JP5428462B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet, and more particularly to a flush toilet in which flush water in a water storage tank is sucked by a pressure pump to wash the toilet.

In recent years, in order to reduce the height of toilet bowls, so-called tankless toilets have been used that do not require a water storage tank and directly use tap water supply pressure to supply flush water directly to the toilet bowl. Yes.
However, in such a tankless toilet, in a region where the supply pressure of tap water is low, there is a risk of poor cleaning, so as to solve such a problem, for example, as described in Patent Document 1, A new type of flush toilet has been proposed in which a water storage tank is provided and the wash water in the water storage tank is sucked by a pressure pump and supplied to the toilet.

  The flush toilet of Patent Document 1 is turned on when the water level in the water tank becomes full, and an upper float switch for stopping the water supply to the water tank, and the water in the water tank is a pressurizing pump. And a lower float switch for stopping the pressurizing pump is provided.

JP 2009-2075 A

In the flush toilet described in the above-mentioned conventional patent document 1, in order to improve the design by reducing the capacity of the water storage tank as much as possible, the lower float switch is a pressurizing pump disposed in the water storage tank. It is provided close to a position slightly higher than the water supply port. For this reason, when the wash water in the water storage tank is sucked and supplied to the toilet with the pressurizing pump, the wash water in the water storage tank flows from above toward the water supply port, and the lower float switch is pushed down by the water flow, There may be a problem that the pressurization pump stops due to erroneous detection.
When the pressurization pump stops, it becomes impossible to supply cleaning water to the toilet, so it is necessary to reliably prevent erroneous detection of the lower float switch.

  The present invention has been made to solve the above-described problems of the prior art, and provides a flush toilet that can reliably prevent erroneous detection of the level of flush water in a water storage tank by a lower float switch. The purpose is that.

In order to achieve the above object, a flush toilet of the present invention comprises a toilet body, a water storage tank for storing cleaning water for cleaning the toilet body, and the toilet bowl by sucking water in the water storage tank. Pressurized pump supplied to the main body, pump water passage connecting the water tank and the above-mentioned pressure pump, and ON when the water level of the cleaning water provided above the water tank exceeds the predetermined first water level (L1) An upper float switch, and a support shaft and a float that moves up and down along the support shaft, and is turned on when the water level of the cleaning water falls below a predetermined second water level (L2). a lower float switch to be, and suppresses water flow suppressing means the flow of the washing water flowing downward from above downward float switch occurring water tank during pressurization pump drive, and have a pump water supply path is above It has a water supply port arranged in the water storage tank, the lower float switch is arranged apart from the water supply port of the pump water supply channel, and the water flow control means is formed between the water supply port and the lower float switch, and water is supplied from the lower float switch. The present invention is characterized in that it is a water flow speed lowering means for lowering the speed of the flow flowing toward the mouth than the area above the water storage tank .
In the present invention configured as described above, when the pressurization pump is driven and the wash water in the water storage tank is sucked and supplied to the toilet body, the water flow of the wash water in the water storage tank is caused by the suction force of the pressurization pump. Flows from the upper side to the lower side, but the flow of washing water flowing from the upper side to the lower side toward the lower float switch is suppressed by the water flow suppressing means. As a result, according to the present invention, it is possible to reliably prevent erroneous detection of the water level of the lower float switch caused by the flow of the cleaning water flowing downward from above toward the lower float switch overcoming the buoyancy of the float and pushing down the float. be able to. Furthermore, in the present invention, the water flow speed reducing means causes the flow speed flowing from the lower float switch toward the water supply port to be slower than the area above the water storage tank. As a result, the water flow acting on the lower float overcomes the buoyancy of the float and pushes the float down to prevent erroneous detection of the water level of the lower float switch. it can.

