JP4411737B2 - Washing water discharge method of flush toilet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flush water discharge method for flush toilets.
[0002]
[Prior art]
In household flush toilets that are directly supplied with flush water from the water supply, the bowl is constructed by discharging flush water from the rim water spouting hole provided in the rim of the bowl upper end of the flush toilet to the upper part of the bowl. Cleaning the surface and raising the water level in the bowl, and then discharging the wash water from the jet nozzle located at the bottom of the bowl to the bottom of the bowl, causing a siphon phenomenon in the trap drain, And sewage at once.
In low-tank household flush toilets that are supplied with wash water from the row tank, wash water supplied from the row tank is distributed to the rim spout hole disposed at the rim portion at the upper end of the bowl portion and the bottom portion of the bowl portion. It discharges simultaneously from the provided jet spout hole, cleans the bowl surface, causes a siphon phenomenon in the trap drainage channel, and discharges filth and sewage in the bowl part to an external discharge pipe all at once.
[0003]
[Problems to be solved by the invention]
At the end of the siphon phenomenon where the water level in the drainage trap becomes low due to a drop in the water level in the drainage trap in water flush toilets that are directly connected to the water supply or low tank tightly-coupled household flush toilets, There is a problem that the cleaning water discharged from the hole directly collides with the wall surface of the drain trap to generate noise, or air is involved to generate noise. The present invention has been made in view of the above problems, and is a cleaning water discharge method for a domestic flush toilet with a direct water supply or a domestic flush toilet with a low tank, which discharges from a jet nozzle or a jet spouting hole. An object of the present invention is to provide a cleaning water discharge method capable of suppressing noise generation due to cleaning water. In addition, as a related prior document, there exists Unexamined-Japanese-Patent No. 2-132234, for example.
[0004]
[Means for Solving the Problems]
In the present invention, in order to solve the above-mentioned problem, there is provided a flush water discharge method for a flush toilet for domestic use, in which flush water is directly supplied from the water supply, and the bowl unit upper portion of the flush toilet is provided from the first discharge means. In the cleaning water discharge method, in which the cleaning water is discharged from the second discharge means to the lower part of the bowl portion, the second discharge is performed when the water level in the bowl portion drops to a predetermined water level at the end of the siphon phenomenon. Stop the discharge of the cleaning water from the means, and restart the discharging of the cleaning water from the second water discharge means when the water level of the stored water in the bowl rises above the predetermined water level, and perform intermittent discharge of the cleaning water a predetermined number of times. A cleaning water discharge method is provided.
[0005]
At the end of the siphon phenomenon, the water level in the bowl drops to a level where the wash water discharged from the second water discharge means may directly collide with the wall surface of the drain trap or generate noise by entraining air. Then, the discharge of the washing water from the second discharge means is stopped, and the sewage pushed up to the upper part of the drain trap returns to the bottom of the bowl part, and when the water level in the bowl part rises above a predetermined level, the second water discharge Since the discharge of the cleaning water from the means is resumed and the intermittent discharge of the cleaning water is performed a predetermined number of times, the cleaning water discharged from the second water discharging means does not directly collide with the wall surface of the drain trap and no air is involved. As a result, the generation of noise due to the cleaning water discharged from the second water discharging means is suppressed. Further, by intermittently repeating the discharge of the wash water from the second discharge means in a state where the water level of the stored water in the bowl portion is relatively low, the floating dirt in the vicinity of the free surface of the stored water is effectively discharged. .
[0006]
In a preferred embodiment of the present invention, a constant flow valve disposed in the course of a wash water pipe extending between a water supply pipe and a flush toilet, indicating that the water level in the bowl portion has dropped to a predetermined value. And a timer. In a preferred aspect of the present invention, the water level sensor that detects the water level of the stored water in the bowl portion detects that the water level in the bowl portion has decreased to a predetermined value. In a preferred embodiment of the present invention, an integrated flow meter disposed in the course of a wash water pipe extending between a water supply pipe and a flush toilet, indicating that the water level in the bowl portion has decreased to a predetermined value. Detect by.
