JP5130678B2 - Flush toilet - Google Patents

Description

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

  In recent years, so-called water direct pressure flush toilets that supply wash water directly from the water supply have begun to spread. Since this water direct pressure flush toilet does not require a tank to store all of the wash water for one wash, it has the advantage that the toilet can be made compact, but it is sufficient in areas with low tap water pressure. There is a problem that it is difficult to supply cleaning water at a high flow rate and cannot be installed.

  Japanese Patent Laying-Open No. 2005-264469 (Patent Document 1) describes a flush toilet. In this flush toilet, the flush water is discharged from the rim spout by the water supply pressure of the water supply supplying the flush water, and the jet Pressurization by a pump is performed for water discharged from the water outlet. That is, in this flush toilet, the wash water supplied from the water supply is stored in a water storage tank, and the wash water in the water storage tank is pressurized by a pump and discharged from the jet spout when washing the toilet bowl. According to the flush toilet described in JP-A-2005-264469, it is possible to install the direct water pressure flush toilet in an area where the tap water pressure is low.

  On the other hand, in the flush toilet of the type described in Japanese Patent Application Laid-Open No. 2005-264469, in which the water discharge is pressurized by a pump, the flow rate of water discharged from the jet water outlet can be greatly increased, and the siphon phenomenon is generated in a short time. It is possible to constitute a flush toilet that can discharge filth. Accordingly, there is a possibility that the discharge time of cleaning water can be shortened and the amount of cleaning water required for one toilet cleaning can be reduced.

JP 2005-264469 A

However, in the flush toilet described in Japanese Patent Application Laid-Open No. 2005-264469, when the flow rate of water discharged from the jet spout is increased, there is a problem that a very loud siphoning sound such as “gobogobo” is generated at the end of the siphon action.
Accordingly, an object of the present invention is to provide a flush toilet capable of reducing the amount of flush water required for one toilet flushing while preventing the occurrence of a loud siphoning sound.

In order to solve the above-described problems, the present invention is a flush toilet that is washed with pressurized wash water, and includes a bowl portion in which a rim spout and a jet spout are formed, and a drain trap conduit. Pressurizing pump that pressurizes flushing water from the flush toilet body and jet spout and sets the maximum flow rate of the flushing water to 75 liters / minute or more, and stores flushing water to be pressurized by the pressurizing pump To start the water discharge from the water storage tank, the rim spout and the jet spout, and to control the output of the pressure pump when the water discharge from the jet spout is terminated, so that the siphon sound is reduced to, possess a cleaning control means for gradually decreasing the water discharge flow rate from the jet water spouting port, the washing water discharged from the rim water spouting port is spouted by water main supply pressure for supplying the washing water, washing The control means starts water discharge from the rim water discharge port, then starts water discharge from the jet water discharge port, and then while the water discharge from the jet water discharge port is gradually reduced, the second time from the rim water discharge port It is characterized by starting water discharge .

  In the present invention configured as described above, the cleaning control means starts water discharge from the rim spout of the flush toilet body and controls the pressurizing pump to pressurize the cleaning water in the water storage tank and The bowl is washed by discharging water from the water outlet. In addition, when ending the water discharge from the jet water outlet, the cleaning control unit controls the output of the pressurizing pump to gradually decrease the water discharge flow rate from the jet water outlet.

According to the present invention configured as above, since the water discharge flow rate is gradually reduced when the water discharge from the jet water discharge port is terminated, when toilet flushing is performed for a short time with a large flow of jet water discharged by the pressurizing pump. However, there is no sudden siphon cut. Thereby, it is possible to realize a flush toilet that can be washed with a small amount of washing water while reducing the siphoning sound generated at the end of the siphon phenomenon.
Moreover, according to the present invention configured as described above, the siphon phenomenon can be generated rapidly, thereby shortening the toilet cleaning time and the amount of cleaning water required for cleaning.
Further, according to the present invention configured as described above, since the wash water from the rim spout is spouted by the water supply pressure, the wash water discharged from the rim spout needs to be stored in the water storage tank. In addition, the volume of the water storage tank can be reduced, and the flush toilet can be made compact. Moreover, according to this invention comprised in this way, the flow rate of the water discharge from a rim water discharge port, the water discharge from a jet water discharge port, a start time, etc. can be set arbitrarily.
Further, according to the present invention configured as described above, since the second water discharge from the rim water discharge port is started while the water discharge from the jet water discharge port is gradually reduced, the washing flowing into the drain trap pipe The decrease in water becomes more gradual, and siphon sound can be further reduced.

  In the present invention, preferably, the cleaning control unit starts water discharge from the jet water discharge port after starting water discharge from the rim water discharge port and before stopping water discharge from the rim water discharge port.

  According to the present invention configured as described above, since the water discharge from the jet water outlet is started before the water discharge from the rim water outlet is stopped, the pressurizing pump generated at the start of the water discharge from the jet water outlet Is masked by the water discharge sound from the rim spout, and the start-up sound of the pressurizing pump can be made inconspicuous. Thereby, the usability of the flush toilet can be improved.

  In the present invention, preferably, the maximum flow rate of the wash water discharged from the jet spout is set to a flow rate at which the siphon phenomenon occurring in the drain trap pipe is sustained.