In the present invention, preferably, the water flow speed reducing means is a narrow channel portion formed in a lower portion of the water storage tank between the water supply port of the pump water supply passage and the lower float switch.
In the present invention configured as described above, the narrow channel portion is formed in the lower portion of the water storage tank between the water supply port of the pump water supply channel and the lower float switch, so that the lower float switch is directed toward the water supply port. As a result, the flow speed of the flowing water becomes slow, and the flow of the washing water above the lower float switch becomes an oblique flow toward the water supply port. As a result, the water flow acting on the lower float switch overcomes the buoyancy of the float and floats. It is possible to reliably prevent erroneous detection of the water level of the lower float switch caused by pushing down.

In the present invention, preferably, the water flow speed reducing means is a shielding plate that is disposed so as to extend upward between the water supply port of the pump water supply passage and the lower float switch and to form a narrow flow passage on the side thereof. .
In the present invention configured as described above, a shielding plate that extends upward and forms a narrow flow path on the side between the water supply port of the pump water supply channel and the lower float switch is disposed from the lower float switch. The speed of the flow that flows toward the water supply port is slowed by the narrow flow path of the shielding plate, so that the flow of the washing water above the lower float switch becomes an oblique flow toward the water supply port, and as a result, the flow to the lower float It is possible to reliably prevent erroneous detection of the water level of the lower float switch, which occurs when the acting water flow overcomes the float buoyancy and pushes the float down.

In the present invention, preferably, the lower float switch is positioned above the water supply port of the pump water supply channel, and the bottom surface of the water storage tank is inclined downward from the lower float switch toward the water supply port of the pump water supply channel.
In the present invention configured as described above, the speed of the flow flowing from the lower float switch toward the water supply port is slowed down by the water flow speed reducing means. By inclining downward toward the water, the washing water can be smoothly introduced into the water supply port even if the flow speed is low.

  According to the flush toilet of the present invention, it is possible to reliably prevent erroneous detection of the water level of the wash water in the water storage tank by the lower float switch.

It is a side view which shows the flush toilet bowl by 1st Embodiment of this invention. It is a top view of the flush toilet of FIG. 1 is an overall configuration diagram showing a flush toilet according to a first embodiment of the present invention. It is a time chart which shows the basic operation | movement of the flush toilet by 1st Embodiment of this invention. It is an expanded sectional view which shows the water storage tank of the flush toilet by 1st Embodiment of this invention. It is the top view seen along the VI-VI line of FIG. It is a front view which shows the downward float switch and water flow shielding board of the flush toilet by 2nd Embodiment of this invention. It is a cross-sectional perspective view which shows the water storage tank of the flush toilet by 3rd Embodiment of this invention. It is sectional drawing which follows the IX-IX line of FIG. It is a front view of FIG. It is front sectional drawing which shows the water storage tank of the flush toilet by 4th Embodiment of this invention. FIG. 12 is a plan sectional view of FIG. 11.

Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, the basic structure of a flush toilet according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a flush toilet according to the first embodiment of the present invention, FIG. 2 is a plan view of the flush toilet of FIG. 1, and FIG. 3 is according to the first embodiment of the present invention. FIG. 4 is an overall configuration diagram showing a flush toilet, and FIG. 4 is a time chart showing a basic operation of the flush toilet according to the first embodiment of the present invention.

  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 body 2 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 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 discharge, as will be described later, the wash water stored in the water storage tank 20 built in the function unit 10 is sucked by the pressure pump 22 and discharged from the jet water discharge port 16 at a large flow rate. ing.

Next, the functional unit 10 of the flush toilet 1 according to the present embodiment will be described with reference to FIG. As shown in FIG. 3, the function unit 10 is provided with a water supply path 24 through which wash water is supplied from the water supply. The water supply path 24 includes, as main equipment, a constant flow valve 26 and a diaphragm type electromagnetic opening / closing. A valve 28 and a water supply path switching valve 30 are provided.
A rim side water supply path 32 for supplying cleaning water to the rim water spouting port 18 and a tank side water supply path 34 for supplying cleaning water to the water storage tank 20 are connected to the downstream side of the water supply path switching valve 30. ing.

