JP2008163604A - Water closet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water closet which can treat water overflowing from a water storage tank, without being wholly upsized. <P>SOLUTION: Characteristically, this water closet (1) for being flushed with pressurized flushing water comprises: a water closet body (2) which is equipped with a bowl portion (12) and a drainage trap pipeline (14) for prescribing a reservoir water level; the water storage tank (32) for storing the flushing water, the overflow edge of which is formed higher than an overflow edge of the bowl portion; tank water supply means (22 and 28) for supplying the flushing water up to a prescribed water storage level; a pressure pump (34) which pumps the flushing water to the bowl portion by pressurizing the stored flushing water; a flushing-water pipeline top portion (44) which is formed in the flushing water pipeline between the pressure pump and the bowl portion, and which is positioned higher than the reservoir water level and the water storage level, and lower than the overflow edge of the water storage tank; and a vacuum breaker (36) which is provided in the flushing water pipeline between the water storage tank and the bowl portion, so as to take atmospheric air into the flushing-water pipeline top portion. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a flush toilet, and more particularly to a flush toilet that is washed with pressurized flush water.

  Japanese Patent Application Laid-Open No. 2005-264469 describes a flush toilet. In this flush toilet, the bowl portion is washed by pressurizing flush water stored in a tank with a pump and discharging the pressurized flush water from a jet nozzle of the flush toilet body. Moreover, in this flush toilet, the overflow water of a tank is processed by providing the overflow pipe which connects a tank and the valve unit for supplying washing water.

JP 2005-264469 A

  However, in the flush toilet described in Japanese Patent Application Laid-Open No. 2005-264469, the overflow water in the tank is processed by the overflow pipe that communicates the tank and the valve unit, so a special pipe for processing the overflow water is provided. It is necessary to provide it. For this reason, there exists a problem that the whole flush toilet including a flush toilet body and a tank will enlarge.

  Accordingly, an object of the present invention is to provide a flush toilet capable of treating overflow water from a water storage tank without increasing the overall size.

  In order to solve the above-described problems, the present invention is a flush toilet flushed with pressurized washing water, which extends obliquely upward from the bowl portion and the bottom portion of the bowl portion, then descends, A flush toilet body equipped with a drain trap pipe that regulates the water level of the reservoir, and a water storage tank that stores flush water for washing the bowl, with an overflow edge formed higher than the overflow edge of the bowl , Tank water supply means for supplying cleaning water to the water storage tank up to a predetermined water storage level, a pressure pump for pressurizing the cleaning water stored in the water storage tank and pumping it to the bowl portion, and the pressure pump and the bowl The washing water pipe formed between the water tank and the bowl part is formed in the washing water pipe between the water tanks and positioned higher than the stored water level and the stored water level and lower than the overflow edge of the water tank. Provided on the road A vacuum breaker for sucking air into the water pipe apex, is characterized by having a.

  In the present invention configured as described above, at the time of cleaning the bowl portion, the cleaning water in the water storage tank is pressurized by the pressurizing pump, and the pressurized cleaning water passes through the top of the cleaning water conduit of the cleaning water conduit. It is pumped through the bowl and the bowl is washed. Further, at the time of non-cleaning, the cleaning water in the bowl portion and the cleaning water in the water storage tank are cut off by a vacuum breaker. If for some reason the water level in the water storage tank becomes higher than the top of the washing water pipe, the washing water in the water storage tank will be discharged to the bowl part beyond the top of the washing water pipe, and the washing water from the water storage tank will be discharged. Overflow is prevented.

  According to the present invention configured as described above, the overflow water from the water storage tank can be processed without providing a special overflow pipe from the water storage tank, so that the overflow water can be discharged without increasing the size of the flush toilet. Can be processed. In addition, since the overflow edge of the water storage tank is higher than the overflow edge of the bowl part, when the drainage from the bowl part is not sufficiently drained due to clogging of the drain trap pipe, etc. The wash water will overflow from the overflow edge of the bowl. Thereby, the user can immediately recognize that the washing water has overflowed, and can prevent the spread of damage due to the delayed discovery of water leakage.

  In the present invention, the predetermined stored water level is preferably higher than the stored water level and lower than the top of the flush water pipe.

  According to the present invention configured as described above, since the stored water level in the storage tank is higher than the stored water level, it is possible to reduce the size of the entire flush toilet while sufficiently securing the amount of water stored in the storage tank. it can.

In this invention, Preferably, it has further the non-return valve provided in the washing water pipe line between a water storage tank and a pressurization pump.
According to the present invention configured as described above, even when the water level in the water storage tank is lowered below the pressurizing pump, the washing water in the pressurizing pump does not flow back to the water storage tank. Thereby, it can prevent that a noise generate | occur | produces by operating the pressurization pump which is not in a full water state, or a pressurization pump is damaged.

In the present invention, preferably, the washing water conduit for communicating the water storage tank and the pressure pump is connected to the lower portion of the water storage tank, and further has a water drain plug provided in the washing water conduit.
According to the present invention configured as described above, the conduit for guiding the cleaning water to the bowl portion and the drainage flow path of the water storage tank can be used in common.