  According to the present invention configured as described above, since the maximum flow rate of the wash water discharged from the jet spout is set to a large flow rate that can sustain the siphon phenomenon, only the wash water from the jet spout is used. A siphon phenomenon can be generated, whereby a siphon phenomenon can be generated rapidly. In addition, by rapidly generating the siphon phenomenon, it is possible to shorten the toilet cleaning time, reduce waste water, and reduce the amount of cleaning water required for cleaning.

  According to the flush toilet of the present invention, it is possible to reduce the amount of washing water required for one toilet flushing while preventing the generation of a loud siphon sound.

  Next, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a right side view of a flush toilet according to the present embodiment. FIG. 2 is a top view of a flush toilet according to the present embodiment, and FIG. 3 is a left side view. FIG. 4 is a perspective view of the flush toilet according to the present embodiment as seen from the upper right rear side, and FIG. 5 is a perspective view seen from the upper left rear side. 6 is a cross-sectional view taken along the line VI-VI in FIG. FIG. 7 is a block diagram showing a water supply system for rim water discharge and jet water discharge. 2 to 6 show the flush toilet according to the present embodiment with the toilet seat, the cover, the local cleaning device, and the side panel removed.

  As shown in FIG. 1, a flush toilet 1 according to an embodiment of the present invention is disposed 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. It has the cover 6 and the local washing | cleaning apparatus 8 arrange | positioned in the back upper part of the flush toilet main body 2. FIG. 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 extends downward to be 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 embodiment of the present invention is directly connected to a water supply that supplies the wash water, and the wash water is discharged from the rim spout 18 by the water supply pressure. 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 FIGS.
As shown in FIGS. 2 to 7, the function unit 10 includes a constant flow valve 20, a rim water discharge electromagnetic valve 22, a rim water discharge vacuum breaker 24, and a rim water discharge flapper as a water supply system for rim water discharge. A valve 26 is incorporated. Further, the functional unit 10 includes a tank water supply electromagnetic valve 28, a tank water supply vacuum breaker 30, a water storage tank 32, a pressurizing pump 34, and a jet water discharge vacuum breaker 36 as a water supply system for jet water discharge. A jet water spouting flapper valve 38 is incorporated. Furthermore, the function unit 10 incorporates a controller 40 (FIG. 7) that is a cleaning control means for controlling the rim water discharge electromagnetic valve 22, the tank water supply electromagnetic 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 branch fitting 42b, and the strainer 42c (shown in FIG. 7) to a predetermined flow rate or less. Yes. 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 is branched into two, one connected to the rim water discharge electromagnetic valve 22 and the other connected to the tank water supply electromagnetic valve 28. In the present embodiment, the constant flow valve 20 is disposed on the left rear side of the flush toilet body 2.

  The electromagnetic valve 22 for rim water discharge is opened and closed by a control signal from the controller 40, and is configured to discharge and stop washing water from the rim water discharge port 18. In the present embodiment, the rim water spouting electromagnetic valve 22 is arranged on the rear left side of the flush toilet main body 2 in the same manner as the constant flow valve 20.

  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 rim water discharge electromagnetic valve 22 to the rim water discharge port 18, and prevents backflow of the wash water from the rim water discharge port 18. ing. 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. In the present embodiment, the rim water spouting vacuum breaker 24 is disposed above the drain trap pipe 14 at the rear center of the flush toilet body 2.

  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. In the present embodiment, the rim water spouting flapper valve 26 is disposed above the jet water spouting flapper valve 38 on the rear left side of the flush toilet body 2.

  The tank water supply solenoid valve 28 is configured to be opened and closed by a control signal from the controller 40 to supply and stop the wash water to the water storage tank 32. In the present embodiment, the tank water supply electromagnetic valve 28 is arranged on the rear left side of the flush toilet main body 2, similarly to the constant flow valve 20.

  The tank water supply vacuum breaker 30 is disposed in the middle of the tank water supply path 32 a that guides the wash water that has passed through the tank water supply electromagnetic valve 28 to the water storage tank 32, and prevents backflow from the water storage tank 32 of the wash water. Further, the tank water supply vacuum breaker 30 is disposed about 25.4 mm (about 1 inch) above the upper end surface of the bowl portion 12 and reliably prevents backflow. In the present embodiment, the tank water supply vacuum breaker 30 is disposed above the drain trap pipe 14 at the rear center of the flush toilet body 2.

  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, as shown in FIG. 6, the water storage tank 32 is disposed so as to extend from the rear right side of the flush toilet main body 2 to the upper part of the drain trap pipe 14 at the center of the rear of the flush toilet main body 2. And has an internal volume of about 3 liters. A resin mounting frame 2a, which is a mounting portion, is fixed to the rear of the flush toilet main body 2. The mounting frame 2a is configured separately from the flush toilet main body 2, and includes a water storage tank 32. It is formed in a substantially rectangular shape so as to surround the periphery of. The water storage tank 32 is suspended from the mounting frame 2a by engaging the flange portion at the upper end with the mounting frame 2a.

  Furthermore, in this embodiment, the front end of the tank water supply channel 32a is opened near the bottom of the water storage tank 32, and water is supplied to the water storage tank 32 with the front end of the tank water supply channel 32a submerged. The noise at the time is reduced. In addition, a float switch 32b is disposed inside the water storage tank 32, and is configured to detect the water level in the water storage tank 32. The float switch 32b is turned on when the water level in the water storage tank 32 reaches a predetermined water storage water level, and the controller 40 is configured to detect this and close the tank water supply electromagnetic valve 28.