[0007]
A method for detecting that the water level in the bowl portion has dropped to a level at which the wash water discharged from the second water discharge means collides directly with the wall surface of the drain trap, or air may be involved to generate noise. Detects the total flow rate of the wash water supplied to the flush toilet by means of a constant flow valve and a timer arranged in the middle of the flush water pipe extending between the water supply pipe and the flush toilet. When it reaches a predetermined value determined by the drainage characteristics of the toilet bowl, it may be judged that the water level has been reduced to the level of noise generation, and the water level sensor may be used to directly detect the water level of the stored water in the bowl. The total flow rate of the wash water supplied to the flush toilet is detected by an integrating flow meter located in the middle of the flush water pipe extending between the flush toilet and the total flow rate reaches a predetermined value determined by the drainage characteristics of the flush toilet. Noise generated when It may be determined that was reduced to the nearest.
[0008]
According to the present invention, there is provided a washing water discharge method for a domestic flush toilet with a low tank in which washing water is supplied from the low tank, and the washing water is discharged from the first discharge means to the upper part of the bowl portion of the flush toilet at the same time. In the cleaning water discharge method for discharging cleaning water from the two discharging means to the lower part of the bowl part, when the water level in the bowl part falls to a predetermined water level at the end of the siphon phenomenon, the discharging of the cleaning water from the second discharging means is stopped. And a cleaning water discharge method characterized in that the discharge of the cleaning water from the second water discharge means is resumed when the water level in the bowl portion rises above the predetermined water level, and the cleaning water is intermittently discharged a predetermined number of times. provide.
When the water level in the bowl portion drops to a level at which the wash water discharged from the second water discharge means directly collides with the wall surface of the drain trap, or air may be involved and generate noise, the second discharge means When the sewage pushed up to the top of the drain trap returns to the bottom of the bowl and the water level in the bowl rises above a predetermined level, the wash water from the second water discharge means is stopped. Since the cleaning water is intermittently discharged for a predetermined number of times to restart the discharge, the cleaning water discharged from the second discharge means does not directly collide with the wall surface of the drain trap and no air is involved. As a result, the generation of noise due to the cleaning water discharged from the second discharge means is suppressed. Further, by intermittently repeating the discharge of the wash water from the second discharge means in a state where the water level of the stored water in the bowl portion is relatively low, the floating dirt in the vicinity of the free surface of the stored water is effectively discharged. .
[0009]
According to the present invention, there is provided a washing water discharge method for a domestic flush toilet with a low tank in which washing water is supplied from the low tank, and the washing water is discharged from the first discharge means to the upper part of the bowl portion of the flush toilet at the same time. In the cleaning water discharge method for discharging cleaning water from the two discharge means to the lower part of the bowl part, a plurality of second discharge means having different installation heights are provided, and the installation height is reduced in response to a decrease in the water level of the stored water in the bowl part. There is provided a cleaning water discharge method characterized by stopping the discharge of cleaning water sequentially from a high second discharge means toward a second discharge means having a low installation height.
If the water level in the bowl drops to a level at which the wash water discharged from the second discharge means directly collides with the wall surface of the drain trap or entrains air and generates noise, Since the discharge of the washing water is sequentially stopped from the high second discharge means to the second discharge means having a low installation height, the wash water is discharged from the second discharge means that is lower than the water level in the bowl portion. The washing water discharged from the second discharge means does not directly collide with the wall surface of the drain trap and does not involve air. As a result, the generation of noise due to the cleaning water discharged from the second discharge means is suppressed.
[0010]
In a preferred aspect of the present invention, the water level sensor that detects the water level of the stored water in the bowl portion detects that the water level in the bowl portion has decreased to a predetermined value.
The water level sensor can detect that the water level in the bowl portion has dropped to the noise generation level.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described.
As shown in FIG. 1, a water supply direct-type flush toilet 1 includes a toilet body 2. The toilet body 2 includes a bowl part 3, a rim water passage 4 formed at the upper edge of the bowl part 3, and a drain trap 5 extending from the lower part of the bowl part 3. A plurality of rim water discharge holes 4 a are formed in the rim water passage 4. The end of the drain trap 5 is connected to an external discharge pipe (not shown).
