JP4958070B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet equipped with a water storage tank for storing flush water and a pressurizing pump for pumping water in the water storage tank to the toilet body.

  In recent years, flush toilets have been known in which flush water in a storage tank is pressurized by a pump and supplied to the toilet bowl.

JP 2005-264469 A

However, the present inventors have found that even if the pump drive amount is accurate and the wash water supplied by such a pump is constant, the discharge amount discharged from the water outlet to the toilet, for example, the jet port However, it has been found that the specified water discharge amount may not be obtained due to dimensional errors such as in the jet nozzle.
In recent years, in addition to the toilet bowl and the water storage tank, devices such as a pressurizing pump that pressurizes the wash water, a switching valve that switches between the jet water supply channel side and the rim water supply channel side, and a substrate that controls these operating states, In addition, electrical components such as a warm water washing toilet seat are provided. Along with this, the problem of providing a water storage tank in a smaller space and securing the maximum water discharge amount with a limited capacity of the water storage tank has become clear.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a flush toilet capable of obtaining a prescribed amount of flush water from a smaller storage tank. .

  To achieve the above object, the present invention provides a toilet body, a water storage tank for storing cleaning water for cleaning the toilet body, a tank water supply source for supplying water to the water storage tank, and the water storage A pressure pump that pumps water in the tank to the toilet body, a pump water supply pipe that supplies water from the water storage tank to the pressure pump, a jet side water supply pipe that supplies cleaning water to the jet side, and cleaning water to the rim side A flush toilet comprising a rim-side water supply pipe, and an upper water level detection means for detecting the water level of water supplied to the storage tank by a tank water supply source provided above the storage tank; and One end is opened above the upper water level detection means by a predetermined amount, and an overflow pipe that allows the water in the water storage tank to escape to the jet side water supply path or the rim side water supply path, and after the water level is detected by the upper water level detection means. An additional water supply means for additionally supplying a predetermined amount of water from the water supply source, and a lower water level detection for detecting the water level of the water storage tank provided below the water storage tank and supplied to the pressure pump from the water storage tank The amount of water added by the additional water supply means is set to an amount such that the water level rising by the addition coincides with or exceeds one end of the overflow pipe, and the water level determined by this overflow pipe It is characterized by the fact that the water level is reached and the pressurizing pump is stopped when the water level is detected by the lower water level detecting means.

  In the present invention configured as described above, the height of one end of the upper overflow pipe is almost certainly secured by the additional water supply means for additionally supplying a predetermined amount of water from the tank water supply source after the water level is detected by the upper water level detection means. In addition, when the water level is detected by the lower water level detection means, the pressurization pump is stopped and the pumping of water from the pressurization pump into the storage tank is stopped. The amount of street water can be supplied to the toilet body. In addition, since the reservoir water level can be determined by the height of one end of the overflow pipe, even with a relatively small reservoir tank that keeps the space above the reservoir tank to a minimum, the prescribed amount of water can be secured as described above. I can do it.

Further, in the present invention, preferably, water discharge and water stop of a tank water supply source for supplying water to the water storage tank are performed by a diaphragm valve, and the additional water supply means is a self-closed water discharge amount after the diaphragm valve is closed. Is added as a predetermined amount of water.
In the present invention configured as described above, since the water stop of the tank water supply source for supplying water to the water storage tank is performed by a diaphragm valve, the water stop is stopped slowly, and the water hammer phenomenon at the time of water stoppage Such noise can be suppressed. Furthermore, since the self-closing water discharge amount after the diaphragm valve is closed is additionally supplied as a predetermined amount of water, the self-closing water discharge amount after the diaphragm valve is closed can be effectively used to perform additional water supply.

In the present invention, it is preferable that the water supply port of the pump water supply pipe for supplying water from the water storage tank to the pressurizing pump is opened downward at a position lower than the lower water level detection means by a predetermined amount.
In the present invention configured as above, if the water supply port of the pump water supply pipe is opened downward at a position below a predetermined amount (for example, an amount larger than the inertial water discharge amount of the pressurizing pump which is almost constant each time). In addition, it is possible to prevent the air pressure of the pressurizing pump from being caught by air.