  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. In the present embodiment, the pressurizing pump 34 is disposed below the water storage tank 32, that is, on the right rear side of the flush toilet body 2 and on the side of the drain trap pipe 14. As shown in FIG. 4, two U-shaped metal plates 32c extending downward are attached to the bottom surface of the water storage tank 32, and the pressurizing pump 34 is connected to the water storage tank 32 by the metal plates 32c. It is hung downward.

  The pressurizing pump 34 includes an impeller 34a that pressurizes the cleaning water and a motor 34b (FIG. 7) that drives the impeller 34a. Furthermore, a drain faucet 34c (FIG. 7) is connected to the pressurizing pump 34. By opening the drain faucet 34c, the inside of the water storage tank 32 and the pressurizing pump 34 can be used during maintenance. The washing water can be discharged. A water receiving tray 2b is disposed below the pressurizing pump 34, and is configured to receive condensed water droplets and water leakage.

  Further, as shown in FIG. 4, the water storage tank 32 extends from the water storage tank 32 toward the front of the flush toilet main body 2 and then U-turns and pressurizes the pressure pump 34 via a U-shaped pipe 34d toward the rear. It is connected to the. Further, the wash water pressurized by the pressurization pump 34 flows into the jet water spouting vacuum breaker 36 through the transverse pipe 34e extending across the flush toilet body 2 at the rear side of the drain trap pipe 14. It is configured as follows. 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.

  The jet water spouting vacuum breaker 36 is connected to the downstream side of the pressurizing pump 34 to prevent the water stored in the bowl portion 12 from flowing back to the water storage tank 32 side, and to perform edge cutting between them. It is configured. Thereby, the stored water level in the water storage tank 32 can be set higher than the stored water level in the bowl portion 12. In the present embodiment, the jet water spouting vacuum breaker 36 is disposed on the left side of the drain trap line 14 behind the flush toilet body 2.

  The jet water spouting flapper valve 38 is connected to the downstream side of the jet water spouting vacuum breaker 36 to prevent a backflow from the jet water spout 16 of the cleaning water. In this embodiment, the jet water spouting vacuum breaker 36 and the jet water spouting flapper valve 38 are arranged in series to prevent the backflow of cleaning water more reliably. The cleaning water that has passed through the jet water spouting flapper valve 38 is configured to be discharged from the jet water spouting port 16 through the jet side water supply passage 16a. In the present embodiment, the jet water spouting flapper valve 38 is disposed on the left side of the drain trap pipe 14 behind the flush toilet body 2. That is, the wash water stored in the water storage tank 32 arranged on the right side of the drain trap pipe 14 and pressurized by the pressurizing pump 34 passes through the transverse pipe 34e and is opposite to the drain trap pipe 14. The jet water spouting vacuum breaker 36, the jet water spouting flapper valve 38, and the jet side water supply passage 16a are discharged from the jet water spouting port 16 to the left side.

  In the present embodiment, the jet water spouting flapper valve 38 is disposed below the rim water spouting flapper valve 26 on the left rear side of the flush toilet body 2. Accordingly, the rim-side water supply path 18 a extending from the rim water spouting flapper valve 26 and reaching the rim water discharge port 18 is also disposed on the same side as the jet-side water supply path 16 a with respect to the drain trap pipe 14.

  The controller 40, which is a cleaning control means, sequentially operates the rim water spouting electromagnetic valve 22 and the pressurizing pump 34 by the operation of the toilet cleaning switch (not shown) by the user. The bowl portion 12 is washed by sequentially starting water discharge. Further, after the cleaning is completed, the controller 40 opens the tank water supply solenoid valve 28 to replenish the water storage tank 32 with the cleaning water, and closes the tank water supply solenoid valve 28 when the float switch 32b detects the specified water storage amount. And is configured to stop water supply. Therefore, the tank water supply electromagnetic valve 28 functions as a washing water supply means.

  In addition, the controller 40 has a built-in time measuring means 40a for measuring the time until the float switch 32b detects a predetermined water storage level after the replenishment of the washing water to the water storage tank 32 is started. Furthermore, the controller 40 has a water discharge time adjusting means 40b for adjusting the water discharge time of the wash water from the rim water discharge port 18 based on the time measured by the time measuring means 40a. In addition, the controller 40 performs a freeze prevention operation when there is a risk of freezing in the wash water in the flush toilet 1 and a temperature sensor 40c that is a temperature detection unit that measures the temperature of the room in which the flush toilet 1 is installed. The anti-freezing control means 40d to be executed and a timer 40e for counting the time interval of the anti-freezing operation are provided. Specifically, the controller 40 includes a CPU, a memory, and a program that operates them.

  Next, the configuration of the jet water spouting vacuum breaker 36 will be described with reference to FIG. FIG. 8 is a cross-sectional view of the jet water spouting vacuum breaker 36. As shown in FIG. 8, the jet water spouting vacuum breaker 36 includes a valve body 44 in which a water inlet 44 a and a water outlet 44 b are formed, and a vacuum breaker coma disposed so as to be movable in the vertical direction in the valve body 44. 46 and a vacuum breaker body 48 attached to the valve body 44 and formed with an air opening 48a.

  The water inlet 44a of the valve main body 44 is opened vertically upward, and is connected so as to communicate with the transverse pipe 34e. The water outlet 44b is open in the horizontal direction and is connected to the inlet of the jet water spouting flapper valve 38.

