 seconds and stops within a few seconds. There are differences in the waveforms immediately before and after urination, but in both cases, the feature is that the pressure (water level) gradually increases at the start of urination.
[0024]
Further, as shown in FIG. 3B, in the case of mischief or other disturbance, although the liquid level of the trap portion 5 fluctuates, the water level does not rise, so that the output waveform oscillates and the disturbance is reduced. Return to the original water level (pressure). During the vibration, the value may be lower than the value at the start (reference value).
[0025]
Therefore, in this example, the waveform discriminating circuit 17 discriminates the two types of states shown in FIGS. 3A and 3B, and when it is detected that urination occurs as shown in FIG. Is measured. That is, from the received liquid level data (output of the HPF 15), a specific detection value is acquired at a constant sampling interval, and if the specific detection value is gradually increasing, it can be determined that a supplement is needed. Conversely, when the detected value repeatedly increases and decreases, it can be determined that a disturbance has occurred. Such a determination can be easily made, for example, by obtaining a differential value. The added total urine volume is obtained by, for example, integrating the detection values from the start of urination to the stop (when the differential value output becomes negative).
[0026]
Further, whether or not a disturbance has occurred can be discriminated by, for example, a window comparator. That is, as shown in FIG. 3, when the upper and lower thresholds Th1 and Th2 are appropriately selected, a waveform based on urination (FIG. 3A) exists between the two thresholds Th1 and Th2. , The waveform based on the disturbance (FIG. 6B) exceeds the range of the threshold values Th1 and Th2. Therefore, if the two thresholds Th1 and Th2 are set to the discrimination level in the window comparator, in the case of a disturbance waveform, at least one of the thresholds is exceeded, and the presence or absence of a disturbance is determined based on the output of the window comparator. Can be discriminated.
[0027]
Then, the valve control circuit 18 determines the amount of washing water based on the given urine amount data, obtains a necessary valve opening, and outputs a control signal to the flow rate adjusting valve 8. I have. In other words, when the urine volume is small, the opening amount is small because the amount of washing water may be small. Conversely, when the urine volume is large, the opening amount is increased to increase the washing water amount. decide. For the determination of the opening, for example, a table may be created in which the relationship between the amount of urine and the opening is paired, and the table may be obtained by referring to the table, or the relationship between the two may be expressed by an equation. Alternatively, it may be determined by substituting the urine amount into the arithmetic expression, and various methods can be adopted.
[0028]
Further, a normal opening / closing valve (the opening degree cannot be adjusted) may be used in place of such a flow control valve 8. In such a case, the total amount of washing water to be supplied may be changed according to the amount of urine by adjusting the time during which the washing water is flowing.
[0029]
On the other hand, the setting comparison circuit 16 compares the current water level data (pressure value) with the water level overflowing from the toilet body 1 and, if it is likely to overflow, sends an abnormal signal to the valve control circuit 18 and an alarm output. The signal is output to the circuit 19. The internal configuration of the setting comparison circuit 16 can be basically configured by a comparator. That is, the data of the current water level is equivalent to the pressure, and an electric signal corresponding to the pressure is output from the micro-pressure sensor unit 14. Therefore, the signal is connected to one input terminal of the comparator. Since the electric signal based on the water level, that is, the pressure when the water overflows from the toilet main body 1 is known, a value lower than that by a certain margin is given to the other input terminal of the comparator as a set value. . Accordingly, when the sensor output exceeds the set value, the output of the comparator becomes H, and an abnormal signal can be output.
[0030]
Then, the valve control circuit 18 that has received the abnormal signal from the setting comparison circuit 16 issues a control signal indicating “opening = 0 (close the valve)” to the flow control valve 8 in order to prevent overflow. . Further, the alarm output circuit 19 which has received the abnormal signal from the setting comparison circuit 16 sounds a buzzer, or issues a warning signal by wire or wireless to a monitoring room in a remote place, so that "the urinal fails and overflows. Or may overflow ".
[0031]
Further, by providing a plurality of comparators in parallel with the input as the setting comparison circuit 16 and making the setting values given to the respective comparators different, it is possible to issue a warning stepwise according to the water level. Then, the water level rises abnormally by outputting in a stepwise manner as described above, but if there is enough time before it overflows, the valve opening is narrowed to reduce the amount of water per unit time. If the water level further rises, the valve opening can be adjusted in various ways according to the state, such as closing the valve.
