JP2018003250A - Flush toilet bowl - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flush toilet bowl that suppresses generation of a strange noise when flushing water is discharged from a jet water discharge port.SOLUTION: A flush toilet bowl (1) of the present invention includes a flush toilet bowl body (2). The flush toilet bowl body has a bowl part (20), drain trap pipeline (22), and a jet water channel (31) formed thereon, the bowl part having a bowl-form sewage receiving surface, the drain trap pipeline including an ascending pipeline (22b), a bent part (22c) and a descending pipeline (22d), and the jet water channel extending from a water channel inflow part (31a) for letting flushing water flow into the flush toilet bowl body to a jet water discharge port (32) formed at a bottom portion of the bowl part, for leading the flushing water toward the jet water discharge port. The jet water discharge port is disposed to face an inlet opening (22a) of the drain trap pipeline, and an opening area of the jet water discharge port is smaller than a flow channel cross-sectional area at a base edge part of the jet water channel. A portion of the jet water channel on a downstream side of the water channel inflow part is disposed below a reserved water level (L) defined by the bent part.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet that discharges washing water from a jet outlet and discharges filth.

  Japanese Unexamined Patent Publication No. 2014-62431 (Patent Document 1) describes a flush toilet. In this flush toilet, an enlarged portion is provided in the middle of the water conduit that guides the washing water to the jet outlet, thereby suppressing the generation of abnormal noise when the washing water is discharged from the jet outlet. That is, if a large amount of air stays in the water conduit that guides wash water to the jet outlet, when the water is discharged from the jet outlet, the retained air is compressed and compressed in the water conduit. When air is discharged from the jet outlet, a plosive sound called “bokon” is generated as an abnormal sound. In the flush toilet described in Japanese Patent Application Laid-Open No. 2014-62431, the enlarged air is provided in the middle of the water conduit to finely disperse the staying air, subdivide the air mass, and discharge from the jet outlet Alleviates the problem of abnormal noise generation.

JP 2014-62431 A

  The generation of abnormal noise accompanying water discharge from the jet outlet is particularly problematic when the opening area of the jet outlet is reduced in order to save water. That is, in order to discharge the filth in the bowl with a small amount of washing water, it is necessary to increase the flow rate of the washing water flowing out from the jet outlet, and to quickly fill the drain trap pipe to cause siphon action. . If the opening area of the jet outlet is made small in order to increase the flow rate of the wash water that flows out, the retained air is strongly compressed in the water conduit, and a large burst sound is generated when it flows out.

  A flush toilet equipped with a pressurizing pump for pressurizing washing water is also known. In such flush toilets, the washing water for discharging from the jet outlet is pressurized by a pressure pump and flows into the water conduit, and the flow rate of the washing water flowing out from the jet outlet is increased. Even in a flush toilet equipped with such a pressure pump, the staying air is easily compressed in the water conduit, and the generation of abnormal noise during jet discharge becomes a problem.

  In the flush toilet described in Japanese Patent Application Laid-Open No. 2014-62431 described above, the noise generated is reduced by providing the enlarged portion in the middle of the conduit, but the structure of the conduit by providing the enlarged portion. There is a problem that becomes complicated. Moreover, if an enlarged portion is provided in the middle of the water conduit and the air staying there is dispersed, the flow resistance of the entire water conduit increases and energy loss occurs. Therefore, the cleaning water discharged from the jet outlet The flow rate will decrease. For this reason, if an enlarged portion is provided in the middle of the water conduit, it will be a negative factor in saving water in the flush toilet.

  Accordingly, the present invention is a flush toilet that can suppress the generation of abnormal noise when discharging wash water from the jet outlet without complicating the structure of the water conduit or preventing water saving of the flush toilet. The purpose is to provide.