  The vacuum breaker piece 46 has a generally disc-shaped valve body 46a and a shaft 46b extending vertically upward from the center of the valve body 46a. Further, a lower surface sealing material 46c for closing the water inlet 44a is attached to the lower surface of the valve body portion 46a, and an upper surface sealing material 46d for closing the atmosphere opening port 48a is attached to the upper surface of the valve body portion 46a.

  The vacuum breaker body 48 is a substantially cylindrical member, and an air opening 48 a is formed at the lower end thereof, and the lower part is fitted into the valve body 44. Further, on the central axis of the vacuum breaker main body 48, a guide portion 48b that slidably receives the shaft portion 46b of the vacuum breaker piece 46 is provided. When the shaft portion 46b is received by the guide portion 48b, the vacuum breaker piece 46 has a lower position where the lower surface sealing material 46c closes the water inlet 44a and an upper position where the upper surface sealing material 46d closes the atmosphere opening port 48a. It is slidably supported between them.

  In use, when washing water flows from the water inlet 44a, the vacuum breaker piece 46 is moved to the upper position by the water force, and the atmosphere opening 48a is closed. Thereby, the wash water flowing in from the water inlet 44a is discharged from the water outlet 44b. Further, when the inflow of washing water from the water inlet 44a is stopped, the vacuum breaker piece 46 is moved to a lower position by gravity, and the water inlet 44a is closed. Thereby, the reverse flow of the washing water from the water outlet 44b to the water inlet 44a is prevented. Further, since the water outlet 44b communicates with the air opening port 48a, the water inlet 44a and the water outlet 44b are cut off, and the water level of the water storage tank 32 communicated with the water inlet 44a and the water level of the bowl portion 12 communicated with the water outlet 44b are interlocked. No longer.

  Here, the structure of the jet water discharge vacuum breaker 36 has been described, but the rim water discharge vacuum breaker 24 and the tank water supply vacuum breaker 30 also have the same structure.

  Next, with reference to FIG. 9 thru | or FIG. 13, the removal procedure of the water storage tank 32 and the pressurization pump 34 at the time of a maintenance is demonstrated. FIGS. 9 to 13 are a perspective view and a side view showing a procedure for taking out the water storage tank 32 and the pressurizing pump 34 integrally above the flush toilet body 2.

  First, as shown in FIG. 9, when removing the water storage tank 32 and the pressure pump 34, the toilet seat 4, the cover 6, and the local cleaning device 8 attached on the flush toilet body 2 are removed, and the functional unit is removed. The top of 10 is exposed. Next, as shown in FIG. 10, the side panels 10 a attached to both sides of the functional unit 10 are removed. Next, as shown in FIG. 11, the rim water discharge vacuum breaker 24, the tank water supply vacuum breaker 30, and the jet water discharge vacuum breaker 36 disposed above the water storage tank 32, and the pipes connected thereto are arranged. Remove. Furthermore, the screw which fixes the flange part of the water storage tank 32 to the attachment frame 2a is removed.

  Next, as shown in FIG. 12, the side surfaces of the functional unit 10 exposed by removing the side panels 10a from the connection units 50a and 50b of the U-shaped pipe 34d connecting the water storage tank 32 and the pressure pump 34. Insert and remove your hand. Similarly, the connection part 50c of the pressurization pump 34 and the cross pipe 34e is removed. Further, an electrical connector (not shown) connected to the pressurizing pump 34 is also removed. Further, as shown in FIG. 13, the water storage tank 32 suspended from the attachment frame 2 a is pulled up above the flush toilet body 2 and removed. Thereby, the pressurization pump 34 suspended from the water storage tank 32 by the metal plate 32c is also removed integrally.

  Next, with reference to FIG. 14 thru | or FIG. 16, the effect | action of the flush toilet 1 by embodiment of this invention is demonstrated. FIG. 14 is a graph showing the timing at which each part operates when the flush toilet 1 is washed. The rim water discharge solenoid valve 22, the tank water supply solenoid valve 28, the float switch 32b, and the pressurization pump 34 are arranged in order from the top. The operation timing is shown. FIG. 15 is a flowchart showing the cleaning operation of the flush toilet 1.

  First, when a toilet flushing switch (not shown) is operated in the standby state (step S0 in FIG. 15), the process proceeds to step S1, and the first rim water discharge is started. That is, when the user operates the toilet flushing switch (not shown) at time t0 in FIG. 14, the controller 40 sends a signal to the rim water discharge electromagnetic valve 22 to open it, and the rim water discharge port 18 is supplied by the water supply pressure. The washing water is discharged from. When the rim water discharge 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 branch fitting 42b, and the strainer 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 further passes through the rim water discharge electromagnetic valve 22 disposed on the left side of the flush toilet body 2 and above the drain trap pipe 14 at the center of the flush toilet body 2 behind. The rim water spouting vacuum breaker 24 is reached.