A box 6 is disposed above the rear part of the toilet body 2. A pipe 7 connected to a water supply pipe (not shown) extends into the box 6. A pipe 8 branched from the pipe 7 is connected to the rim water passage 4 via an electromagnetic valve 9. A pipe 10 branched from the pipe 7 is connected to a jet nozzle 13 disposed at the bottom of the bowl portion 3 via an electromagnetic valve 11 and an atmosphere release valve 12. The jet nozzle 13 is directed to the drain trap 5.
A control device 14 for controlling the operation of the electromagnetic valves 9 and 11 is disposed in the box 6. An operation unit 15 that outputs a cleaning activation signal to the control device 14 is provided.
A constant flow valve 16 is disposed in the middle of the pipe 7. A timer (not shown) is disposed in the control device 14.
[0012]
In the direct water flush toilet 1 according to the present embodiment, when the operation unit 15 is manually operated, the electromagnetic valve 9 is opened under the control of the control device 14, and the water supply pipe, the pipe 7, and the pipe 8 are connected. Then, a constant flow of cleaning water is supplied to the rim water passage 4 and discharged from the rim water discharge hole 4a to the upper portion of the bowl portion 3. The discharged cleaning water cleans the upper surface of the bowl part 3 and raises the water level in the bowl part 3.
Under the control of the control device 14, the electromagnetic valve 9 is closed and the electromagnetic valve 11 is opened. A constant flow of washing water is supplied to the jet nozzle 13 through the water supply pipe, the pipe 7 and the pipe 10 and is discharged from the jet nozzle 13 to the lower portion of the bowl portion 3. The washing water discharged to the lower part of the bowl portion 3 causes a siphon phenomenon in the drain trap 5 and the filth and waste water in the bowl portion 3 are discharged to the external discharge pipe at once through the drain trap 5. At the end of the siphon phenomenon, the water level in the bowl portion 3 decreases and the amount of sewage in the drain trap 5 also decreases.
[0013]
The timer is activated from the moment when the supply of cleaning water to the toilet body 2 is started, and the cleaning water supply time is measured. The control device 14 detects the total flow rate of the cleaning water from the start of cleaning based on the cleaning water supply time and the constant flow rate determined by the constant flow valve 16. When the total flow rate of the cleaning water from the start of cleaning reaches a predetermined value determined by the drainage characteristics of the flush toilet 1, the control device 14 determines the level of the stored water in the bowl portion 3 from the jet nozzle 13 It is judged that the water level has dropped to the level at which it directly collides with the wall surface of the drain trap 5 or that may cause noise by generating air, and thereafter, the electromagnetic valve 11 is intermittently opened and closed and intermittently from the jet nozzle 13. Allow the cleaning water to be discharged. While the discharge of the washing water from the jet nozzle 13 is stopped, the sewage pushed up to the top of the drain trap 5 returns to the bottom of the bowl part 3 and the level of the stored water in the bowl part 3 rises. At this time, the discharge of cleaning water from the jet nozzle 13 is resumed. Thereafter, the stop and restart of the discharge of the cleaning water from the jet nozzle 13 are repeated a predetermined number of times. Since the cleaning water is discharged from the jet nozzle 13 when the water level in the bowl portion 3 rises above the noise generation water level, the discharged cleaning water does not directly collide with the wall surface of the drain trap 5 and no air is involved. . As a result, noise generation due to the cleaning water discharged from the jet nozzle 13 is suppressed. Since the discharge of the cleaning water from the jet nozzle 13 is repeated intermittently in a state where the water level of the stored water in the bowl portion 3 is relatively low, the floating dirt in the vicinity of the free surface of the stored water is effectively discharged. .
[0014]
When the discharge of the filth from the bowl portion 3 is completed, the electromagnetic valve 11 is closed and the electromagnetic valve 9 is opened under the control of the control device 14. A constant flow of wash water is supplied to the rim water passage 4 through the water supply pipe, the pipe 7 and the pipe 8, and is discharged from the rim water discharge hole 4a to the upper part of the bowl part 3 to store the water in the bowl part 3. Form.
Under the control of the control device 14, the electromagnetic valve 9 is closed and the toilet flushing is finished.