  In order to solve the above-mentioned problems, the present invention is a flush toilet that discharges washing water from a jet outlet and discharges filth, and has a flush toilet body made of ceramics, and this flush toilet body Are provided at the downstream end of the bowl portion having a bowl-shaped filth receiving surface, a rising pipe extending obliquely upward from the bottom of the bowl section, and having a high water level in the bowl section. Provided at the bottom of the bowl part from the drain trap pipe with a bent part that regulates the length and a descending pipe line that extends downward from the bent part, and from the water conduit inflow part that allows washing water to flow into the flush toilet body And a jet conduit that leads the flush water to the jet outlet, and the jet outlet is disposed so as to face the inlet opening of the drain trap pipe. The opening area of the water mouth is zette It is formed narrower than the channel cross-sectional area of the base end portion of the water channel, and the jet conduit has a portion downstream of the water conduit inflow portion disposed below the water storage surface defined by the bent portion. It is characterized by that.

  In the present invention configured as described above, at the time of toilet flushing, the flush water flows into the pottery flush toilet main body through the conduit inflow section of the jet conduit. The washing water that has flowed into the water conduit inflow portion flows through the Zet water conduit and is discharged from a jet outlet provided at the bottom of the bowl portion. The wash water discharged from the jet discharge port flows into the inlet opening of the drain trap pipe disposed so as to face the jet discharge port while entraining the accumulated water and dirt in the bowl portion. The accumulated water and dirt flowing in from the inlet opening are discharged from the flush toilet through the ascending pipeline, the bent portion, and the descending pipeline of the drain trap pipeline.

  According to the present invention configured as described above, the jet outlet is disposed so as to face the inlet opening of the drain trap pipe, and the opening area of the jet outlet is a flow path at the base end portion of the jet conduit. Since it is formed to be narrower than the cross-sectional area, the washing water flowing out from the jet outlet is accelerated and flows into the inlet opening of the drain trap pipe vigorously. Thereby, the filth in a bowl part can be discharged | emitted efficiently and the quantity of the washing water required for washing | cleaning can be decreased. In addition, since the portion of the jet conduit downstream of the conduit inlet is located below the water reservoir surface of the bowl portion, the amount of air remaining in the jet conduit is small, Abnormal noise when accelerating the cleaning water and discharging it from the jet outlet can be greatly suppressed. That is, if the cleaning water discharged from the jet outlet is accelerated by forming the opening area of the jet outlet narrower than the channel cross-sectional area of the base end portion of the jet conduit, it remains in the jet conduit. When the air is compressed and discharged from the jet outlet, it is easy to generate an abnormal noise of a plosive sound. According to the present invention, since the amount of air remaining in the jet conduit is small, it is possible to greatly reduce abnormal noise when air is discharged from the jet outlet. Thereby, generation | occurrence | production of the noise at the time of discharging washing water from a jet outlet can be suppressed, without complicating the structure of a jet conduit and preventing water saving of a flush toilet.

In the present invention, preferably, the jet conduit is formed so that its cross-sectional area decreases toward the downstream side.
According to the present invention configured as described above, since the cross-sectional area of the Zet conduit is formed so as to decrease toward the downstream side, the cleaning water flowing through the Zet conduit can be reduced with less energy loss. It can accelerate and the flow rate of the wash water discharged from the jet outlet can be made higher. As a result, it is possible to discharge the accumulated water and filth in the bowl portion with less washing water while suppressing the generation of noise due to the acceleration of the washing water.

In this invention, Preferably, it has a pressurization pump, and this pressurization pump pressurizes and flows in the wash water to the water conduit inflow part of the flush toilet main body.
According to the present invention configured as described above, since the washing water is pressurized and introduced into the water conduit inflow portion by the pressurizing pump, the flow rate of the washing water flowing in the jet conduit can be increased, and the washing is performed. While suppressing the generation of abnormal noise due to the acceleration of water, it is possible to discharge the accumulated water and dirt in the bowl portion in a shorter time.

In the present invention, it is preferable that at least a part of the ceiling surface of the jet conduit is constituted by a wall surface forming the bottom of the bowl portion.
According to the present invention configured as described above, since at least a part of the ceiling surface of the Zet conduit is formed by the wall surface of the bottom portion of the bowl portion, the structure is simpler than the conduit inlet portion of the Zette conduit. Further, the flush toilet body can be formed such that the downstream portion is disposed below the water storage surface.

  According to the flush toilet of the present invention, it is possible to suppress the generation of abnormal noise when discharging wash water from the jet outlet without complicating the structure of the water conduit or preventing water saving of the flush toilet. it can.