  Further, the wash water that has passed through the rim water spouting vacuum breaker 24 flows into the rim water spouting flapper valve 26 disposed on the left rear side of the flush toilet main body 2 and then flows toward the front of the flush toilet main body 2. The water is discharged from a rim water spouting port 18 that is opened on the rear left side of the upper portion of the bowl portion 12 through the side water supply passage 18a. 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 passed, the process proceeds to step S2 where jet water spouting is started. That is, the controller 40 sends a signal to the pressurization pump 34 to activate it at time t1 in FIG. When the pressurization pump 34 is activated, the wash water stored in the water storage tank 32 is pressurized. The washing water pressurized by the pressure pump 34 disposed on the right rear side of the flush toilet main body 2 flows to the opposite side of the drain trap pipe 14 through the transverse pipe 34e, and then the right side of the drain trap pipe 14 To the jet water spouting vacuum breaker 36. The wash water that has passed through the jet water spouting vacuum breaker 36 flows into a jet water spouting flapper valve 38 disposed under the rim water spouting flapper valve 26 on the left side of the flush toilet main body 2. The washing water that has passed through the jet water spouting flapper valve 38 flows toward the front of the flush toilet main body 2, passes through the jet-side water supply passage 16a below the rim-side water supply passage 18a, and opens at the bottom of the bowl portion 12. It is discharged from the jet spout 16.

  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 maximum flow rate of the cleaning water discharged from the jet spout 16 is about 75 to 110 liters / minute.

  After a predetermined time has elapsed, the controller 40 sends a signal to the rim water discharge electromagnetic valve 22 to close it at time t2 in FIG. 14 and stops water discharge from the rim water discharge port 18. That is, from time t1 to t2, water discharge from the jet water discharge port 16 and water discharge from the rim water discharge port 18 are simultaneously performed. When the pressurization pump 34 is activated during water discharge from the water discharge from the rim water discharge port 18 and the water discharge from the jet water discharge port 16 is started, the start-up sound of the pressure pump 34 is masked by the sound of the rim water discharge and is conspicuous Disappear.

  When the pressurization pump 34 is activated and the cleaning water in the water storage tank 32 is discharged from the jet water outlet 16, the water level in the water storage tank 32 is lowered. The float switch 32b disposed in the water storage tank 32 is turned off at time t3 in FIG. 14, and it is detected that the water level has decreased.

  Next, at time t <b> 4 in FIG. 14, the controller 40 sends a signal to the pressurizing pump 34 to start gradually decreasing the rotation speed of the motor 34 b built in the pressurizing pump 34. Thereby, the water discharge flow rate from the jet water discharge port 16 is also gradually reduced substantially linearly with respect to time.

  Next, the process proceeds to step S3 in FIG. 15, and the second rim water discharge is started. That is, at time t <b> 5 in FIG. 14, the controller 40 sends a signal to the rim water discharge electromagnetic valve 22 to open it, and starts the second water discharge from the rim water discharge port 18. Thereby, the water discharge from the rim water discharge port 18 is superimposed on the water discharge from the jet water discharge port 16 where the water discharge flow rate is gradually decreasing. Here, while water discharge is performed at the maximum flow rate from the jet spout 16, the flow rate of the wash water discharged from the drain trap pipe 14 and the flow rate of the wash water flowing from the jet spout port 16 are substantially equal. Therefore, the siphon phenomenon in the drain trap pipe 14 is sustained and is not interrupted. Further, by gradually decreasing the water discharge flow rate from the jet water discharge port 16 from the maximum flow rate, it is possible to prevent the occurrence of a loud siphon breakage sound due to a sudden break in the siphon phenomenon. In addition, by superimposing water discharged from the rim water spouting port 18, the decrease in the water discharge flow rate becomes more gradual, and the sound when the siphon phenomenon is interrupted is further reduced.

  Next, the rotational speed of the gradually decreasing motor 34b becomes zero at time t6 in FIG. 14, and the pressurizing pump 34 stops. By operating the pressurizing pump 34 between times t1 and t6, 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, the vacuum breaker piece 46 (FIG. 8) of the jet water spouting vacuum breaker 36 closes the water inlet 44a, and the stored water in the bowl portion 12 and the wash water in the water storage tank 32 are separated. In the present embodiment, the controller 40 controls the pressurization pump 34 so that the water discharge flow rate is gradually decreased after the water discharge from the jet water outlet 16 at the maximum flow rate for about 2 seconds, and the water discharge flow rate becomes zero in about 1 second. doing. Preferably, after the water is discharged at the maximum flow rate for about 1.5 to 2 seconds, the water discharge flow rate is controlled to be zero in about 1 to 5 seconds.

  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 elapses, the inside of the bowl portion 12 reaches a predetermined overflow water level. At time t <b> 7 in FIG. 14, the controller 40 sends a signal to the rim water discharge electromagnetic valve 22 to close it, and stops the second water discharge from the rim water discharge port 18. In the present embodiment, the time from the start of toilet cleaning (time t0 in FIG. 14) to the end of the second rim water discharge (time t7 in FIG. 14) is about 14 seconds, and this toilet cleaning time is It is about 10 seconds shorter than the cleaning time of a normal water direct pressure toilet. In the flowchart shown in FIG. 15, for the sake of simplicity, it is described that jet water discharge is started after the first rim water discharge, and the second rim water discharge is executed after the jet water discharge. In more detail, as shown in FIG. 14, there is a period in which each water discharge is superimposed.

  Next, the process proceeds to step S4 in FIG. 15, and the replenishment of the wash water to the water storage tank 32 is started, and the time measuring means 40a built in the controller 40 Start replenishment time measurement. That is, at the time t8 when a predetermined water supply waiting time has elapsed after the water discharge from the rim water discharge port 18 has stopped, the controller 40 sends a signal to the tank water supply electromagnetic valve 28 to open it. When the tank water supply electromagnetic valve 28 is opened, the washing water flowing in from the water inlet 20a passes through the tank water supply electromagnetic valve 28 and the tank water supply channel 32a arranged on the left rear side of the flush toilet body 2 to be washed with water. It flows into the tank water supply vacuum breaker 30 disposed above the drain trap pipe 14 at the center of the back of the toilet body 2. The wash water that has passed through the tank water supply vacuum breaker 30 flows to the right side of the drain trap pipe 14 and flows into the water storage tank 32 from the tip of the tank water supply path 32 a that extends to the vicinity of the bottom of the water storage tank 32. Since the front end of the tank water supply path 32a from which the cleaning water flows out is substantially submerged in the water storage tank 32, noise when the cleaning water flows into the water storage tank 32 is reduced.