In the present invention, it is preferable that the water supply port of the pump water supply pipe is a check valve that does not restrict the flow of water from the water storage tank to the water supply pipe but restricts the flow of water from the water supply pipe to the water storage tank. A working flapper valve is provided.
In the present invention configured as described above, the flow of water from the water supply pipe to the water storage tank is reliably regulated by the flapper valve with less pressure loss to prevent the water from being discharged from the pressurizing pump. However, it is possible to prevent the air pressure of the pressure pump.

  According to the present invention, it is possible to obtain a predetermined amount of water discharge from a smaller water storage tank.

Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, the structure of a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. 1 is a side view of a flush toilet according to an embodiment of the present invention, FIG. 2 is a plan view of the flush toilet shown in FIG. 1, and FIG. 3 is an overall view of the flush toilet according to an embodiment of the present invention. It is a block diagram.

  As shown in FIGS. 1 and 2, the flush toilet 1 according to the embodiment of the present invention is disposed so as to cover the toilet body 2, the toilet seat 4 disposed on the upper surface of the toilet body 2, and the toilet seat 4. The cover 6 and the local washing | cleaning apparatus 8 arrange | positioned at the back upper part of the toilet bowl main body are provided. Further, a functional unit 10 is disposed behind the toilet body 2, and the functional unit 10 is covered with a side panel 11.

The toilet body 2 includes a bowl portion 12 for receiving filth, a drain trap pipe 14 extending from the bottom of the bowl section 12, a water distribution pipe 15 connected to the lower end of the drain trap pipe 14, and a jet for jetting water. A water discharge port 16 and a rim water discharge port 18 for performing rim water discharge are formed.
The jet spout 16 is formed at the bottom of the bowl portion 12 and is disposed substantially horizontally toward the inlet of the drain trap pipe 14 to discharge the wash water toward the drain trap pipe 14. ing. The rim water spouting port 18 is formed at the upper left rear of the bowl portion 12 and discharges cleaning water along the upper edge of the bowl portion 12.

  The drain trap pipe 14 includes an inlet 14a, a trap ascending pipe 14b that rises from the inlet 14a, and a trap descending pipe 14c that descends from the trap ascending pipe 14b. The trap ascending pipe 14b and the trap descending pipe 14c 14d is the top portion 14d. The above-described water distribution pipe 15 is connected to the lower end of the trap descending pipe 14c.

  The flush toilet 1 according to the present embodiment 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. As for the jet water spouting, as will be described later, the washing water stored in the water storage tank 20 built in the functional unit 10 is pressurized by the pressurizing pump 22 and discharged from the jet water spouting port 16 at a large flow rate. It has become.

Next, the functional part 10 of the flush toilet 1 according to the present embodiment will be described in detail with reference to FIG.
As shown in FIG. 3, the functional unit 10 is provided with a water supply path 24 through which cleaning water is supplied from the water supply. The water supply path 24 has a stop cock 26, a strainer 28, and a branch fitting 30 from the upstream side. A constant flow valve 32, a diaphragm type electromagnetic on-off valve 34, and a water supply path switching valve 36 are provided. The constant flow valve 32 is for restricting the wash water flowing in through the stop cock 26, the strainer 28, and the branch fitting 30 to a predetermined flow rate or less.

  The constant flow valve 32, the electromagnetic on-off valve 34, and the water supply channel switching valve 36 are integrally assembled as a valve unit 37 as shown in FIG. Further, on the downstream side of the water supply path switching valve 36, there are a rim side water supply path 38 for supplying cleaning water to the rim spout 18 and a tank side water supply path 40 for supplying cleaning water to the water storage tank 20. It is connected.