Here, the wash water that has passed through the constant flow valve 26 passes through the electromagnetic on-off valve 28 and is supplied from the rim water supply path 32 on the rim side to the rim water spouting port 18 or on the tank side by the water supply path switching valve 30. The water is supplied from the tank-side water supply channel 34 to the water storage tank 20.
The opening / closing operation of the electromagnetic opening / closing valve 28 and the switching operation of the water supply passage switching valve 30 are controlled by the controller 36 of the function unit 10.

A pump water supply path 38 is provided between the water storage tank 20 and the pressurizing pump 22, and a water supply port 40 is formed at the upstream end of the pump water supply path 38. Further, a jet water supply path 42 is provided between the pressurizing pump 22 and the jet water outlet 16 to connect them. Here, the pressurizing pump 22 is for sucking the cleaning water stored in the water storage tank 20 and discharging 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 36 provided in the function unit 10.
Further, a jet water spouting flapper valve 44 and a water drain plug 46 which are check valves are provided in a portion of the pump water supply passage 38 located in the water storage tank 20.

  Further, an overflow channel 48 having one end opened and the other end connected to the jet water supply path 42 is provided above the upper float switch 52 described later of the water storage tank 20. A flapper valve 50 as a check valve is attached to the overflow channel 48.

  Next, an upper float switch 52 and a lower float switch 54 are arranged inside the water storage tank 20. The upper float switch 52 is turned on (ON) when the water level in the water storage tank 20 reaches a predetermined upper position L1, and the controller 36 detects this and closes the electromagnetic on-off valve 28. The lower float switch 54 is turned on (ON) when the water level in the water storage tank 20 drops to a predetermined lower water level L2, and the controller 36 detects this and stops the pressurizing pump 22.

  Next, the basic operation of the flush toilet according to the present embodiment will be described with reference to FIG. In this time chart, the rim water discharge operation is omitted. Here, in the present embodiment, the water level when the water is full is the water flow line WFL (see FIG. 3).

  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 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 52, and the upper float switch 52 is turned from ON to OFF.

  Next, when the lower float switch 54 is turned from OFF to ON at the time indicated by t3, the pressurizing pump 22 is stopped and the jet water spouting is finished. The flow rate of the pressurizing pump 22 is as large as 70 L / min. Therefore, it is difficult to keep the amount of water supplied to the toilet bowl constant by time control, and the pressurization pump 22 is stopped by detection by the lower float switch 54. Here, the water level in the water storage tank 20 becomes a water deadline WDL which is a position below the lower float switch 54 due to the operation inertia amount of the pressurizing pump 22.

  Thereafter, at the time indicated by t4, the electromagnetic on-off valve 28 is operated (OFF → ON), and water supply to the water storage tank 20 is started. At this time, the water level in the water storage tank 20 is the water deadline WDL. Then, the lower float switch 54 is turned from ON to OFF at the time t5 after the electromagnetic opening / closing valve 28 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 52, the upper float switch 52 is turned on and the electromagnetic on-off valve 28 is stopped. Thereafter, at time t7, the water level becomes the full water flow line WFL, and a series of cleaning operations is completed.

Next, the internal structure of the water storage tank 20 of this embodiment is demonstrated with FIG.5 and FIG.6. FIG. 5 is an enlarged cross-sectional view showing the water storage tank of the flush toilet according to the first embodiment of the present invention, and FIG. 6 is a plan view taken along line VI-VI of FIG.
First, as shown in FIG. 6, the upstream side of the pump water supply path 38 extends into the water storage tank 20. The water supply port 40, the jet water discharge flapper valve 44, and the water drain plug 46 of the pump water supply path 38 It is arranged at a height near the lower end of the tank 20, that is, at a position below the lower float switch 54.

  Next, the structure of the lower float switch 54 will be described. The lower float switch 54 includes a base portion 54a attached to the bottom surface of the water storage tank 20, a support shaft 54b extending upward from the base portion 54a, and vertically moved along the support shaft 54b by buoyancy and inserted into the support shaft 54b. A float 54c, a stopper 54d attached to the upper end of the support shaft 54b, a magnet 54e embedded in the inner peripheral surface of the float 54c, and a reed switch 54f embedded in the support shaft 54b.