In the present invention, preferably, the check valve and the water drain plug are configured as one assembly, and the check valve is also removed by removing the water drain plug.
According to the present invention configured as described above, since the check valve is also removed by removing the water stopper, the washing water staying in the pressurizing pump can be drained at the same time.

In this invention, Preferably, it has further the drainage channel which discharges the wash water which overflowed from the overflow edge of the water storage tank to the bowl part.
According to the present invention configured as described above, overflow from the water storage tank can be prevented even when the overflow channel via the top of the cleaning water pipe is clogged.

  In the present invention, preferably, it further has a water drain control means, and the water drain control means prohibits water supply to the water storage tank, operates the pressure pump, and supplies the wash water in the water storage tank to the bowl portion. To discharge.

  According to the present invention configured as described above, since the washing water in the water storage tank is discharged to the bowl portion by the pressurizing pump, the washing water remaining in the water storage tank is removed when the water drain plug is opened. Can be reduced. Thereby, the wash water discharged | emitted from a water drain plug can be processed easily.

  In the present invention, preferably, the drainage control means operates the pressure pump so that the wash water in the water storage tank is discharged to the bowl portion at a flow rate in which no siphon phenomenon occurs in the drain trap pipe.

  According to the present invention configured as described above, even when the drainage control means operates the pressurizing pump, the retained water in the bowl portion remains, so that the sealed water in the drain trap pipe can be maintained. it can.

  In the present invention, preferably, it further has a bowl portion water supply means for supplying cleaning water to the bowl portion without going through the water storage tank, and the drainage control means discharges the cleaning water in the water storage tank to the bowl portion. Thereafter, the bowl water supply means is operated to seal the drain trap pipe.

  According to the present invention configured as described above, the wash water in the water storage tank can be quickly discharged to the bowl portion, and the sealed water in the drain trap pipe can be maintained.

  According to the flush toilet of the present invention, overflow water from a water storage tank can be treated without increasing the overall size.

Next, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, referring to FIGS. 1 to 4, a flush toilet according to an embodiment of the present invention will be described. FIG. 1 is a side view of a flush toilet according to this embodiment. FIG. 2 is a block diagram showing the overall configuration of the flush toilet according to this embodiment. FIG. 3 is a perspective view of a drain valve and a flapper valve configured as one assembly used in the flush toilet according to the present embodiment. FIG. 4 is a flowchart showing a processing procedure by the drainage control means in the flush toilet of the present embodiment.

  As shown in FIG. 1, the flush toilet 1 according to the first embodiment of the present invention is arranged so as to cover the flush toilet body 2, the toilet seat 4 disposed on the upper surface of the flush toilet body 2, and the toilet seat 4. And a local cleaning device 8 disposed in the upper rear part of the flush toilet main body 2. Moreover, the function part 10 is arrange | positioned at the back of the flush toilet main body 2, and this function part 10 is covered with the side panel 10a.

  The flush toilet main body 2 is made of earthenware, and includes a bowl portion 12 for receiving filth, a drain trap pipe 14 extending from the bottom of the bowl portion 12, a jet spout 16 for jet water discharge, and a rim spout for rim water discharge. A water port 18 is formed. The drain trap pipe 14 extends rearward and obliquely upward from the bottom of the bowl portion 12 and then descends downward and is connected to the drain pipe D. The jet spout 16 is formed at the bottom of the bowl portion 12 and is configured to discharge cleaning water toward the inlet of the drain trap conduit 14. The rim water spouting port 18 is formed at the upper left rear of the bowl portion 12 and is configured to discharge cleaning water along the edge of the bowl portion 12.

  The flush toilet 1 according to the first embodiment of the present invention is directly connected to a water supply that supplies cleaning water, and the cleaning water is discharged from the rim spout 18 by the water supply pressure of the water supply. In addition, the jet water spouting is configured such that the washing water stored in the water storage tank built in the function unit 10 is pressurized by a pressure pump and discharged from the jet water spouting port 16 at a large flow rate.

Next, the configuration of the functional unit 10 will be described with reference to FIG.
As shown in FIG. 2, the function unit 10 includes a constant flow valve 20, an electromagnetic valve 22, a rim water discharge vacuum breaker 24, and a rim water discharge flapper valve 26. Further, the function unit 10 includes a switching valve 28 for switching between water supply to the tank and rim water discharge, a water storage tank 32, a pressure pump 34, a jet water discharge vacuum breaker 36, a jet water discharge flapper valve 38, water A stopper 39 is incorporated. Further, the function unit 10 incorporates a controller 40 that is a cleaning control means for controlling the electromagnetic valve 22, the switching valve 28, and the pressurizing pump 34.