Here, the wash water that has passed through the constant flow valve 32 flows into the electromagnetic on-off valve 34, and the wash water that has passed through the electromagnetic on-off valve 34 is rimmed from the rim water supply path 38 on the rim side by the water supply path switching valve 36. It is supplied to the water storage tank 20 from the water outlet 18 or from the tank side water supply path 40 which is the tank side. The water supply path switching valve 36 can supply wash water to both the rim side water supply path 38 and the tank side water supply path 40 at the same timing, and can switch the ratio of the water absorption amount to the rim side and the tank side arbitrarily. It is a valve.
The opening / closing operation of the electromagnetic opening / closing valve 34 and the switching operation of the water supply channel switching valve 36 are controlled by the controller 62 of the function unit 10. Then, the electromagnetic on-off valve 34 is opened, and the water supply path switching valve 36 communicates with the tank-side water supply path 40 so that water can be supplied to the water storage tank, which corresponds to a tank water supply source.

  A jet-side water supply path 46 is connected to the lower part of the water storage tank 20, and a downstream end of the jet-side water supply path 46 is connected to the jet water outlet 16. Further, the pressurizing pump 22 described above is provided in the middle of the jet side water supply passage 46. The pressurizing pump 22 pressurizes the cleaning water stored in the water storage tank 20 and discharges it from the jet water outlet 16. The rotation speed, operating time, and the like of the pressure pump 22 are controlled by a controller 62 provided in the function unit 10.

  The jet-side water supply path 46 includes an upstream jet-side water supply path 46 a upstream from the pressurizing pump 22 and a downstream-side downstream jet-side water supply path 46 b. Here, as shown in FIG. 3, the downstream jet side water supply passage 46 b first extends upward from the pressurizing pump 22, and a pipe is disposed above the water storage surface A of the bowl portion 12 of the toilet 1. The piping is configured to extend downward. Thus, in the downstream jet side water supply path 46b formed in a convex shape facing upward, the top portion 46c which is the highest part of the convex part is a jet side water supply path from the water storage tank 20 to the jet water outlet 16. It is the highest part of 46. The upstream jet side water supply path 46 a corresponds to a pump water supply pipe that supplies water from the water storage tank 20 to the pressurizing pump 22.

Next, the rim-side water supply passage 38 is provided with a rim water discharge vacuum breaker 48 to prevent backflow of the cleaning water from the rim discharge port 18 when negative pressure is generated in the water supply passage 24. Yes. Further, as shown in FIG. 3, the rim discharge vacuum breaker 48 is disposed above the upper end surface of the bowl portion 12, thereby reliably preventing backflow. Further, the wash water overflowing from the air release portion of the rim water spouting vacuum breaker 48 flows into the water storage tank 20 through the return pipe 50.
The tank side water supply path 40 is also provided with a vacuum breaker 42 as a check valve to prevent the backflow of the wash water from the water storage tank.

Here, the water storage tank 20 is a sealed type water storage tank, and a ball type check valve 43 is provided at a connection portion between the tank side water supply path 40 and the water storage tank 20. The ball check valve 43 causes the ball 90 to rise and close the connection with the tank-side water supply path 40 even when the water storage tank 20 is full. It is designed not to flow backward.
Similarly, a ball type check valve 44 is also provided at the connection portion between the return pipe 50 and the water storage tank 20, so that even when the water storage tank 20 becomes full, the washing water flows back into the return pipe 50. There is nothing to do.

  Furthermore, a jet water spouting flapper valve 56 and a water drain plug 58, which are check valves, are provided in the upstream jet side water supply path 46a of the jet side water supply path 46 (see FIG. 5). The jet water spouting flapper valve 56 and the water drain plug 58 are arranged at a height near the lower end of the water storage tank 20 below the pressurizing pump 22. For this reason, by opening the water drain plug 58 (see FIG. 5), the cleaning water in the water storage tank 20 and the pressure pump 22 can be drained during maintenance or the like.

  Further, by disposing the jet water spouting flapper valve 56 between the water storage tank 20 and the pressurizing pump 22, when the water level in the water storage tank 20 becomes lower than the height of the pressurizing pump 22, washing water is added. The pressure pump 22 flows backward to the water storage tank 20 to prevent the washing water in the pressurizing pump 22 from escaping and the pressurizing pump 22 from idling. A water receiving tray 60 is disposed below the pressurizing pump 22 so as to receive condensed water droplets and water leakage.