[0015]
In the above embodiment, the discharge of the cleaning water from the jet nozzle 13 is intermittently performed at the end of the siphon phenomenon. However, at the end of the siphon phenomenon, the electromagnetic valve 9 is opened and the bowl portion from the rim water spouting hole 4a is opened. The cleaning water may be discharged to the top of 3. The water level of the stored water in the bowl portion 3 rises, and noise generation due to the washing water discharged from the jet nozzle 13 is suppressed. Even in this case, since the washing water is discharged from the jet nozzle 13 in a state where the water level of the stored water in the bowl portion 3 is relatively low, the floating dirt in the vicinity of the free surface of the stored water is effectively discharged. The A new pipe branched from the pipe 7 via the new solenoid valve is guided to the bowl part 3, and at the end of the siphon phenomenon, the new solenoid valve is opened and the washing water is discharged to the bowl part 3 via the new pipe. May be. The water level of the stored water in the bowl portion 3 rises, and noise generation due to the washing water discharged from the jet nozzle 13 is suppressed. Even in this case, since the washing water is discharged from the jet nozzle 13 in a state where the water level of the stored water in the bowl portion 3 is relatively low, the floating dirt in the vicinity of the free surface of the stored water is effectively discharged. The
[0016]
The water level in the bowl part 3 can be detected by directly detecting the water level in the bowl part 3 using a water level sensor. The total flow rate of cleaning water from the start of cleaning is detected by a meter, and when the total flow rate reaches a predetermined value determined by the drainage characteristics of the flush toilet 1, the water level in the bowl portion 3 is discharged from the jet nozzle 13. It may be determined that the cleaning water has collided directly with the wall surface of the drain trap 5 or has fallen to a water level that may cause noise by generating air.
[0017]
A second embodiment of the present invention will be described.
As shown in FIG. 2, the low tank tightly-flush toilet bowl 21 includes a toilet bowl body 22. The toilet body 22 includes a bowl portion 23, a rim water passage 24 formed on the upper edge of the bowl portion 23, and a drain trap 25 extending from the lower portion of the bowl portion 23. In the rim water passage 24, a plurality of rim water discharge holes 24a are formed. A jet water discharge hole 26 directed to the drain trap 25 is formed in the lower portion of the bowl portion 25. The end of the drain trap 25 is connected to an external discharge pipe (not shown).
A low tank 27 is tightly coupled to the rear part of the toilet body 22. A pipe 28 connected to a water supply pipe (not shown) extends into the low tank 27. A water stop valve 29 is disposed near the end of the pipe 28. A float 30 for opening and closing the water stop valve 29 is provided. A drain hole 31 is formed at the bottom of the low tank 27, and a drain valve 32 that opens and closes the drain hole 31 is provided. The drain valve 32 is operated by an operation lever (not shown) attached to the low tank 27.
In the toilet body 22, a water storage section 32 is formed immediately below the drain hole 31 of the low tank 27. The water storage section 32 communicates with the rim water passage 24 through the communication hole 33. The water storage section 32 communicates with the jet water discharge hole 26 through a water passage 34. A solenoid valve (not shown) is disposed in the middle of the water passage 34, and a control device (not shown) for controlling the solenoid valve is disposed. A water level sensor (not shown) for detecting the water level of the stored water in the bowl portion 23 is provided.
[0018]
In the low tank close-fitting flush toilet 21 according to the present embodiment, when an operation lever (not shown) is manually operated, the drain valve 32 is opened, and the wash water in the row tank 27 flows into the water storage section 32 through the drain hole 31. Then, the water storage section 32 is filled up. Wash water in the water storage section 32 flows into the rim water passage 24 through the communication hole 33 and is discharged from the rim water discharge hole 24 a to the upper portion of the bowl portion 23. The discharged cleaning water cleans the upper surface of the bowl portion 23 and raises the water level in the bowl portion 23.
Wash water in the water storage section 32 flows into the water passage 34. The electromagnetic valve disposed in the water passage 34 is open, and the wash water flowing into the water passage 34 is discharged from the jet water discharge hole 26 to the lower portion of the bowl portion 23. The washing water discharged to the lower part of the bowl portion 23 causes a siphon phenomenon in the drain trap 25, and the filth and the dirty water in the bowl portion 23 are discharged to the external discharge pipe at once through the drain trap 25. At the end of the siphon phenomenon, the water level in the bowl 23 decreases and the amount of sewage in the drain trap 25 also decreases.