  Next, in step S6 of FIG. 15, it is determined whether or not the float switch 32b in the OFF state is turned on. If it is in the OFF state, the process of step S6 is repeated. When the wash water flows into the water storage tank 32 and the water level in the water storage tank 32 reaches the specified water storage amount, the float switch 32b is turned on (time t9 in FIG. 14). When the float switch 32b is turned on, the process proceeds to step S7, and the tank water supply electromagnetic valve 28 is closed. That is, the controller 40 sends a signal to the tank water supply electromagnetic valve 28 to close it. Subsequently, it progresses to step S8 and the time measuring means 40a complete | finishes the measurement of water replenishment time.

  Next, in step S9, the second rim water discharge time (t5 to t7 in FIG. 14) when the toilet flushing is performed next is determined by the water discharge time adjusting means 40b built in the controller 40. First, the water discharge time adjusting means 40b calculates the moving average value of the past 50 times of the water replenishment time measured by the time measuring means 40a. That is, the average of the last 50 times of the water replenishment time Te−Ts, which is the elapsed time from the time Ts (t8 in FIG. 7) when the tank water supply electromagnetic valve 28 is opened to the time Te (t9 in FIG. 7) is closed. The value Tav is calculated. When the average value Tav is less than 5 seconds, the water discharge time adjusting means 40b determines that the flush toilet 1 is installed in an area of a water supply pressure of 0.07 MPa or more, which is a normal pressure. Moreover, when the average value Tav is 5 seconds or more and less than 7 seconds, the water discharge time adjusting means 40b determines that the flush toilet 1 is installed in an area where the water supply pressure is low. Furthermore, when the average value Tav is 7 seconds or more, the water discharge time adjusting means 40b determines that the flush toilet 1 is installed in an ultra-low pressure area where the water supply pressure is 0.03 MPa or less.

  Further, when it is determined that the flush toilet 1 is installed in an area of normal pressure, the water discharge time adjusting means 40b sets the second rim water discharge time at the next toilet flush to 3 seconds. Further, the water discharge time adjusting means 40b sets the second rim water discharge time to 4 seconds when it is determined to be a low pressure area, and to 5.5 seconds when it is determined to be an extremely low pressure area. As a result, in the area where the water supply pressure is high, the rim water is discharged for a long time, and the cleaning water is wasted, or in the area where the water supply pressure is low, the rim water is not discharged for a sufficient period of time. Can be prevented.

Further, as described above, the water discharge time adjusting means 40b sets the second rim water discharge time in the next cleaning based on the average value Tav of the latest 50 water supply times in the past, When the washing is less than 50 times, an average value Tav is calculated by averaging all the past water replenishment times. Furthermore, when the toilet bowl is washed for the first time after the flush toilet 1 is installed, the second rim water discharge time is set to 5.5 seconds so that the washing water does not run out.
In step S9, when the second rim water discharge time when the toilet flushing is performed next time is determined, the process returns to the standby state in step S0.

  Next, with reference to FIG. 16, the operation of the freeze prevention control means 40c built in the controller 40 will be described. FIG. 16 is a flowchart showing the process of the freeze prevention operation of the flush toilet 1.

  First, in the flush toilet 1, the process of step S101 is executed following step S100, which is a standby state in which toilet cleaning is not executed. In step S101, it is determined whether or not the temperature in the toilet room measured by the temperature sensor 40c of the controller 40 is equal to or lower than a predetermined freeze prevention operating temperature. When the temperature in the toilet room is higher than the freeze prevention operation temperature, the freeze prevention operation after step S102 is not executed, and the process returns to step S100 and the process of step S101 is repeatedly executed. In this embodiment, the freeze prevention operating temperature is set to 5 ° C. The freeze prevention operation is also executed when the user sets the freeze prevention operation with an operation switch (not shown) provided in the flush toilet 1. In the present embodiment, the freeze prevention operation is configured to be set by a special operation of an operation switch (not shown). That is, the freeze prevention operation is set by simultaneously operating a plurality of operation switches (not shown) for executing other functions at the same time or by continuously pressing them for a predetermined time.

  Next, when the temperature in the toilet room is equal to or lower than the freeze prevention operation temperature, the process of step S102 is executed. In step S102, the freeze prevention control means 40c opens the rim water discharge electromagnetic valve 22. By opening the rim water discharge electromagnetic valve 22, the wash water supplied from the water supply is provided with a water stop cock 42 a, a branch fitting 42 b, a strainer 42 c, a constant flow valve 20, a rim water discharge electromagnetic valve 22, by the water supply pressure. Water is discharged from the rim water spouting port 18 into the bowl portion 12 at a flow rate of about 15 liters / minute through the rim water discharging vacuum breaker 24, the rim water discharging flapper valve 26, and the rim side water supply passage 18a. Thereby, the wash water staying in these water supply systems is moved, and the freezing thereof is prevented. After about 1 second, step S103 is executed, and the freeze prevention control means 40c closes the rim water discharge electromagnetic valve 22.