  The constant flow valve 20 is configured to restrict the wash water flowing from the water inlet 20a through the stop cock 42a, the strainer 42b, and the branch fitting 42c to a predetermined flow rate or less. In the present embodiment, the constant flow valve 20 is configured to limit the flow rate of the cleaning water to 16 liters / minute or less. The washing water that has passed through the constant flow valve 20 flows into the electromagnetic valve 22, and the washing water that has passed through the electromagnetic valve 22 is directed to the rim water spouting port 18 or the water storage tank 32 by the switching valve 28.

The electromagnetic valve 22 is opened and closed by a control signal from the controller 40, and is configured to cause the supplied wash water to flow into the switching valve 28 or to stop.
The switching valve 28 is switched by a control signal from the controller 40 and is configured to discharge the wash water that has flowed in through the electromagnetic valve 22 from the rim water spouting port 18 or into the water storage tank 32.

  The rim water discharge vacuum breaker 24 is disposed in the middle of the rim-side water supply path 18 a that guides the wash water that has passed through the switching valve 28 to the rim water discharge port 18, and prevents backflow from the rim water discharge port 18 of the wash water. Further, the rim water discharge vacuum breaker 24 is disposed about 25.4 mm (about 1 inch) above the upper end surface of the bowl portion 12 and reliably prevents backflow. Further, the rim water spouting vacuum breaker 24 is disposed above the overflow edge L1 of the water storage tank 32, and the wash water overflowing from the atmosphere opening portion of the rim water spouting vacuum breaker 24 passes through the return pipe 24a. It is configured to flow into the water storage tank 32.

  The rim water spouting flapper valve 26 is disposed in the rim-side water supply passage 18 a downstream of the rim water spouting vacuum breaker 24, and prevents backflow from the rim water spouting port 18 of the cleaning water. In the present embodiment, the rim water discharge vacuum breaker 24 and the rim water discharge flapper valve 26 are arranged in series in the rim side water supply path 18a, thereby preventing the backflow of the washing water more reliably.

  The water storage tank 32 is configured to store cleaning water to be discharged from the jet water discharge port 16. In the present embodiment, the water storage tank 32 has an internal volume of about 2.5 liters.

  Furthermore, in this embodiment, the front end of the tank water supply path 32a is opened at a position of about 1 inch (25.4 mm) above the overflow edge L1 of the water storage tank 32, and the water supply tank 32 to the tank water supply path 32a. Prevents backflow. Further, an upper end float switch 32b and a lower end float switch 32c are arranged inside the water storage tank 32, and are configured to detect the water level in the water storage tank 32. The upper end float switch 32b is turned on when the water level in the water storage tank 32 reaches a predetermined water storage level, and the controller 40 is configured to detect this and close the electromagnetic valve 28. On the other hand, the lower end float switch 32c is turned on when the water level in the water storage tank 32 falls to a predetermined water level, and the controller 40 is configured to detect this and stop the pressurizing pump 34. Details of the control by the controller 40 will be described later.

  A lid 32d is attached to the upper portion of the water storage tank 32 so as to cover the opening at the upper end thereof, and the outer periphery of the lid 32d and the inner wall surface of the upper portion of the water storage tank 32 are joined in a watertight manner. Yes. Furthermore, the lid 32d is provided with a circular hole, and a cylindrical body 32e is attached so as to extend upward so as to surround the hole. Therefore, the upper end of the cylindrical body 32e is an overflow edge L1 of the water storage tank 32.

  Further, the wall surface of the water storage tank 32 extends to the upper side of the lid body 32d, and the wash water overflowing from the overflow edge L1 of the water storage tank 32 flows down to the outside of the cylindrical body 32e and accumulates on the lid body 32d. It is like that. Further, a drainage passage 32f is connected to the wall surface above the lid 32d of the water storage tank 32, and the washing water accumulated on the lid 32d is discharged to the bowl portion 12. The height L2 of the base end of the drainage passage 32f is positioned at a position lower than the overflow edge L1 of the water storage tank 32 and higher than the upper end L3 of the bowl part 12 that is the overflow edge of the bowl part 12. Accordingly, when the level of the wash water overflowing from the overflow edge L1 of the water storage tank 32 and accumulated on the lid 32d (height L4) exceeds the height L2 of the base end of the drainage passage 32f, the wash water is drained. It flows into the bowl part 12 through 32f.

  The pressurizing pump 34 is configured to pressurize the wash water stored in the water storage tank 32 and discharge the pressurized water from the jet water outlet 16. The pressurizing pump 34 is connected by a cleaning water pipe 34 a extending from the lower portion of the water storage tank 32, and pressurizes the cleaning water stored in the water storage tank 32. In the present embodiment, the pressurizing pump 34 is configured to pressurize the cleaning water in the water storage tank 32 and discharge the cleaning water from the jet water outlet 16 at a maximum flow rate of about 100 liters / minute. Yes.