It is a perspective view showing the whole flush toilet according to an embodiment of the present invention. It is a top view which shows the flush toilet body part of the flush toilet according to embodiment of this invention. It is the whole sectional view of the direction of order of the flush toilet bowl by the embodiment of the present invention. It is the whole sectional view which follows the IV-IV line in Drawing 2 of the flush toilet bowl by the embodiment of the present invention. It is a perspective view which shows the structure of the zette water conduit in the flush toilet by embodiment of this invention. It is the figure which showed the flow-path cross-sectional shape of each part of Zet water conduit about the cross section in the AA thru | or EE line of FIG. It is a graph which shows transition of the channel cross-sectional area of each part of Zetto waterway.

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 perspective view showing an entire flush toilet according to an embodiment of the present invention, and shows a state in which a toilet lid and a toilet seat are rotated to an upper position. FIG. 2 is a plan view showing a flush toilet body portion of the flush toilet of the present embodiment shown in FIG. FIG. 3 is a full sectional view in the front-rear direction of the flush toilet of this embodiment, showing a state in which the toilet lid and toilet seat are removed. FIG. 4 is a full sectional view of the flush toilet of the present embodiment, taken along line IV-IV in FIG.

  As shown in FIG. 1, a flush toilet 1 according to an embodiment of the present invention includes a ceramic flush toilet main body 2 and a toilet seat 4 disposed on the upper surface of the flush toilet main body 2 so as to be pivotable in the vertical direction. And a toilet lid 6 disposed so as to be rotatable in the vertical direction so as to cover the toilet seat 4, and a functional unit 8 disposed behind the flush toilet main body 2. Moreover, the function part 8 includes a sanitary washing device (not shown) for washing the user's local part and a water supply system function part 12 (FIGS. 2 and 3) related to the water supply function to the flush toilet body 2. Built in.

Further, the flush toilet body 2 has a bowl portion 20 formed so as to rise from a bowl-shaped filth receiving surface 14 and a shelf surface 16 at the upper edge of the filth receiving surface 14. The rim portion 18 is provided.
Further, as shown in FIG. 3, the flush toilet body 2 is formed with a drain trap conduit 22 extending from an inlet opening 22 a provided at the bottom of the bowl portion 20. The drain trap pipe 22 is provided at the downstream end of the ascending pipe 22b and the ascending pipe 22b extending obliquely upward and rearward from the inlet opening 22a, and is a bend that regulates the height of the water storage surface L of the bowl portion 20. It is comprised from the part 22c and the descending pipe line 22d extended toward the downward direction from this bending part 22c. That is, the height of the water storage surface L of the bowl portion 20 is defined by the bent portion 22c where the bottom surface of the drain trap pipe 22 is at the highest position.

Further, as shown in FIG. 2, a rim water passage 24 is formed inside the rim portion 18 on the side surface of the flush toilet main body 2. A rim water discharge port 26 which is a part of the rim water discharge portion is formed at the downstream end of the rim water passage 24. Further, the upstream side of the rim water passage 24 is connected to a water conduit 28 that is a water conduit that supplies cleaning water supplied from a water supply (not shown) as a cleaning water source to the rim water passage 24. The upstream side of the water conduit 28 is directly connected to a water supply (not shown) as a cleaning water source, and the cleaning water is guided to the rim spout 26 using the water supply pressure of the water supply. The washing water supplied from the water conduit 28 into the rim water passage 24 is guided to the front side of the flush toilet main body 2 in the rim water passage 24, and then turned back to the rear from the rim water outlet 26. Are discharged (rim watering).
The cleaning water discharged from the rim water spouting port 26 is guided to the shelf surface 16 through a water passage 30 formed so as to be continuous with the rim water discharging port 26, and the filth receiving surface 14 is washed by turning inside the bowl portion 20. It is supposed to be.

  Furthermore, as shown in FIG. 2, a jet spout 32 is formed at the bottom of the bowl portion 20, and the jet spout 32 discharges a jet jet toward the inlet opening 22 a of the drain trap conduit 22. As shown in the figure, it is arranged so as to face the inlet opening 22a. Further, in the flush toilet main body 2, a jet conduit that extends from a water conduit inflow portion 31 a (FIG. 5) through which flush water flows into the flush toilet main body 2 to a jet outlet 32 provided at the bottom of the bowl portion 20. 31 is formed.

