JP2014062431A - Flush toilet bowl - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flush toilet bowl capable of improving discharge performance of dirt and the like by effectively forming vertically swirling flow in regard to wash water supplied from a flush valve to a bowl part of the toilet bowl.SOLUTION: An inventive flush toilet bowl 1 includes: a first water discharge part 26 which discharges wash water onto a rim part 20 and forms swirl flow on a dirt receiving surface; a second water discharge part 28 which is formed on the side face of a bowl part 10, below the dirt receiving surface, and above an initial reserved water level L, and forms a flow agitating vertically wash water in the bowl part; a first water flow passage 12 supplying wash water to the first water discharge part; and a second water flow passage 14 supplying wash water to the second water discharge part. The second water flow passage comprises: an inflow part 38 into which wash water supplied from a flush valve 6 flows; an expansion part 40 so formed that a flow passage becomes gradually larger from the inflow part toward a downstream side; and a throttle part 42 formed near the second water discharge part so that a flow passage becomes gradually smaller from the expansion part toward a downstream side.

Description

  The present invention relates to a flush toilet, and more particularly to a flush toilet in which a toilet body is washed with flush water supplied from a flush valve to discharge filth.

Conventionally, as a flush toilet that cleans a toilet and discharges filth, for example, as described in Patent Document 1, a swirling flow that discharges washing water to the rim and swirls on the filth receiving surface is used. A first water discharge port to be formed, and further formed on a side surface of the bowl portion and below the filth receiving surface and above the initial stored water level to discharge the wash water into the bowl portion in a substantially horizontal direction. And what was equipped with the 2nd water discharge port which forms the flow which stirs the washing water in a bowl part up and down is known.
In such a flush toilet described in Patent Document 1, conventionally, only the swirl flow formed by the wash water discharged from the first water discharge port is used to discharge floating waste suspended in the bowl portion. In order to solve the problem of low, it is possible to form a swirling flow in the vertical direction (vertical direction) using the wash water discharged from the second water outlet provided in addition to the first water outlet. It has become. And by this vertical swirl flow, the floating filth on the water surface is submerged in the stored water and can be discharged from the trap pipe together with the filth that has submerged in the stored water.

Further, the flush toilet described in Patent Document 1 includes a water storage tank as a water source for supplying wash water to the toilet bowl, and the flush water stored in the water storage tank has a relatively high instantaneous flow rate (for example, About 120 to 140 [l / min]), the toilet is instantaneously supplied.
By the way, as a water source other than the water storage tank that supplies flush water to the toilet bowl, there is a flush valve directly connected to the water supply pipe (water supply), and this flush valve is mainly a mechanical type that is mechanically operated by manual operation. There are flash valves and electric flash valves that are electrically operated by signals transmitted from human body sensors, touch switches, and the like.
Here, FIG. 9 shows various drainage characteristics (time t and instantaneous flow rate Q for a conventional water storage tank, a mechanical flush valve, and an electrical flush valve applied as a water source for supplying wash water to a general toilet. Example). As shown in FIG. 9, each wash water source of the water storage tank, the mechanical flush valve, and the electrical flush valve has a different waveform of drainage characteristics. In particular, when a mechanical flash valve or an electric flash valve is applied, an instantaneous flow rate (for example, about 120 to 140 [l / min]) lower than that when a water storage tank is applied (for example, About 70 to 90 [l / min]).

JP 2010-180587 A

However, in the conventional flush toilet described in Patent Document 1 described above, only a water storage tank is applied as a source of cleaning water. For example, a mechanical flash valve or an electric flash is used instead of the water storage tank. When the valve is applied, flush water can be supplied to the toilet only at a lower instantaneous flow rate than when the water storage tank is applied. Therefore, since the momentum of the washing water discharged from the second water outlet is also weakened, a sufficient swirling flow in the vertical direction (vertical direction) cannot be formed in the bowl portion, and the discharge performance of filth and the like is reduced. There is a problem of end. Such problems are becoming more and more remarkable due to the recent saving of toilet flushing water.
Furthermore, in the above-described conventional flush toilet, when a flush valve is applied to a toilet with water saving, no structural contrivances or countermeasures have been taken for improving the waste discharge performance. Therefore, even when a flush valve with a lower instantaneous flow rate than that of a water storage tank is applied, regardless of the type of flush valve, toilet flushing is performed with a certain drainage characteristic to obtain sufficient discharge performance of filth, etc. This is also an important issue.