  Further, a jet water spouting flapper valve 38 and a water drain plug 39, which are check valves, are provided in the middle of the washing water pipe 34a. The jet water spouting flapper valve 38 and the water drain plug 39 are configured as one assembly, and are arranged at a height near the lower end of the water storage tank 32 below the pressurizing pump 34. For this reason, by opening the water drain plug 39, the cleaning water in the water storage tank 32 and the pressure pump 34 can be discharged during maintenance or the like. Further, by disposing a jet water spouting flapper valve 38 between the water storage tank 32 and the pressurizing pump 34, when the water level in the water storage tank 32 becomes lower than the height of the pressurizing pump 34, washing water is added. Backflow from the pressure pump 34 to the water storage tank 32 prevents the wash water in the pressure pump 34 from escaping.

  On the other hand, the outlet of the pressurizing pump 34 is connected to the jet water spouting port 16 at the bottom of the bowl portion 12 through a washing water conduit 34b. In the middle of the washing water pipe 34 b, a convex shape is formed upward, and the washing water pipe top 44, which is the highest part of the convex part, is a washing water pipe from the water storage tank 32 to the jet spout 16. It is the highest part of the road. The height L5 of the washing water pipe top 44 is positioned higher than the stored water level L6 of the water storage tank 32 and lower than the overflow edge L3 of the bowl 12. In the present specification, the height of the washing water pipe top 44 is a vertical cross section perpendicular to the axis of the washing water pipe 34b at the highest portion of the washing water pipe 34b, and the bottom of the cross section is taken. It means height. That is, when the water level in the washing water pipe 34 b rises and becomes higher than the height of the washing water pipe top 44, the washing water flows into the bowl portion 12 beyond the washing water pipe top 44.

  The jet water spouting vacuum breaker 36 is connected to the branch pipe 36a branched from the downstream side of the pressurizing pump 34 and the washing water pipe top 44, and the stored water in the bowl 12 flows backward to the storage tank 32 side. And is configured to perform edge cutting between them. As a result, the stored water level L6 in the water storage tank 32 can be set higher than the stored water level L7 in the bowl portion 12. Further, the sheet surface of the jet water spouting vacuum breaker 36 is disposed at a position higher than the overflow edge L3 of the bowl portion 12 and the overflow edge L1 of the water storage tank 32, and overflows from the air release portion of the jet water spouting vacuum breaker 36. The washed water is configured to flow into the water storage tank 32 through the return pipe 36b.

  The controller 40, which is a cleaning control means, sequentially operates the electromagnetic valve 22, the switching valve 28, and the pressurizing pump 34 by the operation of the toilet cleaning switch (not shown) by the user, and the rim water spouting port 18 and the jet water spouting port 16 are operated. The bowl portion 12 is washed by sequentially starting the water discharge from the. Further, after the cleaning is completed, the controller 40 opens the electromagnetic valve 22, switches the switching valve 28 to the water storage tank 32 side, and replenishes the water storage tank 32 with cleaning water. When the water level in the water storage tank 32 rises and the upper end float switch 32b detects a specified water storage amount, the controller 40 is configured to close the electromagnetic valve 22 and stop water supply. Accordingly, the electromagnetic valve 22 and the switching valve 28 function as tank water supply means.

  Moreover, the controller 40 incorporates the water drain control means 40a for performing the water drain procedure. Specifically, the controller 40 includes a CPU, a memory, and a program that operates them.

Next, the configurations of the jet water spouting flapper valve 38 and the water drain plug 39 will be described with reference to FIG.
As shown in FIG. 3, the water drain plug 39 has a water drain main body 39a, a plug 39b, and a cap 39c, and a jet water spouting flapper valve 38 is integrally incorporated in the plug 39b. A washing water conduit communicating with the water storage tank 32 is connected to the side surface of the water drain main body 39a, and a washing water conduit 34a communicating with the pressurizing pump 34 is connected to the upper surface. In addition, a circular opening is formed on the side surface of the water drain main body 39a, and the opening is sealed in a watertight manner by fitting the plug 39b into the opening and covering the cap 39c.

  A jet water spouting flapper valve 38 is attached to a portion of the plug 39b inserted into the water drain main body 39a so as to rotate upward. Thus, when the cleaning water flows from the water storage tank 32 to the pressurizing pump 34, the jet water spouting flapper valve 38 is rotated upward by the water force and opened. Further, when a reverse flow is generated from the pressurizing pump 34 toward the water storage tank 32, the jet water spouting flapper valve 38 is rotated and directed in the horizontal direction and closed. Further, a strainer 38 a is disposed below the jet water spouting flapper valve 38 to prevent foreign matter from flowing into the pressurizing pump 34.

  When draining water for maintenance or freezing prevention, the plug 39b is pulled out from the opening of the water drain main body 39a. As a result, the jet water spouting flapper valve 38 provided on the plug 39b is also removed, so that the cleaning water remaining in the pressurizing pump 34 and the water storage tank 32 is discharged from the opening. Details of the draining procedure will be described later.