Further, an overflow flow path 70 having one end 70a opened and the other end 70b connected to the downstream jet side water supply path 64b is provided above the upper float switch 64a of the water storage tank 20. A flapper valve 72 that is a check valve is attached to the overflow channel 70.
When the water in the water storage tank 20 becomes higher than the opening 70a, the overflow flow path 70 allows the water in the water storage tank 20 to escape to the jet-side water supply passage 46 and the water overflows from the water storage tank 20. It is something to prevent.

  Further, the overflow flow path 70 and the flapper valve 72 prevent backflow from the jet water outlet 16 of the washing water, and can perform edge cutting between them. In addition, since the other end 70b of the overflow channel 70 is provided above the level of the stored water in the bowl portion 12, the backflow from the jet spout 16 of the cleaning water can be more reliably prevented. Yes.

  The operation contents of the electromagnetic on-off valve 34, the water supply channel switching valve 36, the pressurizing pump 22 and the like described above will be described. The controller 62 operates the electromagnetic on / off valve 34 and the water supply channel switching valve 36 by the operation of the toilet flushing switch (not shown) by the user, and first discharges water from the rim water discharge port 18 and continues the rim water discharge while continuing the rim water discharge. Then, the pressure pump 22 is operated to start water discharge from the jet water discharge port, and a siphon action is generated to discharge and wash the accumulated water in the bowl portion 12 together with the filth. Further, the controller 62 continues the rim water discharge even after the operation of the pressurizing pump 22 is stopped, stores the accumulated water in the bowl portion 12, and finishes the cleaning. After the cleaning is completed, the water supply path switching valve 36 is switched to the water storage tank 20 side to supply cleaning water to the water storage tank 20. When the water level in the water storage tank 20 rises and the upper float switch 64a detects a specified water storage amount, the controller 62 closes the electromagnetic valve 34 and stops water supply.

  Next, an upper float switch 64 a and a lower float switch 64 b are arranged inside the water storage tank 20. The upper float switch 64a is turned on when the water level in the water storage tank 20 reaches a predetermined upper position L1, and the controller 62 detects this and closes the electromagnetic switching valve 34. The lower float switch 64b is turned on when the water level in the water storage tank 20 drops to a predetermined lower water level L3, and the controller 62 detects this and stops the pressurizing pump 22.

These operation contents are shown in FIG. FIG. 4 is a time chart showing the basic operation of the flush toilet in the embodiment of the present invention. In addition, in this time chart, illustration of the operation | movement of rim water discharge is abbreviate | omitted, and it is a schematic time chart.
Here, in the embodiment of the present invention, the water level when the water is full is a water flow line WFL (see FIG. 3) as described later. The height of the water flow line WFL coincides with the height of the one end portion 70 a of the overflow channel 70.

  First, as shown in FIG. 4, in a full water state, the pressurization pump 22 operates at the time indicated by t <b> 1, and jet water spouting is started. At this time, the water level in the water storage tank 20 falls below the water flow line WFL. Next, when the jet pumping is performed while the pressurizing pump 22 is operating (time t2), the water level in the water storage tank 20 falls below the upper float switch 64a, and the upper float switch 64a is turned from ON to OFF.

  Next, when the lower float switch 64b is turned from OFF to ON at the time indicated by t3, the pressurizing pump 22 is stopped and the jet water discharge is ended. The flow rate of the pressurizing pump 22 is as large as 70 L / min. Therefore, time control is difficult to keep the amount of water supplied to the toilet constant, and the pressurization pump 22 is stopped by detection by the lower float switch 64b. Here, the water level in the water storage tank 20 is below the lower float switch 64b due to the operating inertia amount of the pressurizing pump 22. This lower position is shown in FIG. 3 as a water deadline WDL. Since the inertia amount of the pressurizing pump 22 has very little variation, the position of the water deadline WDL is almost the same every time.

  Thereafter, at the time indicated by t4, the diaphragm type electromagnetic on-off valve 34 is operated (OFF → ON), and water supply to the water storage tank is started. At this time, the water level in the water storage tank 20 is the water deadline WDL. Then, the lower float switch 64b is turned from ON to OFF at the time t5 after the electromagnetic opening / closing valve 34 is actuated and a predetermined time.