  In the state where the water storage tank 20 is filled with cleaning water, the lower float switch 54 has the upper end of the float 54c at the position H1 (the highest level), and drives the pressurizing pump to wash the water in the water storage tank 20. Is supplied to the toilet body 2 and the water level is lowered, the upper end of the float 54c is lowered to the position H2 (lowest position) shown in FIG. 5, and the magnet 54e turns on the reed switch 54f. The driving of the pressurizing pump 22 is stopped, and the supply of the washing water to the toilet body 1 is stopped.

  Next, as shown in FIGS. 5 and 6, in the vicinity of and directly above the lower float switch 54, there is a water flow shielding plate that is a flat plate member on the outer periphery of the pump water supply passage 38 located in the water storage tank 20. 56 is mounted in a substantially horizontal state. The water flow shielding plate 56 is attached to the pump water supply passage 38, but may be attached to the inner wall of the water storage tank 20 in addition to this.

Next, the operation (operation) according to the first embodiment of the present invention will be described. Since the basic operation of the flush toilet according to this embodiment is as described above, here, the operation when the pressurizing pump is driven to supply the flush water in the water storage tank to the toilet body will be described.
First, when the flushing water in the water storage tank 20 is sucked by the pressurizing pump 22 and water supply to the jet water outlet 16 of the toilet body 1 is started, the water supply port 40 above the water supply port 40 of the pump water supply path 38 is started. Although the wash water is strongly drawn into the water area and the water level is lowered, a water flow shielding plate 56 is provided immediately above the vicinity of the lower float switch 54, so that the water flow directly acts on the lower float switch 54. Therefore, it is difficult to form a flow that overcomes the buoyancy of the float 54c. That is, the water flow shielding plate 56 suppresses (reduces) the flow of cleaning water that flows downward from above toward the lower float switch 54. As a result, according to the present embodiment, the erroneous detection of the water level of the lower float switch 54 caused by the flow of the cleaning water flowing downward from above toward the lower float switch 54 overcomes the buoyancy of the float 54c and pushes down the float 54c. Can be reliably prevented.

Next, a flush toilet according to a second embodiment of the present invention will be described with reference to FIG. FIG. 7 is a front view showing a lower float switch and a water flow shielding plate of the flush toilet according to the second embodiment of the present invention. Note that in the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and descriptions thereof are omitted.
As shown in FIG. 7, in the flush toilet according to the second embodiment, instead of the water flow shielding plate 56 attached to the pump water supply path 38 in the first embodiment, a water flow shielding plate 58 that is a plate-like member, The lower float switch 54 is attached to the upper end of the support shaft 54b in a substantially horizontal direction.

  According to the second embodiment, since the water flow shielding plate 58 is attached to the upper end of the support shaft 54b of the lower float switch 54, it also serves as a stopper for the float 54c. Moreover, since the water flow shielding plate 58 is attached to the lower float switch 54, the attachment to the water storage tank 20 is facilitated.

  Furthermore, also in the second embodiment, when the pressurized pump 22 sucks the full flush water in the water storage tank 20 and starts water supply to the jet water outlet 16 of the toilet body 1, the pump water supply path 38. In the water area above the water supply port 40, the wash water is strongly drawn and the water level is lowered. However, since the water flow shielding plate 58 is attached to the upper end of the support shaft 54b of the lower float switch 54 in a substantially horizontal direction, It does not act directly on the lower float switch 54, and therefore it is difficult to form a flow that overcomes the buoyancy of the float 54c. That is, the water flow shielding plate 58 suppresses (reduces) the flow of cleaning water that flows downward from above toward the lower float switch 54. As a result, according to the present embodiment, the erroneous detection of the water level of the lower float switch 54 caused by the flow of the cleaning water flowing downward from above toward the lower float switch 54 overcomes the buoyancy of the float 54c and pushes down the float 54c. Can be reliably prevented.