Next, the operation of the flush toilet 1 according to the embodiment of the present invention will be described.
First, when a toilet flushing switch (not shown) is operated in the standby state, the first rim water discharge is started. That is, when the user operates a toilet flushing switch (not shown), the controller 40 sends a signal to the electromagnetic valve 22 to open it, and also switches the switching valve 28 to the rim water spouting port 18 side by the water supply pressure. Wash water is discharged from the rim spout 18. When the electromagnetic valve 22 is opened, the wash water supplied from the water supply flows into the constant flow valve 20 from the water inlet 20a through the stop cock 42a, the strainer 42b, and the branch fitting 42c. In the constant flow valve 20, when the water supply pressure is high, the flow rate of the wash water that is passed is limited to a predetermined flow rate, and when the water supply pressure is low, the wash water is passed as it is without restricting the flow. The The washing water that has passed through the constant flow valve 20 passes through the electromagnetic valve 22 and the switching valve 28, passes through the rim water discharge vacuum breaker 24, the rim water discharge flapper valve 26, and the rim-side water supply path 18 a, and reaches the upper part of the bowl portion 12. It is discharged from the rim spout 18 that opens to the rear left side. The washing water discharged from the rim water spouting port 18 flows downward while turning in the bowl portion 12, and the inner wall surface of the bowl portion 12 is washed.

  After a predetermined time has elapsed, jet water spouting is started. That is, the controller 40 sends a signal to the pressure pump 34 to activate it. When the pressurizing pump 34 is activated, the wash water stored in the water storage tank 32 flows into the pressurizing pump 34 through the jet water spouting flapper valve 38 and the drain plug 39 and is pressurized. The washing water pressurized by the pressurizing pump 34 passes through the washing water pipe top 44 of the washing water pipe 34b and is discharged from the jet water outlet 16 opened at the bottom of the bowl part 12. The air staying in the vicinity of the washing water pipe top portion 44 of the washing water pipe 34b reaches the jet water spouting vacuum breaker 36 through the branch pipe 36a and is released from the atmosphere opening portion.

  The washing water discharged from the jet spout 16 flows into the drain trap pipe 14 and fills the drain trap pipe 14 to cause a siphon phenomenon. Due to this siphon phenomenon, the accumulated water and dirt in the bowl portion 12 are sucked into the drain trap pipe 14 and discharged from the drain pipe D. In the present embodiment, the wash water pressurized by the pressurizing pump 34 is discharged from the jet spout 16 at a large flow rate of about 100 liters / minute, so that the siphon phenomenon in the drain trap pipe 14 is rapidly caused. As a result, the accumulated water and dirt in the bowl portion 12 are quickly discharged. Preferably, the washing water is discharged from the jet water outlet at a flow rate of about 75 to 120 liters / minute.

  By operating the pressurizing pump 34 for a predetermined time, a predetermined amount of jet water is discharged from the jet water outlet 16 and the amount of water stored in the water storage tank 32 becomes substantially zero. When the pressurizing pump 34 is stopped, water discharge from the jet water outlet 16 is stopped. As a result, air is introduced from the jet water spouting vacuum breaker 36 into the cleaning water conduit, and the stored water in the bowl portion 12 and the cleaning water in the water storage tank 32 are separated.

  After a predetermined time has elapsed, the controller 40 sends a signal to the electromagnetic valve 22 to open it again, and starts the second water discharge from the rim water spouting port 18. The water level in the bowl portion 12 rises due to the second water discharge from the rim water spouting port 18, and after the predetermined rim water discharge time has elapsed, the inside of the bowl portion 12 reaches the predetermined water level.

  After completion of the second rim water discharge, replenishment of cleaning water to the water storage tank 32 is started. That is, the controller 40 sends a signal to the electromagnetic valve 22, opens it, and sends a signal to the switching valve 28 to switch it to the tank side. When the electromagnetic valve 22 is opened, the wash water flowing in from the water inlet 20a passes through the constant flow valve 20, the electromagnetic valve 22, the switching valve 28, and the tank water supply path 32a, and reaches the water storage tank from the tip of the tank water supply path 32a. 32 flows in. Since the tip of the tank water supply path 32a is arranged so that an air gap of about 25.4 mm is formed with respect to the overflow edge L1 of the water storage tank 32, the backflow from the water storage tank 32 to the water supply is reliably prevented. The

  When washing water is replenished in the water storage tank 32 and the water level in the water storage tank 32 reaches the specified water storage level L6, the float switch 32b is turned on. When the float switch 32b is turned on, the controller 40 sends a signal to the electromagnetic valve 22 to close it.

Next, an operation when water supply to the water storage tank 32 is not stopped due to malfunctions of the float switch 32b, the electromagnetic valve 22, and the like will be described.
If the solenoid valve 22 is not closed even when the water tank 32 reaches the specified water level, the water level in the water tank 32 rises higher than the specified water level L6, and eventually the top of the wash water pipe 34b of the wash water pipe 34b. A height L5 of 44 is reached. When the water level of the water storage tank 32 becomes higher than the washing water pipe top 44, the washing water in the water storage tank 32 flows over the washing water pipe top 44 and flows into the bowl portion 12 through the jet spout 16. When the wash water flows from the jet spout 16, the water level in the bowl portion 12 rises and exceeds the stored water level L 7 in the bowl portion 12, so the wash water in the bowl portion 12 passes through the drain trap pipe 14. It is discharged to the drain pipe D.