[0032]
With the above configuration, the pressure sensor is completely invisible to the user or the like, so that no mischief can be performed, and the pressure sensor is well viewed and has excellent design. Further, the liquid level change and the water level are measured by the waveform discrimination processing, the urine amount of each user is calculated from the liquid level change, and the washing water amount is changed to save water. In addition, it is possible to judge that the distribution pipe is clogged due to the abnormal rise of the water level data, to reduce the amount of washing water and to prevent overflow to the outside.
[0033]
Furthermore, if there is a continuous change in the liquid level from the sensor output, it can be determined that the water has not flown out due to a valve failure. Conversely, when no fluctuation is recognized, it can be determined that the washing water is not output, that is, that the water pipe is clogged. It is preferable to add a function for making such a determination, because more accurate and precise state determination can be performed.
[0034]
In other words, in this example, the amount of urine is calculated from the use time and the increase / decrease of the liquid level, and the opening degree and / or opening / closing time of the valve is determined. Then, when the water level rises and the pressure rises more than necessary, it is determined that the water distribution pipe is clogged, and a process such as shortening the opening time of the valve or closing the valve can be performed. If the pressure exceeds the set pressure, an alarm can be issued. Further, after confirming that there is a supplement, if a change in the liquid level cannot be detected even when the valve is opened, it is determined that the washing water has been cut off and an alarm can be issued.
[0035]
Furthermore, since the liquid in the trap portion 5 exists in the large-diameter thick pipe 12 and the tank 11, even if foreign matter such as dust flows from the trap portion 5 to the large pipe 12 side, there is a possibility that the foreign matter is clogged there. The liquid in the thick pipe 12 and the tank 11 flows out to the trap portion side as the water level decreases, and accordingly, dust and the like are also discharged. Therefore, accurate water level detection can always be performed.
[0036]
In use, the closed space is the space above the tank 11 and the narrow pipe 13, and the cross-sectional area is larger in the tank 11. Therefore, the pressure fluctuation with respect to the fluctuation of the water level also increases, and a smaller fluctuation of the water level can be detected, and the presence or absence of the fluctuation of the water surface and the displacement can be detected with high accuracy.
[0037]
FIG. 4 shows a second embodiment of the present invention. In this embodiment, the basic configuration is the same as that of the first embodiment shown in FIG. The difference is that a filter 20 for preventing the passage of liquid is provided in the narrow pipe 13 connected to the micro pressure sensor unit 10, preferably in front of the micro pressure sensor introduction port. As the filter 20, for example, a filter such as Gore-Tex (registered trademark) that allows the passage of air and blocks the passage of water and other liquids can be used.
[0038]
With such a configuration, it is possible to prevent water and other liquids from entering the sensor from the trap section 5, to malfunction the sensor output due to the entry of water and the like into the pressure chamber of the semiconductor pressure sensor, and to prevent a signal processing circuit This can prevent the occurrence of a failure. Note that the other configuration and operation and effect are the same as those of the above-described first embodiment, and thus the same reference numerals are given and the description thereof will be omitted.
[0039]
FIG. 5 shows a third embodiment of the present invention. This embodiment is based on the above-described second embodiment. Then, a washing pipe 22 is provided by branching from the washing water pipe 7 downstream of the flow control valve 8, and a tip (lower end) 22 a of the washing pipe 22 is inserted into the tank 11. Is located near the bottom.
[0040]
With this configuration, when the flow control valve 8 is opened and a predetermined amount of washing water is supplied to the toilet body 1 via the washing water pipe 7, a part of the washing water is supplied to the washing pipe 22 side. And is supplied into the tank 11. Thus, each time the washing water flows, the washing water is supplied into the tank 11 and both the liquid and foreign substances inside the tank 11 are discharged to the trap section 5 side, so that the clogging in the passage is more reliably prevented. Note that the other configurations, functions, and effects are the same as those of the above-described embodiments, and thus description thereof is omitted.
[0041]
FIG. 6 shows a fourth embodiment of the present invention. In the present embodiment, the trap 25 is formed by bending the middle of the narrow pipe 13 ′ into a U-upside-down U-shape based on the third embodiment. The inside of the trap 25 is filled with liquid silicone 26. Accordingly, since the silicone 26 has excellent chemical resistance, even if gas such as ammonia in urine rises through the narrow pipe 13 ′, the ammonia and the like are blocked by the silicone 26, and further rise is prevented. Can be deterred. Therefore, transmission of ammonia or the like to the side of the weak pressure sensor unit 10 can be suppressed.