[0019]
The water level in the bowl portion 23 detected by the water level sensor is such that the cleaning water discharged from the jet spout hole 26 may directly collide with the wall surface of the drain trap 25 or may generate noise by entraining air. When the pressure drops to the lower limit, the control device intermittently opens and closes the electromagnetic valve disposed in the water passage 34 and discharges the cleaning water from the jet water discharge hole 26 intermittently. While the discharge of the washing water from the jet water spouting hole 26 is stopped, the sewage pushed up to the upper part of the drain trap 25 returns to the bottom of the bowl part 23, and the level of the stored water in the bowl part 23 rises. At this time, the electromagnetic valve is opened and the discharge of the cleaning water from the jet water discharge hole 26 is resumed. Thereafter, the stop and restart of the discharge of the cleaning water from the jet water discharge hole 26 are repeated a predetermined number of times. Since the cleaning water is discharged from the jet water discharge hole 26 when the water level in the bowl portion 23 rises above the noise generation water level, the discharged cleaning water does not directly collide with the wall surface of the drain trap 25 and air is also involved. Absent. As a result, noise generation due to the cleaning water discharged from the jet water discharge hole 26 is suppressed. Since the discharge of the cleaning water from the jet water spouting hole 26 is repeated intermittently in a state where the water level of the stored water in the bowl portion 23 is relatively low, the floating dirt present in the vicinity of the free surface of the stored water is effectively discharged. The
[0020]
When the water level in the bowl portion 23 drops to a level at which the cleaning water discharged from the jet water discharge hole 26 directly collides with the wall surface of the drain trap 25 or the air is likely to generate noise. When the water level in the low tank 27 is lowered, the drain valve 32 is closed, the water stop valve 29 is opened by the float 30, and the wash water is supplied to the low tank 27 through the water supply pipe and the pipe 28. The wash water in the water storage section 32 continues to be discharged intermittently to the lower part of the bowl portion 23 through the water passage 34 and the jet water discharge hole 26. Even after the discharge of the filth from the bowl portion 23 is completed, the discharge of the cleaning water from the jet water spouting hole 26 continues, but the flow rate has decreased, so the cleaning water discharged from the jet water spouting hole 26 is discharged from the drain trap 25. The top cannot be crossed, and it collects in the lower part of the bowl part 23 to form water. When the water level in the low tank 27 rises to a predetermined water level, the water stop valve 29 is closed by the float 30 and toilet flushing is completed.
[0021]
In the above-described embodiment, at the end of the siphon phenomenon, the cleaning water is discharged intermittently from the jet water discharge hole 26. However, as shown in FIG. , 26b, 26c may be provided, and the heights of the communication portions of the water passages 34a, 34b, 34c communicating with the water storage compartments 32 communicating with the jet water discharge holes 26a, 26b, 26c may be sequentially reduced. Corresponding to the drop in the water level in the bowl part, the water level in the water storage section 32 is also lowered, and the inflow of washing water stops in the order of the water passages 34a, 34b, 34c. As a result, the water level in the bowl portion 23 drops to a level at which the cleaning water discharged from the jet spout hole 26a may directly collide with the wall surface of the drain trap 25 or involve air and generate noise. Then, since the discharge of washing water is sequentially stopped from the jet water discharge hole 26a toward the jet water discharge hole 26c, the wash water can be discharged from the jet water discharge hole that is lower than the water level in the bowl portion 23. Therefore, the washing water discharged from the jet water spouting hole does not directly collide with the wall surface of the drain trap 25 and no air is involved. As a result, noise generation due to the cleaning water discharged from the jet water discharge hole is suppressed.