  For this reason, the water level in the water storage tank 32 does not rise above the height L5 of the cleaning water pipe top 44, and overflow of the cleaning water from the water storage tank 32 is prevented. In the present embodiment, the washing water pipe top 44 is positioned below the lid 32d (height L4) of the water storage tank 32, so that the water level in the water storage tank 32 is higher than the lid 32d. Will not rise. As described above, the cleaning water line from the pressurizing pump 34 through the cleaning water pipe top 44 to the jet water outlet 16 also functions as an overflow pipe.

  On the other hand, if the drainage flow rate through the jet water outlet 16 is insufficient due to a trouble such as clogging of the pipe line from the water storage tank 32 to the jet water outlet 16, the water level in the water storage tank 32 is changed to the top of the washing water pipe top 44. It rises above the height L5. When the water level of the water storage tank 32 rises and becomes higher than the upper end of the cylindrical body 32e that is the overflow edge L1 of the water storage tank 32, the overflowing wash water flows onto the lid body 32d. When the level of the washing water accumulated on the lid 32d becomes higher than the height L2 of the base end of the drainage passage 32f, the washing water on the lid 32d flows into the bowl portion 12 through the drainage passage 32f. . Thereby, overflow of the washing water from the water storage tank 32 is prevented.

  Further, when trouble such as clogging occurs in the drain trap pipe 14 or the like communicated with the bowl portion 12 and the drainage flow rate from the bowl portion 12 is insufficient, the water level in the bowl portion 12 changes the stored water level L7. Rise over. Also in this case, since all of the overflowing wash water supplied to the water storage tank 32 is collected in the bowl portion 12, the water leakage that occurs in the worst case occurs beyond the overflow edge L3 of the bowl portion 12. For this reason, the user can immediately detect and deal with water leakage. As a result, water leaks from the water storage tank 32 behind the flush toilet main body 2 which is difficult to be recognized by the user, and the spread of damage due to the delay in finding the water leak is prevented.

Next, with reference to FIG. 4, the effect | action at the time of the draining process of the flush toilet 1 by embodiment of this invention is demonstrated.
First, in step S1 of FIG. 4, when the drain mode switch (not shown) of the flush toilet 1 is turned on by the user, the drain control means 40a built in the controller 40 is activated. First, in step S2, the drainage control means 40a sends a signal to the electromagnetic valve 22, and closes the electromagnetic valve 22 when it is in the open state. Thereby, even if it is the water supply to the water storage tank 32, water supply is stopped. Next, in step S3, the water drain control means 40a sends a signal to the pressurizing pump 34 to rotate it at a low speed. As a result, the washing water accumulated in the water storage tank 32 is discharged into the bowl portion 12 through the jet water spouting port 16. The pressurizing pump 34 is operated at a low rotational speed so that the washing water flows in from the jet spout 16 at a large flow rate and the siphon phenomenon does not occur in the drain trap pipe 14. In the present embodiment, the pressurizing pump 34 is rotated at about 1500 rpm, and the cleaning water is caused to flow into the bowl portion 12 at a flow rate of about 40 liters / min.

  Next, in step S4, it is determined whether or not the upper end float switch 32b has been switched off. When the upper end float switch 32b is OFF, that is, when the water level in the water storage tank 32 is lower than the upper end float switch 32b (height L6), the process proceeds to step S5. Repeat the process. Further, in step S5, it is determined whether or not the lower end float switch 32c has been turned on. If the lower end float switch 32c is on, that is, if the water level in the water storage tank 32 is lower than the lower end float switch 32c, the process proceeds to step S6, and if not lower, the process of step S5 is repeated.

  In step S6, the drainage control means 40a sends a signal to the pressurizing pump 34 to stop it. That is, the pressurization pump 34 is operated in a state where the water level in the water storage tank 32 is lower than the lower end float switch 32c, thereby preventing the pressurization pump 34 from being damaged. Since a jet water spouting flapper valve 38 is provided between the water storage tank 32 and the pressurizing pump 34, backflow from the pressurizing pump 34 to the water storage tank 32 is prevented. For this reason, even after the pressurizing pump 34 is stopped, the cleaning water remains in the pressurizing pump 34.

  After the pressurization pump 34 is stopped, the user removes the plug 39b of the drain plug 39 from the drain plug body 39a. As a result, the drain plug 39 is opened and the jet water spouting flapper valve 38 is removed, so that the washing water remaining in the water storage tank 32 and the washing remaining in the pressurizing pump 34 and the washing water pipe line are removed. Water is discharged from the opening of the water drain main body 39a. At this time, the washing water in the pipe downstream of the washing water pipe 34b of the washing water pipe 34b and the accumulated water in the bowl part 12 remain without being discharged. Further, since most of the washing water in the water storage tank 32 has already been discharged to the bowl portion 12 by operating the pressurizing pump 34, the amount of washing water discharged from the opening of the water drain main body 39a is as follows. There are few. In the present embodiment, all drainage from the opening of the water drain main body 39 a is received by the water receiving tray 2 a (FIG. 2) disposed below the water drain plug 39.