[0042]
Since the silicone 26 is in a liquid state depending on the degree of polymerization, the type of the side group, and the degree of crosslinking, when the water level rises, air existing between the tip side of the narrow pipe 13 ′ and the silicone 26 is removed. As the silicone 26 is compressed, the silicone 26 moves upward, and the air between the silicone 26 and the micro-pressure sensor unit 10 is compressed accordingly, so that the sensor in the unit can detect the pressure change. Has become. Note that the other configurations, functions, and effects are the same as those of the above-described embodiments, and thus description thereof is omitted.
[0043]
Note that grease-like silicone can be used as long as pressure can be transmitted above and below the silicone 26. Further, in the case of silicone, since it is excellent in water repellency, it is possible to prevent the liquid from moving above the silicone. Therefore, although the filter 20 is provided in the illustrated example, the function of the filter 20 can also be used, and an effect similar to providing the filter 20 can be obtained without providing the filter 20. The trap is not limited to silicone as long as it can prevent an unnecessary gas such as ammonia from rising. The trap 25 may be filled with another substance as a blocking material.
[0044]
Furthermore, the structure in which the trap 25 filled with the silicone 26 is provided can be applied to the above-described embodiments. That is, the trap 25 may be provided in the narrow pipe of each embodiment in combination with the first embodiment or the second embodiment.
[0045]
Further, in each of the embodiments after the second embodiment, the example in which the filter 20 is provided in the narrow pipes 13 and 13 ′ has been described, but the third and fourth embodiments are similar to the first embodiment. Of course, the filter 20 may not be provided in the embodiment. As described above, the embodiments can be appropriately combined with each other.
[0046]
【The invention's effect】
As described above, in the urinal cleaning system according to the present invention, the pressure sensor detects a change in the water level in the trap portion, and the cleaning water flows according to the detection result. Cleaning water can be supplied, and mischief can be prevented, overflowing to the outside can be prevented, abnormal alarming of the water being cut off or leaving it out, and water saving can be achieved.
[0047]
Furthermore, since the pressure sensor for detecting the presence or absence of a refill can be installed inside, the sensor is not exposed to the outside, so that the sensor can be prevented from being directly touched and damaged, and the design can be improved.
[0048]
By providing the thick piping and the tank while exhibiting the various effects described above, it is possible to prevent clogging in the path as much as possible. Also, the detection sensitivity of the sensor is improved, and highly accurate detection and control can be performed.
[Brief description of the drawings]
FIG. 1 is a view showing a first embodiment of a urinal cleaning system according to the present invention.
FIG. 2 is a diagram showing an internal configuration of the micro pressure sensor unit.
FIG. 3 is a diagram illustrating an example of a sensor output.
FIG. 4 is a view showing a second embodiment of the urinal cleaning system according to the present invention.
FIG. 5 is a view showing a third embodiment of a urinal cleaning system according to the present invention.
FIG. 6 is a view showing a fourth embodiment of a urinal cleaning system according to the present invention.
[Explanation of symbols]
1 Toilet bowl body
5 Trap section
7 Cleaning water piping
8 Flow control valve (valve)
10 Micro pressure sensor unit
11 tank (path)
12 Thick piping (path)
13, 13 'Narrow piping (path)
14 Micro pressure sensor (pressure sensor)

Claims (1)

A trap portion capable of temporarily storing a predetermined amount of liquid formed on the inner bottom surface of the toilet body,
A urinal cleaning system that is installed in a urinal including a flush water pipe with a valve capable of supplying flush water to the toilet body, and controls opening and closing of the valve.
A pressure sensor installed above the trap portion,
A tank provided on the back of the toilet body,
A thick pipe connecting the trap section and the tank,
A narrow pipe connecting the tank and the pressure guiding portion of the pressure sensor,
And, while allowing the liquid in the trap portion to enter the thick pipe side, so as to close the path from the thick pipe to the pressure guiding portion by the invaded liquid,
A flushing device for urinals, comprising a control means for detecting a change in the liquid level of the trap section through the gas blocked in the path by the pressure sensor, and controlling opening and closing of the valve according to the detection result. system.

Images