Thereafter, when the water level in the water storage tank 20 rises to the position of the upper float switch 64a, the upper float switch 64a is turned on and the electromagnetic on-off valve 34 is stopped. Here, in this embodiment, the electromagnetic on-off valve 34 is a diaphragm-type electromagnetic on-off valve that is unlikely to cause a water hammer phenomenon. Therefore, due to the diaphragm type characteristics, a predetermined additional water discharge amount flows into the water storage tank 20 even if the electromagnetic on-off valve 34 is stopped. That is, the electromagnetic on-off valve 34 corresponds to the additional water supply means of the present invention. In the present embodiment, the predetermined additional water discharge amount is set so as to exceed the upper float switch 64 a and the one end portion 70 a of the overflow channel 70.
As the additional water supply means, an electric ball valve is used instead of the electromagnetic on-off valve 34, and a predetermined delay time is required from when the upper float switch 64a is turned on until the electric ball valve is closed. It can also be configured to supply water for the delay time after setting.

  Therefore, as shown at time t7, the water level in the water storage tank 20 exceeds the water flow line WFL after a predetermined time elapses after the electromagnetic on-off valve 34 is stopped (t6). Here, since the water flow line WFL is formed by the one end portion 70 a of the overflow flow path 70, excess water supplied beyond the water flow line WFL flows out to the jet-side water supply path 46. The overflow flow path 70 may be connected to the rim water discharge supply path 38 so that excess water flows out from the rim water discharge port 18. In any case, the surplus water can be used for condensate.

  As described above, in the present embodiment, the predetermined additional water discharge amount is set so as to exceed the upper float switch 64a and the one end portion 70a of the overflow channel 70, and the water level at the start of cleaning is The water flow line WFL is always used. In addition, since the inertial amount of the pressurizing pump 22 has very little variation, the water level at the end of cleaning becomes the water deadline WDL. Therefore, the amount of water discharged to the toilet can be kept constant at all times.

Next, the structure of the water storage tank will be described with reference to FIGS. FIG. 5 is a side cross-sectional view of the structure of the water storage tank according to the embodiment of the present invention when viewed from one side, and FIG. 6 is a side cross-sectional view of the structure of the water storage tank according to the embodiment of the present invention when viewed from the other side. FIG.
First, as shown in FIGS. 5 and 6, the ball check valves 43 and 44 described above are provided above the water storage tank 20. The balls are balls (floating balls) 90 and 92 whose interiors are filled with air, and hook members 94 and 96 for holding the balls 90 and 92 are provided. When the upper space S of the portion protruding upward is filled with air, the balls 90 and 92 are received by the eaves members 94 and 96 to the water outlet 80b and the water passage 50 of the tank side water supply passage 40. The outlet 82b is open. Accordingly, water can be discharged from the water outlet 80b of the tank side water supply passage 40, and water vapor and air can flow out from the water vapor and air outlet 80b.

  Further, when the tank side water supply path 40 which is the primary side of the water channel system becomes negative pressure, the tank side water supply path 40 does not suck the water in the water storage tank 20 but draws air from the vent pipe 50. Since suction is performed, it is possible to prevent the water in the water storage tank 20 from flowing back into the tank-side water supply path 40. On the other hand, when water pressure is applied to the water storage tank 20 from the jet outlet 16 by a rubber cup (not shown) used when the toilet bowl is clogged, the water in the water storage tank 20 rises due to the water pressure, and the ball 90 , 92 is lifted by the buoyancy of itself, and closes the water discharge port 80b and the outlet 82b to prevent the water in the water storage tank 20 from flowing back into the tank side water supply channel 40 and the water flow channel 50.

  Next, as shown in FIG. 5, the upper float switch 64a is attached downward to the lid of the water storage tank 20, and the lower float switch 64b is attached upward to the bottom of the tank. Further, FIG. 6 shows an overflow channel 70 and one end portion 70a opened upward.