  Next, in step S7, it is determined whether or not a power switch (not shown) of the flush toilet 1 is turned off. If the power switch is turned off, the process proceeds to step S13, and if not turned off, the process proceeds to step S8.

  In step S8, it is determined whether or not a drain mode switch (not shown) has been turned off by the user. When the drain mode switch is turned off, the process proceeds to step S9. When the drain mode switch is not turned off, the process of step S8 is repeated. In step S9, the water drain control means 40a sends a signal to the electromagnetic valve 22 to open it. When the electromagnetic valve 22 is opened, the washing water flows into the water storage tank 32 through the electromagnetic valve 22 and the switching valve 28 that is switched to the water storage tank side.

  Next, in step S10, it is determined whether or not the lower end float switch 32c has been turned off. When the lower end float switch 32c is off, that is, when the water level in the water storage tank 32 is higher than the lower end float switch 32c, the process proceeds to step S11, and when it is not increased, the process of step S10 is repeated. Further, in step S11, it is determined whether or not the upper end float switch 32b has been turned on. When the upper end float switch 32b is on, that is, when the water level in the water storage tank 32 reaches the predetermined water storage level L6 and reaches the height of the upper end float switch 32b, the process proceeds to step S12. The process of step S11 is repeated. In step S12, the drain control means 40a sends a signal to the electromagnetic valve 22 to close it, and the flush toilet 1 returns to the standby state.

  On the other hand, when the power switch (not shown) of the flush toilet 1 is turned off in step S7, the processing in step S13 and subsequent steps is executed. When the power of the flush toilet 1 is turned on after the power switch is turned off, the processes of steps S14 to S17 are executed as the process when the power is turned on. Since the processes in steps S14 to S17 are the same as the processes in steps S9 to S12, the description thereof is omitted. However, when the power is not turned on after draining the water storage tank 32 and the cleaning water is stored in the water storage tank 32 up to the water storage level L6, the electromagnetic valve 22 is opened in step S14. Thereafter, steps S15 and S16 are immediately passed, and the solenoid valve 22 is immediately closed in step S17.

  According to the flush toilet of the embodiment of the present invention, since the washing water pipe used for washing the bowl portion can be used as the overflow pipe, the overflow water is treated without providing a special overflow pipe. be able to. Thereby, the whole flush toilet can be reduced in size.

  Further, according to the flush toilet of the present embodiment, the stored water level in the water storage tank is higher than the stored water level in the bowl portion, so that the entire flush toilet is small while ensuring a sufficient amount of water stored in the water storage tank. Can be

  Furthermore, according to the flush toilet of this embodiment, since the overflow edge of the water storage tank is higher than the overflow edge of the bowl part, the wash water is stored in the water storage tank even when drainage from the bowl part is not sufficiently performed. The overflow does not overflow from the overflow edge, and the wash water overflows from the overflow edge of the bowl. Thereby, the user can immediately recognize that the washing water has overflowed, and can prevent the spread of damage due to the delayed discovery of water leakage.

  Further, according to the flush toilet of this embodiment, since the jet water spouting flapper valve is provided in the washing water conduit between the water storage tank and the pressurizing pump, the water level in the water storage tank is higher than that of the pressurizing pump. Even when the pressure drops downward, the washing water in the pressurizing pump does not flow back into the water storage tank. Thereby, it can prevent that a noise generate | occur | produces by operating the pressurization pump which is not in a full water state, or a pressurization pump is damaged.

  Furthermore, according to the flush toilet of the present embodiment, the washing water conduit that connects the water storage tank and the pressurizing pump is connected to the lower part of the water storage tank, and a water drain plug is provided in the washing water conduit. Can be used both as a conduit for guiding the water to the bowl portion and a flow path for draining the water storage tank.

  Moreover, according to the flush toilet of this embodiment, since the flapper valve for jet water discharge and the water drain plug are comprised as one assembly, they are staying in the pressurizing pump by removing the water drain plug. The washing water can be drained at the same time.

  Furthermore, according to the flush toilet of the present embodiment, since the drainage passage for discharging the wash water on the lid of the water storage tank to the bowl portion is provided, the overflow flow path via the top of the wash water pipe line is clogged. In such a case, overflow from the water storage tank can be prevented.

  Further, according to the flush toilet of the present embodiment, the drainage control means operates the pressurizing pump to discharge the wash water in the water storage tank to the bowl part, so that the wash water in the water storage tank is discharged to the bowl part. Thus, when the water drain plug is opened, the washing water remaining in the water storage tank can be reduced. Thereby, the wash water discharged | emitted from a water drain plug can be processed easily.

  Further, according to the flush toilet of the present embodiment, the drainage control means operates the pressure pump so that the siphon phenomenon does not occur in the drain trap pipe, so that the accumulated water in the bowl portion is not removed even when draining. It remains and can maintain the sealing water of the drain trap line.