[0022]
【The invention's effect】
As can be seen from the above description, according to the cleaning water discharge method according to the present invention, the water level in the bowl portion is such that the cleaning water discharged from the second water discharge means directly collides with the wall surface of the drain trap or the air. When the water level is lowered to the level where there is a possibility of generating noise, the discharge of the washing water from the second discharge means is stopped, and the sewage pushed up to the upper part of the drain trap returns to the bottom of the bowl part and accumulates in the bowl part. When the water level rises above the predetermined water level, the discharge of the cleaning water from the second water discharging means is resumed, and the cleaning water is intermittently discharged a predetermined number of times, so the cleaning water discharged from the second water discharging means is the wall surface of the drain trap Does not directly collide with the air, nor does it involve air. As a result, noise generation due to the cleaning water discharged from the second water discharging means is suppressed. Further, by intermittently repeating the discharge of the wash water from the second discharge means in a state where the water level of the stored water in the bowl portion is relatively low, the floating dirt present in the vicinity of the free surface of the stored water is effectively discharged. .
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a directly connected flush toilet in which a flush water discharge method for a flush toilet according to a first embodiment of the present invention is implemented.
FIG. 2 is a cross-sectional view of a low tank tightly connected flush toilet in which a flush water discharge method for flush toilets according to a second embodiment of the present invention is implemented.
FIG. 3 is a partial cross-sectional view of a low tank close-fitting flush toilet in which a variation of the flushing water discharge method for flush toilets according to a second embodiment of the present invention is implemented.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water supply direct-type flush toilet 2 Toilet body 3 Bowl part 4a Rim water discharge hole 5 Trap drainage channel 13 Jet nozzle 21 Low tank close connection type flush toilet 22 Toilet body 23 Bowl part 24a Rim water discharge hole 25 Trap drainage channel 26 Jet water discharge hole

Claims (7)

 A flush water discharge method for a domestic flush toilet that is directly supplied with flush water from a water supply, wherein the flush water is discharged from the first discharge means to the upper part of the bowl portion of the flush toilet, and then from the second discharge means. In the cleaning water discharge method for discharging cleaning water to the lower part of the bowl part, when the water level in the bowl part falls to a predetermined water level at the end of the siphon phenomenon, the discharge of the cleaning water from the second discharging means is stopped and the inside of the bowl part is stopped. A cleaning water discharge method characterized by performing intermittent discharge of cleaning water a predetermined number of times, wherein the discharge of cleaning water from the second water discharge means is resumed when the water level of the stored water rises above a predetermined water level. Detecting that the water level in the bowl has fallen to a specified value is detected by a constant flow valve and a timer placed in the middle of the wash water pipe extending between the water supply water supply pipe and the flush toilet. The cleaning water discharge method according to claim 1 , wherein 2. The cleaning water discharge method according to claim 1 , wherein the water level sensor that detects the water level in the bowl portion detects that the water level in the bowl portion has dropped to a predetermined value. It is characterized by detecting that the water level of the stored water in the bowl portion has dropped to a predetermined value by an integrated flow meter disposed in the middle of the wash water pipe extending between the water supply water supply pipe and the flush toilet. The cleaning water discharging method according to claim 1 .  A washing water discharge method for a domestic flush toilet with a low tank supplied with washing water from a low tank, wherein the washing water is discharged from the first discharge means to the upper part of the bowl portion of the flush toilet, and at the same time the bowl from the second discharge means In the cleaning water discharge method for discharging the cleaning water to the lower part of the unit, at the end of the siphon phenomenon, when the water level in the bowl part drops to a predetermined water level, the discharge of the cleaning water from the second discharging means is stopped and the inside of the bowl part is stopped. A cleaning water discharge method characterized by performing intermittent discharge of cleaning water a predetermined number of times, which restarts discharging of cleaning water from the second water discharge means when the water level of the accumulated water rises above a predetermined water level.  A washing water discharge method for a domestic flush toilet with a low tank supplied with washing water from a low tank, wherein the washing water is discharged from the first discharge means to the upper part of the bowl portion of the flush toilet, and at the same time the bowl from the second discharge means In the cleaning water discharge method for discharging cleaning water to the lower part of the section, a plurality of second discharge means having different installation heights are provided, and the second discharge means having a high installation height corresponding to a decrease in the water level of the stored water in the bowl portion The cleaning water discharge method is characterized in that the discharge of the cleaning water is sequentially stopped from the first to the second discharging means having a low installation height. 7. The cleaning water discharge method according to claim 5 , wherein the water level sensor that detects the water level in the bowl portion detects that the water level in the bowl portion has dropped to a predetermined value.

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