  Next, a third embodiment of the present invention will be described with reference to FIGS. 8 is a sectional perspective view showing a water storage tank of a flush toilet according to a third embodiment of the present invention, FIG. 9 is a sectional view taken along line IX-IX in FIG. 8, and FIG. 10 is a front view of FIG. It is. In the third embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIGS. 8 to 10, the water storage tank 20 includes a front wall 20a, a rear wall 20b, a side wall 20c, and a bottom wall 20d. A rectangular parallelepiped protrusion 60 is formed on the lower side of the center of the rear wall 20b in the longitudinal direction so that the planar cross-sectional shape of the water storage tank 20 is a U-shape (concave shape). In view, a narrow channel portion (water flow speed reducing means) 62 is formed so that the channel width W2 is narrower than the width W1 of both sides. Further, the lower float switch 54 is disposed away from the water supply port 40 of the pump water supply path 38, and a narrow channel portion (water flow speed reducing means) is provided between the lower float switch 54 and the water supply port 40 of the pump water supply path 38. 62 is formed. Further, the bottom wall 20 d of the water storage tank 20 is inclined downward from the lower float switch 54 toward the water supply port 40 of the pump water supply path 38.

  Even in the flush toilet according to the third embodiment, when the flush water in the water storage tank 20 is sucked by the pressurizing pump 22 and water supply to the jet water outlet 16 of the toilet body 1 is started, first, As shown by arrow A1, the water flow away from the water supply port 40 flows in a diagonally downward direction, and then the wash water is strongly drawn from above the water supply port 40 of the pump water supply channel 38 to lower the water level. As shown by the arrow A2, the water flow in the vicinity of the lower flow switch 54 flows in an oblique direction toward the water supply port 40, and the velocity is slower in the narrow channel portion 62 than in the region above the water storage tank 20. .

  Thus, in the flush toilet of the present embodiment, the flow path narrow portion 62 is formed in the lower part of the water storage tank 20 between the water supply port 40 of the pump water supply path 38 and the lower float switch 54. The speed of the flow flowing from the float switch 54 toward the water supply port 40 is slower than the area above the water storage tank 20, and thereby the flow of the wash water above the lower float switch 54 is obliquely directed toward the water supply port 40. As a result, it is possible to reliably prevent erroneous detection of the water level of the lower float switch 54 caused by the water flow acting on the lower float switch 54 overcoming the buoyancy of the float 54c and pushing down the float 54c.

  Furthermore, in the present embodiment, the narrow channel 62 reduces the speed of the flow flowing from the lower float switch 54 toward the water supply port 40, but the bottom wall 20 d of the water storage tank 20 is pumped from the lower float switch 54 to the pump water supply. By inclining downward toward the water supply port 40 of the path 38, the washing water can be smoothly flowed into the water supply port 40 even when the flow speed is low. Further, since the bottom wall surface 20d is inclined and the washing water can smoothly flow into the water supply port 40, the water level in the water storage tank 20 can be lowered uniformly, and the problem of air biting of the pressure pump 22 can be eliminated. . When the bottom wall surface 20d is flat, the water on the water supply port 40 side tends to supply water more easily than the lower float switch 54 side, and the water level on the water supply port 40 side tends to decrease. This is because, in a state where the power is not turned ON, water near the water supply port 40 is reduced, and a problem of air biting that the pressure pump 22 sucks air occurs.

  Next, a fourth embodiment of the present invention will be described with reference to FIGS. 11 and 12. FIG. 11 is a front sectional view showing a water storage tank of a flush toilet according to a fourth embodiment of the present invention, and FIG. 12 is a plan sectional view of FIG. Note that in the fourth embodiment, identical symbols are assigned to components identical to those in the third embodiment and descriptions thereof are omitted.

  As shown in FIGS. 11 and 12, also in the fourth embodiment, the water storage tank 20 includes a front wall 20a, a rear wall 20b, a side wall 20c, and a bottom wall 20d, as in the third embodiment. Further, the lower float switch 54 is disposed away from the water supply port 40 of the pump water supply path 38, and further, the bottom wall 20 d of the water storage tank 20 is directed downward from the lower float switch 54 toward the water supply port 40 of the pump water supply path 38. It is tilted. Further, a shielding plate (water flow speed lowering means) 64 extending upward is provided at the center in the longitudinal direction of the bottom wall 20 d of the water storage tank 20. Between the front wall 20a and the rear wall 20b which are the sides of the shielding plate 64, a flow path 66 having a narrow width W3 is formed.