  Further, as shown in FIG. 2, a water storage tank 34 and a pressure pump 36 are provided as a water supply system function unit 12 at the rear part of the flush toilet body 2. The pressurizing pump 36 is configured to pressurize the cleaning water stored in the water storage tank 34 and to flow into the water conduit inflow portion 31a. Thereby, when the pressurizing pump 36 is operated, the wash water stored in the water storage tank 34 is pressurized by the pressurizing pump 36 and flows into the water conduit inflow portion 31 a, and passes through the jet conduit 31. It is discharged from the jet spout 32.

  Further, the wash water discharged from the jet water discharge port 32 enters the inlet opening 22a of the drain trap pipe 22 provided facing the jet water discharge port 32 while entraining the stored water stored in the bowl portion 20. Inflow. The washing water that has flowed into the inlet opening 22a rises in the ascending pipeline 22b and fills up the bent portion 22c to induce siphon action. When the siphon action occurs, the accumulated water and dirt in the bowl portion 20 are sucked into the ascending pipeline 22b through the inlet opening 22a, and are discharged from the descending conduit 22d through the bent portion 22c. In this way, by using the pressurizing pump 36 to inject the cleaning water from the jet outlet 32, the inside of the drain trap pipe 22 can be filled with water at an early stage, and the siphon action is activated at an early stage. be able to.

  In the present embodiment, the wash water in the water storage tank 34 is caused to flow into the jet conduit 31 using the pressurizing pump 36. The present invention can also be applied to a tank type flush toilet that allows flush water to flow in by a pressure type or a head pressure of a water storage tank.

Next, with reference to FIG. 2 thru | or FIG. 7, the structure of the jet conduit 31 formed in the flush toilet body 2 is demonstrated in detail.
FIG. 5 is a perspective view showing the configuration of the zette water conduit in the flush toilet main body, in which the side wall surface surrounding the periphery of the bowl portion 20 is removed. FIG. 6 is a view showing the cross-sectional shape of each part of the Zet conduit 31 with respect to the cross section taken along the lines AA to EE in FIG. 2. FIG. 7 is a graph showing the transition of the channel cross-sectional area of each part of the Zet conduit 31.

  As shown in FIG. 2, after the zette waterway 31 extends from the waterway inflow part 31 a provided at the rear part of the flush toilet body 2 made of ceramics toward the front obliquely downward of the flush toilet body 2, This is a passage that makes a U-turn and extends to the jet outlet 32 that opens toward the rear of the flush toilet body 2. Specifically, the Zet conduit 31 includes a conduit inflow portion 31a through which washing water flows, a conduit intermediate portion 31b extending obliquely downward and forward from the conduit inflow portion 31a, and a tip of the intermediate portion 31b. It is comprised from the water conduit curved part 31c which makes a U-turn and goes to the back side.

  Further, as shown in FIG. 3, a water supply pipe 36a extending from the pressurizing pump 36 is connected to the water conduit inflow portion 31a in a watertight manner. The water conduit inflow portion 31a forms a box-shaped space, and an inflow opening for connecting the water supply pipe 36a is formed in the ceiling surface. That is, the wash water supplied through the water supply pipe 36a flows into the space in the water conduit inflow portion 31a from the ceiling surface. The ceiling surface of the water conduit inflow portion 31 a is at a position higher than the height of the water storage surface L defined by the bent portion 22 c of the drain trap pipe 22. For this reason, in the standby state of the flush toilet 1 where the water surface L of the bowl portion 20 is at a height defined by the bent portion 22c, the connecting portion between the water supply pipe 36a and the water conduit inflow portion 31a is above the water surface. Since it is not submerged, the risk of water leakage from the connection can be minimized. The water supply pipe 36a is provided with an air vent (not shown) for discharging the air remaining in the water supply pipe 36a or the like during jet discharge.