  As mentioned above, although preferable embodiment of this invention was described, a various change can be added to embodiment mentioned above. In particular, in the above-described embodiment, only the wash water from the jet spout is pressurized by the pressure pump, but the present invention is applied to a flush toilet that also presses the wash water from the rim spout. You can also.

  Further, in the above-described embodiment, the water storage level of the water storage tank is configured to be higher than the stored water level of the bowl portion, but these water levels can be arbitrarily set.

  Furthermore, in the above-described embodiment, the washing water on the water tank lid is directly discharged to the bowl portion by the drainage passage, but the washing water overflowing from the overflow edge of the water storage tank You may discharge to a bowl part via a path.

  In the embodiment described above, the drainage control means operates the pressure pump at a low speed so that the siphon phenomenon does not occur in the drain trap pipe. As a modification, the pressure pump operates at a high speed. You may let them. In this case, a bowl portion water supply means for supplying cleaning water to the bowl portion without going through the water storage tank is provided, and after the accumulated water in the bowl portion is discharged by the siphon phenomenon, the bowl portion water supply means supplies the bowl portion to the bowl portion. Supply water and seal the drain trap line. In the embodiment described above, a water supply system that discharges wash water from the rim spout can be used as the bowl portion water supply means.

1 is a side view of a flush toilet according to an embodiment of the present invention. It is a block diagram which shows the whole structure of the flush toilet by embodiment of this invention. 1 is a perspective view of a drain valve and a flapper valve configured as one assembly used in a flush toilet according to an embodiment of the present invention. It is a flowchart which shows the procedure of the process by the drainage control means in the flush toilet bowl by embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flush toilet according to embodiment of this invention 2 Flush toilet main body 2a Water receiving tray 4 Toilet seat 6 Cover 8 Local cleaning device 10 Functional part 10a Side panel 12 Bowl part 14 Drain trap line 16 Jet spout 18 Rim spout 18a Rim-side water supply path 20 Constant flow valve 20a Water inlet 22 Solenoid valve 24 Rim water discharge vacuum breaker 24a Return line 26 Rim water discharge flapper valve 28 Switching valve 32 Water storage tank 32a Tank water supply path 32b Upper end float switch 32c Lower end float switch 32d Lid Body 32e Cylinder 32f Drainage passage 34 Pressurizing pump 34a Washing water pipe 34b Washing water pipe 36 Jet water discharge vacuum breaker 36a Branch pipe 36b Return pipe 38 Jet water discharge flapper valve (check valve)
39 Drain plug 39a Drain main body 39b Plug 39c Cap 40 Controller 40a Drain control means 42a Stop cock 42b Strainer 42c Branch fitting 44 Wash water pipe top

Claims (9)

A flush toilet flushed with pressurized wash water,
A flush toilet body provided with a drain trap line that extends obliquely upward from the bottom of the bowl part and the bowl part and then descends to regulate the water level of the bowl part;
A water storage tank for storing washing water for cleaning the bowl part, the overflow edge formed higher than the overflow edge of the bowl part,
Tank water supply means for supplying cleaning water to the water storage tank up to a predetermined water storage level,
A pressurizing pump that pressurizes the wash water stored in the water storage tank and pumps it to the bowl portion;
A washing water pipe formed between the pressurizing pump and the bowl part, the washing water pipe top being positioned at a position higher than the stored water level and the stored water level and lower than the overflow edge of the water storage tank;
A vacuum breaker provided in the washing water conduit between the water storage tank and the bowl portion, and sucking air into the top of the washing water pipeline;
A flush toilet characterized by having.   The flush toilet according to claim 1, wherein the predetermined water storage level is higher than the stored water level and lower than the top of the flush water pipe.   The flush toilet according to claim 1 or 2, further comprising a check valve provided in a flush water line between the water storage tank and the pressurizing pump.   4. A washing water conduit for communicating the water storage tank and the pressure pump is connected to a lower portion of the water storage tank, and further has a water drain plug provided in the washing water conduit. The flush toilet according to Item.   The flush toilet according to claim 4, wherein the check valve and the water drain plug are configured as one assembly, and the check valve is also removed together by removing the water drain plug.   The flush toilet according to any one of claims 1 to 5, further comprising a drainage passage for discharging flush water overflowing from an overflow edge of the water storage tank to the bowl portion.   Furthermore, it has a drainage control means, this drainage control means prohibits the water supply to the said water storage tank, operates the said pressurization pump, and discharges the wash water in the said water storage tank to the said bowl part. The flush toilet according to any one of claims 1 to 6.   8. The drainage control means operates the pressure pump so that the wash water in the water storage tank is discharged to the bowl portion at a flow rate that does not cause siphoning in the drain trap pipe. Flush toilet.   Furthermore, it has a bowl portion water supply means for supplying cleaning water to the bowl portion without going through the water storage tank, and the drainage control means discharges the cleaning water in the water storage tank to the bowl portion, The flush toilet according to claim 7, wherein the bowl water supply means is operated to seal the drain trap pipe.

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