  Therefore, the present invention has been made to solve the above-described problems and problems of the prior art, and effectively flows the flow of swirling the cleaning water supplied from the flush valve into the bowl portion of the toilet bowl in the vertical direction. An object of the present invention is to provide a flush toilet that can be formed to improve the discharge performance of filth and the like.

In order to achieve the above-mentioned object, the present invention is a flush toilet that cleans a toilet body with flush water supplied from a flush valve to discharge filth, a bowl-shaped filth receiving surface, A bowl portion having a rim portion located above the surface, and a trap pipe that extends in communication with the bottom portion of the bowl portion and discharges filth in the bowl portion and defines an initial water level of the bowl portion A first water spouting part for discharging cleaning water to the rim part to form a swirling flow swirling on the filth receiving surface, a side surface of the bowl part and below the filth receiving surface and the initial reservoir. A second water discharge part that is formed at a position above the water level and discharges the wash water into the bowl part to form a flow in which the wash water in the bowl part is stirred in the vertical direction, and the first water discharge part is washed. 1st waterway that supplies water A second water passage that supplies wash water to the second water discharge portion, and the second water passage includes an inflow portion into which the wash water supplied from the flash valve flows, and a downstream side from the inflow portion. An expansion part formed so that the flow path gradually increases toward the downstream side, and a throttle part formed near the second water discharge part so that the flow path gradually decreases from the expansion part toward the downstream side, The flow path cross-sectional area of the inflow part and the throttle part is set smaller than the flow path cross-sectional area of the other part other than the inflow part and the throttle part in the second water passage. Yes.
In the present invention configured as described above, the second water passage has a throttle portion in the vicinity of the second water discharge portion on the downstream side, and the flow passage cross-sectional area of the throttle portion is the inflow in the second water passage. Since it is set smaller than the cross-sectional area of the flow path other than the part and the throttle part, it is cleaned with a relatively small instantaneous flow rate (for example, 70 to 90 [l / min]) from the flash valve to the second water passage. Even if water is supplied, it is possible to increase the flow rate of the washing water that passes through the throttle portion, and it is possible to discharge vigorous washing water from the second water discharge portion into the bowl portion. Therefore, it is possible to effectively form a flow that swirls the cleaning water discharged from the second water discharge portion into the bowl portion in the vertical direction (longitudinal direction) and to form a flow that stirs the vertical direction in the water stored in the bowl portion. Therefore, the discharge performance of filth and the like can be improved. In addition, since the flow passage cross-sectional area of the inflow portion of the second water passage is set smaller than the flow passage cross-sectional area of the other portion other than the inflow portion and the throttle portion of the second water passage, the flow passage is supplied from the flash valve. When the wash water passes through the inflow portion, the flow rate can be made almost constant regardless of the type of flush valve applied. Therefore, the flow rate becomes substantially constant and the flow rate is improved by passing through the throttle portion, so that the cleaning performance and the waste discharging performance in the bowl portion can be improved.
Further, the second water passage has an expansion portion between the inflow portion and the throttle portion, and the flow passage in the second water passage is expanded by the expansion portion more than the flow passage of the inflow portion and the throttling portion. Therefore, it is possible to suppress fluid resistance against the cleaning water flowing in the expansion portion and rectify the cleaning water supplied to the throttle portion. Therefore, it is possible to form a vigorous wash water with an increased flow velocity at the throttle portion, and to effectively flow the water swirled from the second water discharge portion into the bowl portion in the vertical direction (vertical direction). It is possible to improve the discharge performance of filth and the like.

In the present invention, preferably, the flow path cross-sectional area of the inlet portion and the diaphragm portion of the second water passage is 500mm ² ~600mm ^2.
In the present invention configured as described above, even if the cleaning water is supplied from the flash valve to the second water passage at a relatively small instantaneous flow rate (for example, 70 to 90 [l / min]), it passes through the throttle portion. It is possible to increase the flow rate of the cleaning water to be discharged, and it is possible to discharge vigorous cleaning water from the second water discharge portion into the bowl portion. Therefore, it is possible to effectively form a flow that swirls the cleaning water discharged from the second water discharge portion into the bowl portion in the vertical direction (longitudinal direction) and to form a flow that stirs the vertical direction in the water stored in the bowl portion. Therefore, the discharge performance of filth and the like can be improved. In addition, when the wash water supplied from the flush valve passes through the inflow section, the flow rate can be made almost constant regardless of the type of flush valve applied, and the cleaning performance and waste discharge performance in the bowl section can be improved. Can be improved. Furthermore, it is possible to form a vigorous wash water with an increased flow velocity at the throttle portion, and to effectively flow the water swirled into the bowl portion from the second water discharge portion in the vertical direction (vertical direction). It is possible to improve the discharge performance of filth and the like.