  Moreover, the water conduit middle part 31b is a flow path that is provided so as to communicate with the side surface of the water conduit inflow part 31a and extends obliquely downward and forward from the water conduit inflow part 31a (FIG. 5). Here, the entire ceiling surface of the channel of the water guide middle portion 31b is located below the height of the water storage surface L of the bowl portion 20 (FIG. 3). For this reason, in the state where the stored water is stored up to the stored water surface L in the bowl portion 20, the inside of the water guide intermediate portion 31b is full and no air remains. In other words, the water conduit inflow portion 31a forms a passage extending upward from the reservoir surface L, while the water conduit middle portion 31b is submerged extending obliquely downward in the lateral direction from the downstream end of the water conduit inflow portion 31a. Form a passage.

  The water conduit curved portion 31c is a generally U-shaped flow channel connected to the downstream side of the water conduit intermediate portion 31b, and a jet spout 32 is formed at the downstream end thereof (FIG. 2). As a result, the wash water that has flowed forward and obliquely downward in the water conduit middle portion 31b is turned 180 ° in the water conduit curved portion 31c and discharged from the jet outlet 32 toward the rear. Further, the water conduit curved portion 31c is connected to the downstream end at the lowest position of the water conduit middle portion 31b and extends in a generally horizontal plane. For this reason, the whole ceiling surface of the flow path of the water conduit curved portion 31c is located below the height of the water storage surface L, and the water is stored in the bowl portion 20 up to the water storage surface L. In FIG. 3, the inside of the water conduit curved portion 31c is also full and no air remains. For this reason, in the jet conduit 31, air remains only in a very small space near the ceiling surface of the conduit inlet 31 a.

Next, as shown in FIG. 2, the waterway middle part 31 b of the zette waterway 31 extends from the waterway inflow part 31 a in the front-rear direction of the flush toilet main body 2, and then left and right of the flush toilet main body 2. It bends toward the center of the direction and extends again in the front-rear direction.
On the other hand, FIG. 4 is a sectional view taken along line IV-IV in FIG. As shown in FIG. 4, the lower part of the bowl part 20 is comprised from the side wall surface 14a with a steep inclination, and the bottom wall surface 14b with a gentle inclination connected to the lower side of this side wall surface 14a. Further, the water guide middle portion 31 b formed integrally with the flush toilet body 2 has a ceiling surface formed by a bottom wall surface 14 b that forms the bottom of the bowl portion 20. As described above, at least a part of the zette water conduit 31 is disposed below the bottom wall surface 14b of the bowl portion 20, and the ceiling surface of the zette water conduit 31 is a wall surface constituting the bottom wall surface 14b of the bowl portion 20 Formed by. Thereby, it becomes possible to arrange | position the downstream part rather than the water conduit inflow part 31a of the Zet water conduit 31 below the water storage surface.

Next, FIG. 6 is a diagram showing the cross-sectional shape of each part of the Zet conduit 31 along the lines AA to EE in FIG. 2, and FIG. It is the graph which showed the cross-sectional area. The AA cross section in FIG. 6 shows the flow path cross section of the water conduit inflow part 31a, the BB cross section shows the flow path cross section of the upstream end of the water conduit middle part 31b, and the EE cross section shows the water conduit curved part 31c. The cross section (jet outlet 32) of the downstream end of is shown. As is clear from FIG. 6, the Zet conduit 31 has a downstream end (the EE cross section (the Zet spout 32) has an opening area narrower than the flow path cross-sectional area of the base end (A-A cross section). is formed. Further, as shown in FIGS. 6 and 7, jet water conduit 31, a-a cross-section (2223mm ^2), B-B cross section (702mm ^2), C-C cross section (400 mm ^2), Like the DD cross section (420 mm ² ) and the EE cross section (140 mm ² ), the flow passage cross-sectional area is formed so as to decrease almost monotonously toward the downstream side. By forming the jet conduit 31 so that the cross-sectional area gradually decreases toward the downstream side, the wash water pressurized by the pressurizing pump 36 and flowing into the jet conduit 31 does not involve a large energy loss. Increase the flow velocity in the water channel and discharge the jet. 32 is discharged from.