  Next, in step S104, the freeze prevention control means 40c rotates the pressure pump 34 at a low speed. When the pressurizing pump 34 is rotated, the wash water in the water storage tank 32 passes through the pressurizing pump 34, the jet water spouting vacuum breaker 36, the jet water spouting flapper valve 38, and the jet water supply passage 16a, and the jet water spouting port. 16 is discharged. Thereby, the wash water staying in these water supply systems is moved, and the freezing thereof is prevented. After about 20 seconds, which is a predetermined antifreezing pump operating time, step S105 is executed, and the antifreezing control means 40c stops the pressurizing pump 34. In the present embodiment, the pressurizing pump 34 is operated at the rotation speed at which the wash water is discharged from the jet water outlet 16 at a flow rate of about 0.7 liter / min. By discharging water from the jet water outlet 16 at such a low flow rate, the washing water staying in the water supply system can be moved without causing a siphon phenomenon in the drain trap pipe 14. As a result, noise due to the occurrence of the siphon phenomenon is prevented, and the waste of washing water is minimized.

  Next, in step S106, the state of the float switch 32b is determined. The amount of wash water stored in the water storage tank 32 is reduced by operating the pressure pump 34 for about 20 seconds. The float switch 32b provided in the water storage tank 32 is turned off when the amount of stored water is equal to or less than a predetermined amount of stored water. If the float switch 32b is OFF, the process proceeds to step S107, and in step S107, the freeze prevention control means 40d opens the tank water supply electromagnetic valve 28 and replenishes the wash water in the water storage tank 32. That is, the float switch 32b and the tank water supply solenoid valve 28 function as a water storage amount maintaining means. By opening the tank water supply electromagnetic valve 28, the wash water supplied from the water supply is the stop cock 42 a, the branch fitting 42 b, the strainer 42 c, the constant flow valve 20, the tank water supply electromagnetic valve 28, and the tank water supply vacuum. Water is supplied into the water storage tank 32 through the breaker 30. Thereby, the wash water staying in these water supply systems is moved, and the freezing thereof is prevented.

  When the amount of water stored in the water storage tank 32 increases to a predetermined water storage amount due to the supply of water into the water storage tank 32 and rises to a predetermined water level, it is detected in step S106 that the float switch 32b is turned on. If it is determined that the float switch 32b has been turned ON, the process proceeds to step S108, and in step S108, the freeze prevention control means 40d closes the tank water supply electromagnetic valve 28. Next, in step S109, the timer 40e built in the controller 40 starts measuring the time until the freeze prevention operation is next executed. In step S110, after the start of measurement by the timer 40e, it is determined whether or not a predetermined time interval of the freeze prevention operation has elapsed. In the present embodiment, 10 minutes is set as the time interval for the freeze prevention operation.

  The process in step S110 is repeatedly executed when 10 minutes as the time interval of the freeze prevention operation has not elapsed, and when 10 minutes have elapsed, the process returns to the standby state in step S100. When returning to the standby state of step S100, the process proceeds to step S101 again, and it is determined whether or not the temperature measured by the temperature sensor 40c has risen to a temperature higher than the freeze prevention operating temperature. If the temperature in the toilet room is still below the freeze prevention operating temperature, the process proceeds to step S102 and the above process is repeated. On the other hand, when the temperature in the toilet room has risen to a temperature higher than the freeze prevention operation temperature, the process returns to step S100, and the determination in step S101 is repeatedly executed.

  In addition, even when the flush toilet 1 is manually set to perform the freeze prevention operation, the freeze prevention operation after step S102 is executed. This freeze prevention operation is repeated until the user cancels the setting of the freeze prevention operation by an operation switch (not shown). As described above, when the temperature in the toilet room is lower than the freeze prevention operation temperature and when the freeze prevention operation is set by the user, the jet water outlet 16 and the rim outlet 18 Water discharge is executed intermittently at intervals of about 10 minutes. Thereby, the wash water staying in each part of the flush toilet 1 is moved, and its freezing is prevented.

  According to the flush toilet of the embodiment of the present invention, when flushing from the jet spout is completed while the toilet flushing is performed in a short time with a large amount of jet spout by a pressurizing pump, the spout flow rate is gradually decreased. So there is no sudden siphon cut. As a result, the toilet bowl can be washed with a small amount of washing water, and the siphon break noise generated at the end of the siphon phenomenon can be reduced.

  Further, according to the flush toilet of the present embodiment, since the wash water from the rim spout is spouted by the water supply pressure, it is necessary to store the wash water discharged from the rim spout in the water storage tank. In addition, the volume of the water storage tank can be reduced and the flush toilet can be made compact. Moreover, by directly supplying the rim water discharge from the water supply, the flow rate and the start time of the water discharge from the rim water discharge port and the water discharge from the jet water discharge port can be arbitrarily set.

  Furthermore, according to the flush toilet of the present embodiment, since the second water discharge from the rim spout is started while the water discharged from the jet spout is gradually reduced, the wash water flowing into the drain trap pipe The decrease in noise becomes more gradual, and siphon break noise can be further reduced.

  Further, according to the flush toilet of the present embodiment, since water discharge from the jet water outlet is started before water discharge from the rim water outlet is stopped, pressurization generated at the start of water discharge from the jet water outlet The pump start-up sound is masked by the water discharge sound from the rim spout, and the pressurization pump start-up sound can be made inconspicuous. Thereby, the usability of the flush toilet can be improved.