In the present invention, preferably, the second water passage is further formed downstream of the throttle portion and upstream of the second water discharge portion, and the wash water that has passed through the throttle portion of the second water passage is passed through the second water passage. A bending portion formed by bending so as to be directed toward the water discharge portion is provided.
In the present invention configured as described above, the wash water having a momentum flowing through the expansion portion of the second water passage and converging at the throttle portion and having an increased flow velocity collided with the bent portion in the second water passage. Since the water is later directed to the second water discharger, the vigorous wash water can be discharged from the second water discharger into the bowl part in a predetermined water discharge direction. Therefore, it is possible to effectively form a flow that swirls the cleaning water discharged from the second water discharge portion into the bowl portion in the vertical direction (longitudinal direction) and to form a flow that stirs the vertical direction in the water stored in the bowl portion. And discharge performance of filth and the like can be improved.

In the present invention, preferably, the bent portion includes a protruding portion formed so that a front wall surface in the flow channel protrudes substantially forward, and the second portion on the downstream side from the upstream side of the protruding portion. It is bent toward the water discharge part.
In the present invention configured as described above, the bent portion includes a protruding portion formed so that the front side wall surface in the flow channel protrudes to the front side, and the first portion on the downstream side from the upstream side of the protruding portion is provided. 2 Since the water is formed so as to bend toward the water discharge part, after most of the washing water that has passed through the throttle part collides with the wall surface on the front side of the overhanging part of the bending part, the second water discharge along the wall surface of the overhanging part The washing water that is guided smoothly to the portion and vigorous from the second water discharge portion can be discharged toward the inside of the bowl portion in a predetermined water discharge direction. Therefore, it is possible to more effectively form a flow that swirls the cleaning water discharged from the second water discharge portion into the bowl portion in the vertical direction (longitudinal direction), and a flow that stirs the water stored in the bowl portion in the vertical direction. It is possible to improve the discharge performance of filth and the like.

In the present invention, it is preferable that the bowl portion further includes a step portion that is formed closer to the center of the bowl portion than the filth receiving surface and is positioned below the initial water level, and the second water discharge. The part is directed to the stepped part.
In the present invention configured as described above, the second water discharge portion is formed on the center side in the bowl portion with respect to the filth receiving surface, and is directed to the step portion positioned below the initial stored water level. In addition, it is possible to more effectively form a flow in which most of the washing water discharged from the second water discharger into the bowl part swirls in the vertical direction (longitudinal direction) after colliding with the stepped part in the bowl part. Therefore, a flow of stirring in the vertical direction can also be formed for the water stored in the bowl portion, and the discharge performance of filth and the like can be improved.

In this invention, Preferably, the inflow part of the said 2nd water flow path is formed so that the flow-path cross section may be faced diagonally downward toward the downstream.
In the present invention configured as described above, the flow passage cross-sectional area of the inflow portion of the second water passage is set smaller than the flow passage cross-sectional area of the other portion other than the inflow portion and the throttle portion in the second water passage. As a result, even if the wash water supplied from the flush valve is difficult to flow from the inflow portion of the second water passage, the cross section of the inflow portion of the second water passage is obliquely downward toward the downstream side. Since it is directed, the washing water can smoothly flow into the second water passage from the inflow portion. Therefore, it is possible to discharge vigorous wash water from the second water discharge portion into the bowl portion in a predetermined water discharge direction, and the wash water discharged from the second water discharge portion into the bowl portion in the vertical direction (vertical direction). The swirling flow can be formed more effectively. Therefore, it is possible to form a flow that stirs in the vertical direction for the water stored in the bowl portion, and it is possible to improve the discharge performance of filth and the like.

  According to the flush toilet of the present invention, the wash water supplied from the flush valve into the bowl portion of the toilet bowl can be effectively formed with a flow that swirls in the vertical direction, and the discharge performance of filth and the like can be improved.

It is a schematic perspective view which shows the flush toilet bowl by one Embodiment of this invention. It is a top view in the state where a flush valve and a toilet seat were omitted in a flush toilet according to an embodiment of the present invention. It is sectional drawing seen along the III-III line of FIG. It is sectional drawing seen along the IV-IV line of FIG. It is sectional drawing seen along the VV line of FIG. It is a side view which shows the internal structure of the flush toilet by one Embodiment of this invention. It is the elements on larger scale which looked at the jet waterway part of the internal structure of the flush toilet based on one Embodiment of this invention shown in FIG. 6 from diagonally downward. It is the elements on larger scale which expanded the jet waterway part of the flush toilet according to one Embodiment of this invention shown in FIG. An example of each drainage characteristic (relation between time and instantaneous flow rate) relating to a conventional water storage tank, a mechanical flush valve, and an electrical flush valve applied as a water source for supplying wash water to a general toilet is shown.

Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic perspective view showing a flush toilet according to an embodiment of the present invention.
As shown in FIG. 1, a flush toilet 1 according to an embodiment of the present invention is a so-called flush-type flush toilet in which filth is washed away by flowing water due to a drop of water in a bowl portion. The main body 2, the toilet seat 4 disposed on the upper surface of the toilet body 2, and the electricity that is attached to the rear part of the toilet body 2, stores washing water used for toilet cleaning and supplies the toilet body 2 with water And a flash valve device 6 of the type.

A water supply pipe 8 is connected to the upstream side of the electric flash valve device 6 via a water stop cock (not shown), and the upstream side of the water supply pipe 8 is a water supply source (not shown) such as water supply. Connected). The flash valve device 6 has a built-in human body sensor 6a. After the human body sensor 6a senses a user (human body) of the toilet 1, when the user leaves the sensor 6a after using the toilet, An on-off valve (not shown) built in the flash valve device 6 opens a water passage (not shown) in the flash valve device 6 and discharges wash water supplied from the water supply pipe 8 to the toilet body 2. It is like that.
In the present embodiment, an embodiment in which an electric flash valve device is applied as a washing water source for supplying washing water to the toilet body 2 will be described. However, the embodiment is not limited to such an embodiment, and the flushing is mechanically performed manually. It may be a form to which a mechanical flash valve device for operating the valve is applied.

FIG. 2 is a plan view of a flush toilet according to an embodiment of the present invention with a flush valve and a toilet seat omitted. 3 is a cross-sectional view taken along line III-III in FIG. 2, FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 2, and FIG. It is sectional drawing seen along the V line.
As shown in FIGS. 2 to 5, a bowl portion 10 is formed at the front upper portion of the toilet body 2, and a rim water conduit 12 and a jet water conduit 14, which will be described in detail later, are formed at the rear upper portion. A drain trap pipe 16 is formed below the bowl portion 10.

  As shown in FIGS. 2 to 5, the bowl portion 10 includes a bowl-shaped filth receiving surface 18 and a rim portion 20 that forms an upper edge portion thereof. In addition, a first shelf portion 22 is formed on the upper edge of the filth receiving surface 18 of the bowl portion 10 so as to extend substantially on a horizontal plane along the rim portion 20. The first shelf portion 22 extends along the inner circumference of the bowl portion 10 from the left rear portion of the bowl portion 10 as viewed from the front, through the front portion of the bowl portion 10 to the right rear portion. Furthermore, the 1st shelf part 22 is inclined and formed inside so that it may become low toward the inner peripheral part from the outer peripheral part. Further, the inner side surface 20a of the rim portion 20 has a shape that overhangs inward so that the washing water does not jump out. In the flush toilet of this embodiment, it is not always necessary to overhang the rim shape toward the inside, and even when the rim shape is not overhanged, the flushing water can be prevented from jumping out of the toilet. Yes.

Further, as shown in FIGS. 3 to 5, a step portion 24 is formed at the center side and below the filth receiving surface 18 of the bowl portion 10, and this step portion 24 is a reservoir of the bowl portion 10 during standby. It is located below the initial stored water level L which is the water level.
Further, as shown in FIG. 3, an inlet 16a of the drain trap pipe 16 described above is opened below the stepped portion 24, and an ascending pipe 16b extends rearward from the inlet 16a, and passes through a top part 16c to a descending pipe. 16d is formed continuously, and the lower end of the descending pipe 16d is connected to a discharge pipe (not shown) installed under the floor or the like via a drain socket (not shown). The downstream side of the descending pipe 16d may be connected to a discharge pipe (not shown) installed on the back side of the wall that extends to the rear side of the toilet main body 2 and is located on the back side of the flush toilet 1.

  As shown in FIGS. 2, 3, and 5, a first rim spout 26 is formed in the first shelf 22 of the bowl 10 so that the water discharge direction A is the forward direction of the toilet bowl. . The first rim water spouting port 26 is formed on the left rear as viewed from the front of the bowl portion 10. From the first rim spout 26, the wash water supplied from the flash valve device 6 is discharged in a substantially horizontal direction toward the bowl portion 10 through the rim conduit 12.