  Next, as shown in FIG. 5 and as described above, a jet water spouting flapper valve 56 as a check valve is provided in the upstream jet side water supply passage 46a of the jet side water supply passage 46. The flapper valve 56 is provided in the vicinity of the opening 64d. In FIG. 5, the flapper valve 56 is shown in an open state. Since this flapper valve 56 is a valve with little pressure loss, it is possible to prevent water from leaking in the pipe from the pump water supply port (opening of the upstream jet side water supply passage 64a) 64d to the pump 22. As a result, it is possible to prevent the air pressure of the pressure pump 22 during continuous driving.

  Further, the upstream jet-side water supply path 64a opens downward from the lower float switch 64b, specifically, below the water deadline WDL. Therefore, when the lower float switch 64b is turned from OFF to ON (t3 in FIG. 4), when the pressurizing pump 22 stops, the water corresponding to the inertia amount of the pressurizing pump 22 flows out to the upstream jet side water supply passage 64a. However, it is possible to prevent air from entering the upstream jet side water supply path 64a from the opening 64d. As a result, the air pump 22 can be prevented from being caught by air.

1 is a side view of a flush toilet according to an embodiment of the present invention. It is a top view of the flush toilet shown in FIG. 1 is an overall configuration diagram showing a flush toilet according to an embodiment of the present invention. It is a time chart which shows the basic operation | movement of the flush toilet in embodiment of this invention. It is side surface sectional drawing which looked at the structure of the water storage tank by embodiment of this invention from one side. It is side surface sectional drawing which looked at the structure of the water storage tank by embodiment of this invention from the other side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet seat main body 12 Bowl part 14 Drain trap pipe 16 Jet spout 18 Rim spout 20 Reservoir tank 22 Pressurizing pump 24 Water supply path 38 Rim side water supply path 40 Tank side water supply path 46 Jet side water supply path 46a Upstream Jet side water supply passage 46b Downstream jet side water supply passage 46d Downstream jet side water supply passage opening 43, 44 Ball type check valve 56 Jet flapper valve 64a Upper float switch 64b Lower float switch 70 Overflow passage 72 Flapper valve 80b Water outlet 82b Outlet 86 Upper protruding portion S of water storage tank Upper space of upper protruding portion of water storage tank

Claims (4)

A toilet body, a water storage tank for storing cleaning water for cleaning the toilet body, a pressure pump for pumping water in the water storage tank to the toilet body, and water from the water storage tank to the pressure pump A flush toilet comprising a pump water supply pipe for supplying water, a jet water supply pipe for supplying cleaning water to the jet side, and a rim side water supply pipe for supplying cleaning water to the rim side,
A tank water supply source for supplying water to the water storage tank;
Upper water level detection means for detecting a water level of water supplied into the water storage tank by the tank water supply source provided above the water storage tank;
One end is opened above the upper water level detection means by a predetermined amount, and an overflow pipe that allows the water in the water storage tank to escape to the jet side water supply path or the rim side water supply path,
Additional water supply means for additionally supplying a predetermined amount of water from the tank water supply source after water level detection by the upper water level detection means;
A lower water level detection means for detecting the water level of the water tank when it is provided below the water tank and supplied from the water tank to the pressure pump;
The predetermined amount of water added by the additional water supply means is set such that the water level rising by the addition coincides with or exceeds one end of the overflow pipe, and the water level determined by the overflow pipe is the stored water level. The flush toilet is characterized in that the pressurizing pump is stopped when the water level is detected by the lower water level detecting means. Water discharge and water stop of the tank water supply source for supplying water to the water storage tank is performed by a diaphragm valve,
The flush toilet according to claim 1, wherein the additional water supply means additionally supplies the self-closing water discharge amount after the diaphragm valve is closed as the predetermined amount of water.   The water supply port of a pump water supply pipe for supplying water from the water storage tank to the pressure pump opens downward at a position below a predetermined amount from the lower water level detection means. Flush toilet.   The water supply port of the pump water supply pipe is provided with a flapper valve that does not regulate the flow of water from the water storage tank to the water supply pipe, but acts as a check valve for regulating the flow of water from the water supply pipe to the water storage tank. The flush toilet according to any one of claims 1 to 3.

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