  Furthermore, according to the flush toilet of this embodiment, the maximum flow rate of the wash water discharged from the jet spout is set to a large flow rate that can generate a siphon phenomenon only by the wash water from the jet spout. Therefore, the siphon phenomenon can be generated rapidly. Thereby, the time of toilet bowl washing | cleaning can be shortened and the quantity of the washing water required for washing | cleaning can be reduced.

It is a right view of the flush toilet according to an embodiment of the present invention. It is a top view of a flush toilet according to an embodiment of the present invention. 1 is a left side view of a flush toilet according to an embodiment of the present invention. It is the perspective view which looked at the flush toilet by embodiment of this invention from back right diagonally. It is the perspective view which looked at the flush toilet by embodiment of this invention from back left diagonal. It is sectional drawing which follows the VI-VI line of FIG. It is a block diagram which shows the rim water discharge and the water supply system of jet water discharge. It is sectional drawing of the vacuum breaker for jet water spouting. It is a perspective view which shows the procedure which removes a water storage tank and a pressurization pump. It is a perspective view which shows the procedure which removes a water storage tank and a pressurization pump. It is a perspective view which shows the procedure which removes a water storage tank and a pressurization pump. It is a side view which shows the procedure which removes a water storage tank and a pressurization pump. It is a perspective view which shows the procedure which removes a water storage tank and a pressurization pump. It is a graph which shows the timing which each part act | operates at the time of washing of a flush toilet. It is a flowchart which shows the washing | cleaning effect | action of a flush toilet. It is a flowchart which shows the process of the freeze prevention driving | operation of a flush toilet.

Explanation of symbols

D Drain pipe 1 Flush toilet 2 Flush toilet body 2a Mounting frame 2b Water tray 4 Toilet seat 6 Cover 8 Local cleaning device 10 Functional part 10a Side panel 12 Bowl part 14 Drain trap pipe 16 Jet spout 16a Jet side water supply path 18 Rim water outlet 18a Rim side water supply path 20 Constant flow valve 20a Water inlet 22 Rim water discharge electromagnetic valve 24 Rim water discharge vacuum breaker 26 Rim water discharge flapper valve 28 Tank water supply electromagnetic valve 30 Tank water supply vacuum breaker 32 Water storage tank 32a Tank water supply path 32b Float switch 32c Metal plate 34 Pressure pump 34a Impeller 34b Motor 34c Drain tap 34d U pipe 34e Transverse pipe 36 Jet water discharge vacuum breaker 38 Jet water discharge flapper valve 40 Controller 0a Timekeeping means 40b Water discharge time adjusting means 40c Temperature sensor 40d Freezing prevention control means 40e Timer 42a Stop cock 42b Branch metal fitting 42c Strainer 44 Valve body 44a Water inlet 44b Water outlet 46 Vacuum breaker coma 46a Valve body part 46b Shaft part 46c Material 46d Upper surface sealing material 48 Vacuum breaker body 48a Air release port 48b Guide portion 50a, 50b, 50c Connection portion

Claims (4)

A flush toilet flushed with pressurized flush water,
A bowl portion in which a rim spout and a jet spout are formed, and a flush toilet body provided with a drain trap conduit;
A pressurizing pump that pressurizes the wash water discharged from the jet spout and sets the maximum flow rate of the wash water to 75 liters / minute or more;
A water storage tank for storing cleaning water to be pressurized by the pressure pump;
In order to sequentially start water discharge from the rim water discharge port and the jet water discharge port, and to control the output of the pressure pump when the water discharge from the jet water discharge port is terminated, so that the siphon sound is reduced. , have a, a cleaning control means for gradually decreasing the water discharge flow from the jet water spouting port,
Wash water discharged from the rim spout is spouted by the water supply pressure of the water supply that supplies the wash water, and the cleaning control means starts water discharge from the rim spout and then from the jet spout. A flush toilet, wherein the water discharge is started, and then the second water discharge from the rim water discharge port is started while the water discharge from the jet water discharge port is gradually reduced. The washing control means, after starting the spouting of water from the rim water spouting port, prior to stopping the water discharge from the rim water spouting port, the flush toilet of claim 1, wherein for starting the water discharge from the jet water spouting port . A flush toilet flushed with pressurized flush water,
A bowl portion in which a rim spout and a jet spout are formed, and a flush toilet body provided with a drain trap conduit;
A pressurizing pump that pressurizes the wash water discharged from the jet spout and sets the maximum flow rate of the wash water to 75 liters / minute or more;
A water storage tank for storing cleaning water to be pressurized by the pressure pump;
In order to sequentially start water discharge from the rim water discharge port and the jet water discharge port, and to control the output of the pressure pump when the water discharge from the jet water discharge port is terminated, so that the siphon sound is reduced. , have a, a cleaning control means for gradually decreasing the water discharge flow from the jet water spouting port,
Wash water discharged from the rim spout is spouted by the water supply pressure of the water supply for supplying the wash water, and the cleaning control means starts water discharge from the rim spout and then from the rim spout. A flush toilet characterized by starting water discharge from the jet spout before stopping water discharge . 4. The water washing according to any one of claims 1 to 3 , wherein a maximum flow rate of the washing water discharged from the jet water spouting port is set to a flow rate at which a siphon phenomenon occurring in the drain trap pipe is sustained. toilet bowl.

Images