Next, the operation (action) of the flush toilet 1 according to the embodiment of the present invention will be described.
First, after a user uses a toilet, after pressing a large washing operation button (not shown) provided on a remote control (not shown), a signal from the remote control (not shown) 12 is transmitted to a controller (not shown) incorporated in the washing machine 1 and the washing operation for the large washing of the flush toilet 1 is started. A controller (not shown) sends a signal to an electromagnetic valve (not shown) built in the water supply system function unit 12 to open it. As a result, the wash water passes through the water conduit 28 and the rim water passage 24 from the water supply, and is discharged from the rim spout 26. The wash water discharged from the rim spout 26 flows down while turning in the bowl portion 20, and the inner wall surface of the bowl portion 20 is washed.

Next, a controller (not shown) starts jet water discharge (jet water discharge).
First, a controller (not shown) sends a signal to the pressurizing pump 36 to activate it. The washing water stored in the water storage tank 34 is sucked up by the pressurizing pump 36 and pressurized. The washing water pressurized by the pressurizing pump 36 flows into the water conduit inflow portion 31 a, gradually flows down in the jet water conduit 31 while increasing the flow velocity, and from the jet water outlet 32 opened at the bottom of the bowl portion 20, It is discharged toward the rear side of the flush toilet main body 2. Here, in the standby state of the flush toilet 1 (before the user presses the operation button), the inside of the jet conduit 31 is filled with water downstream from the conduit inlet portion 31a. A small amount of air remains in the air. For this reason, there is very little air compressed inside the jet conduit 31 during jet discharge, and the abnormal noise when the compressed air is discharged from the jet outlet 32 is greatly reduced.

  The cleaning water discharged from the jet water discharge port 32 flows into the inlet opening 22a of the drain trap pipe 22 disposed so as to face the jet water discharge port 32 while entraining the accumulated water in the bowl portion 20. The washing water that has flowed up rises in the ascending pipeline 22b of the drain trap pipeline 22 and fills the bent portion 22c. When the bent portion 22c is filled with water, a siphon action occurs, and the accumulated water and dirt in the bowl portion 20 are sucked from the inlet opening 22a of the drain trap pipe 22 and discharged through the descending pipe 22d. In the flush toilet 1 of the present embodiment, the flow passage cross-sectional area of the Zet conduit 31 is formed so as to decrease toward the downstream side, so the wash water flowing through the Zett conduit 31 is accelerated and high. It is discharged from the jet outlet 32 at a flow rate. Thereby, the wash water discharged from the jet discharge port 32 rapidly fills the drain trap pipe 22 and the siphon action is activated at an early stage. Since the siphon action is activated at an early stage, it becomes possible to drain the water and filth in the bowl portion 20 in a short time, so that the toilet cleaning time can be shortened and used for cleaning. The amount of washing water can be reduced.

  According to the flush toilet 1 of the embodiment of the present invention, the jet outlet 32 is disposed so as to face the inlet opening 22a of the drain trap conduit 22 (FIG. 3), and the opening area of the jet outlet 32 is Since it is formed narrower than the channel cross-sectional area of the base end portion of the jet conduit 31 (FIG. 6), the wash water flowing out from the jet outlet 32 is accelerated and vigorously moves toward the inlet opening of the drain trap conduit 22. Inflow. Thereby, the waste in the bowl part 20 can be discharged | emitted efficiently, and the quantity of the washing water required for washing | cleaning can be decreased. In addition, since the portion of the jet conduit 31 on the downstream side of the conduit conduit inflow portion 31a is disposed below the reservoir surface L of the bowl portion 20, the air remaining in the jet conduit 31 Therefore, it is possible to greatly suppress abnormal noise when the cleaning water is accelerated and discharged from the jet water outlet 32. That is, when the cleaning water discharged from the jet outlet 32 is accelerated by forming the opening area of the jet outlet 32 narrower than the channel cross-sectional area of the base end portion of the jet conduit (FIG. 6), When the air remaining in the water channel 31 is compressed and discharged from the jet discharge port 32, it is easy to generate a plosive noise. According to this embodiment, since the amount of air remaining in the jet conduit 31 is small, it is possible to significantly reduce abnormal noise when air is discharged from the jet outlet 32. Thereby, generation | occurrence | production of the noise at the time of discharging washing water from the jet outlet 32 can be suppressed, without complicating the structure of the zette water conduit 31 or preventing water saving of the flush toilet 1.