  Even in the flush toilet according to the fourth embodiment, when the flush water in the water storage tank 20 is sucked by the pressure pump 22 and water supply to the jet spout 16 of the toilet body 1 is started, first, As shown by the arrow B1, the water flow away from the water supply port 40 flows in an obliquely downward direction, and then the wash water is strongly drawn from above the water supply port 40 of the pump water supply channel 38, thereby lowering the water level. The water flow in the vicinity of the lower flow switch 54 flows in an oblique direction toward the water supply port 40 as indicated by an arrow B2, and the speed is reduced in the flow channel 66 formed by the shielding plate 64.

  Thus, in the flush toilet of this embodiment, the narrow flow path 66 is formed by providing the shielding plate 64 extending upward on the bottom wall 20d between the water supply port 40 of the pump water supply path 38 and the lower float switch 54. Therefore, the speed of the flow that flows from the lower float switch 54 toward the water supply port 40 in the narrow flow path 66 becomes slow, and thereby, the flow of the washing water above the lower float switch 54 is inclined toward the water supply port 40. As a result, the water flow acting on the lower float switch 54 overcomes the buoyancy of the float 54c and depresses the float 54c, so that erroneous detection of the water level of the lower float switch 54 can be reliably prevented.

  Furthermore, also in the fourth embodiment, the speed of the flow flowing from the lower float switch 54 toward the water supply port 40 is reduced by the shielding plate 64, but the bottom wall 20 d of the water storage tank 20 is connected to the pump water supply path from the lower float switch 54. By inclining downward toward the 38 water supply ports 40, the washing water can smoothly flow into the water supply ports 40 even when the flow rate is low.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet seat body 20 Reservoir tank 22 Pressurization pump 36 Controller 38 Pump water supply path 40 Water supply port 42 Jet water supply path 52 Upper float switch 54 Lower float switch 54b Support shaft 54c Float 56, 58 Water flow shielding plate 60 Protruding part 62 Channel narrow portion 64 Shield plate 66 Channel

Claims (4)

The toilet body,
A water storage tank for storing cleaning water for cleaning the toilet body,
A pressurizing pump that sucks the water in the water storage tank and supplies it to the toilet body;
A pump water supply channel connecting the water storage tank and the pressure pump;
An upper float switch that is provided above the water storage tank and is ON when the water level of the wash water exceeds a predetermined first water level (L1);
A lower float switch that is provided below the water storage tank, includes a support shaft and a float that moves up and down along the support shaft, and is turned on when the water level of the cleaning water falls below a predetermined second water level (L2); ,
Possess the inhibiting water flow suppressing means the flow of the washing water flowing downward from above downward float switch occurring to the reservoir tank when the pressure pump drive, a
The pump water supply path includes a water supply port arranged in the water storage tank, and the lower float switch is arranged apart from the water supply port of the pump water supply channel,
The water flow suppression means is formed between the water supply port and the lower float switch, and is a water flow speed reduction means for lowering the speed of the flow flowing from the lower float switch toward the water supply port than the area above the water storage tank. Featuring a flush toilet. The flush toilet according to claim 1 , wherein the water flow speed reducing means is a narrow channel portion formed in a lower portion of the water storage tank between a water supply port of the pump water supply passage and the lower float switch. The water flow rate lowering means is in claim 1 which is arranged the shielding plate so as to form a narrow flow path and the side extending upwardly between the water inlet and the lower float switch of the pump water supply channel The flush toilet described. The lower float switch is located above the water inlet of the pump water supply channel, the bottom of the water storage tank of claims 1 to 3 is inclined downwardly toward the water inlet of the pump water supply channel from the lower float switch The flush toilet according to any one of the above.

Images