  Moreover, according to the flush toilet 1 of this embodiment, since the flow-path cross-sectional area of the Zet water channel 31 is formed so that it may become small toward a downstream (FIG. 6), it flows through the inside of the Zet water channel 31. The washing water can be accelerated with little energy loss, and the flow rate of the washing water discharged from the jet water discharge port 32 can be increased. As a result, it is possible to discharge the accumulated water and filth in the bowl portion 20 with less washing water while suppressing the generation of abnormal noise due to the acceleration of the washing water.

  Furthermore, according to the flush toilet 1 of the present embodiment, since the washing water is pressurized and introduced into the water conduit inflow portion 31a by the pressurizing pump 36, the flow rate of the washing water flowing in the jet conduit 31 is increased. It is possible to discharge the accumulated water and the filth in the bowl portion 20 in a shorter time while suppressing the generation of noise due to the acceleration of the washing water.

  Moreover, according to the flush toilet 1 of this embodiment, since at least one part of the ceiling surface of the zette water conduit 31 is comprised by the wall surface which forms the bottom part of the bowl part 20 (FIG. 4), simple structure Thus, the flush toilet body 2 can be formed in which the portion of the jet conduit 31 on the downstream side of the conduit inflow portion 31a is disposed below the reservoir surface.

  As mentioned above, although preferable embodiment of this invention was described, a various change can be added to embodiment mentioned above. In particular, in the embodiment described above, the present invention has been applied to a flush toilet that pressurizes washing water discharged from a jet outlet with a pressure pump, but washing is performed using the water pressure of a water supply source such as a water supply. The present invention can be applied to any flush toilet such as a direct water pressure type that discharges water from a jet outlet, or a tank type that discharges wash water using the head pressure of wash water in a water storage tank. In addition, the present invention can be applied to flush toilets that employ any water supply method for rim water discharge.

DESCRIPTION OF SYMBOLS 1 Flush toilet according to embodiment of this invention 2 Flush toilet main body 4 Toilet seat 6 Toilet lid 8 Functional part 12 Water supply system functional part 14 Soil receiving surface 14a Side wall surface 14b Bottom wall surface 16 Shelf surface 18 Rim part 20 Bowl part 22 Drain trap Pipe line 22a Inlet opening 22b Rising pipe line 22c Bending part 22d Down pipe line 24 Rim water passage 26 Rim water outlet 28 Water conduit 30 Water conduit 31 Zet water conduit 31a Water conduit inflow part 31b Water conduit middle part 31c Water conduit curved part 32 Zet spout 34 Reservoir tank 36 Pressure pump

Claims (4)

A flush toilet that discharges wash water from a jet outlet and discharges filth.
It has a flush toilet body made of ceramics, and this flush toilet body
A bowl portion having a bowl-shaped waste receiving surface;
A rising pipe extending obliquely upward from the bottom of the bowl part, a bent part provided at the downstream end of the rising pipe and defining the height of the water surface of the bowl part, and downward from the bent part A drain trap line with a downwardly extending down line,
A Zet water conduit that extends from a water conduit inflow portion for allowing flush water to flow into the flush toilet body to a Zet spout provided at the bottom of the bowl portion, and that guides wash water to the Zette spout;
Is formed,
The jet outlet is disposed so as to face the inlet opening of the drain trap pipe, and the opening area of the jet outlet is formed narrower than the cross-sectional area of the base end portion of the jet conduit. The flush toilet according to claim 1, wherein a portion of the zet water channel downstream of the water channel inflow portion is disposed below a water storage surface defined by the bent portion.   The flush toilet according to claim 1, wherein the zet waterway is formed so that a cross-sectional area of the channel becomes smaller toward the downstream side.   The flush toilet according to claim 1, further comprising a pressurizing pump, wherein the pressurizing pump pressurizes and flows the wash water into the water conduit inflow portion of the flush toilet body.   The flush toilet according to any one of claims 1 to 3, wherein at least a part of the ceiling surface of the zet water conduit is formed by a wall surface forming a bottom portion of the bowl portion.

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