Further, as shown in FIG. 2, a second rim spout 28 is formed in a direction along a direction substantially perpendicular to the longitudinal direction of the rear toilet on the right side when viewed from the front of the first shelf portion 22 of the bowl portion 10. ing. Similarly, from the second rim spout 28, the cleaning water supplied from the flash valve device 6 is discharged from the first rim spout 26 toward the bowl 10 through the rim conduit 12. Water is discharged in a substantially horizontal direction so as to form a swirl flow in the same direction as swirl flow B formed by water. That is, the wash water discharged from the first rim water discharge port 26 and the second rim water discharge port 28 forms a swirl flow B, and the swirl flow B passes along the first shelf 22 and the inner circumference of the rim portion 20. The filth receiving surface 18 is washed by falling downward while turning.
The second rim spout 28 may not be provided. In that case, the cleaning water is discharged from only the first rim spout 26.

  Next, as shown in FIG. 5, a second shelf 30 is formed on the middle of the left side as viewed from the front of the filth receiving surface 18 of the bowl 10. The second shelf 30 is substantially the bottom surface of the jet conduit 14 extending from the left rear portion of the bowl portion 10 to a position closer to the front portion of the side surface portion of the bowl portion 10. It extends obliquely downward toward the step 24 located. Furthermore, an inner wall portion 32 is formed above the second shelf portion 30 so as to protrude from the center side of the bowl portion 10 so as to cover the second shelf portion 30.

  A jet water outlet 34 is formed between the second shelf tip 30 a of the second shelf 30 and the lower end of the inner wall 32. This jet spout 34 is on the left side surface of the bowl portion 10, below the filth receiving surface 18 and above the initial accumulated water level L, and further, the center position C in the front-rear direction of the bowl portion 10 (see FIG. 3). Located in the vicinity.

  Furthermore, as shown in FIG. 5, the jet spout 34 is directed to the stepped portion 24, and when cleaning water is spouted from the jet spout 34 toward the inside of the bowl portion 20, In the upper region, a swirling flow D in the vertical direction (vertical direction) is formed and stays on the spot.

Here, as shown in FIG. 3, a common water conduit 36 is formed in the rear part of the toilet body 2, and the rear end side of the common water conduit 36 communicates with the flash valve device 6. Washing water is supplied from.
Further, a rim water conduit 12 that supplies cleaning water to the first rim water outlet 26 and the second rim water outlet 28 is formed at the front end side of the common water conduit 36, and the cleaning water is further supplied to the jet water outlet 34. Is formed. That is, the rim conduit 12 and the jet conduit 14 are branched from the downstream side of the common conduit 36 in the vicinity of the back side of the bowl portion 10.

Next, with reference to FIGS. 2 to 8, details of the jet conduit 14 of the flush toilet 1 will be described.
6 is a side view showing an internal structure of a flush toilet according to an embodiment of the present invention, and FIG. 7 is a jet conduit portion of the internal structure of the flush toilet according to an embodiment of the present invention shown in FIG. FIG. 8 is a partially enlarged plan view in which the jet water conduit portion of the flush toilet according to the embodiment of the present invention shown in FIG. 2 is enlarged.

As shown in FIGS. 3 and 6 to 8, the washing water supplied from the flush valve device 6 to the common conduit 36 is divided into the rim conduit 12 on the upstream side of the jet conduit 14. An inflow port 38 into which other cleaning water flows is formed.
Further, the jet conduit 14 is provided with an extended portion 40 formed near the middle of the entire jet conduit 14 so that the flow passage gradually increases from the inflow port 38 toward the downstream side. Yes.
Further, the jet water guide path 14 includes a throttle portion 42 formed in the vicinity of the upstream side of the jet water outlet 34 so that the flow path gradually decreases from the expansion portion 40 toward the downstream side.

Here, assuming that the flow passage cross-sectional area of the jet water outlet 34 located on the most downstream side of the jet conduit 14 is S0 (see FIG. 3), the flow passage cross-sectional area S1 (see FIG. 7) of the inlet 38 is It is set smaller than the channel cross-sectional area S0 of the jet water spouting port 34 (for example, S1 = 0.71S0).
In addition, the channel cross-sectional area S2 (see FIG. 7) of the expansion portion 40 is set to have the largest channel cross-sectional area among the channel cross-sections in the entire area of the jet conduit 14, and the flow rate of the jet spout 34 is reduced. It is larger than the road cross-sectional area S0 (for example, S1 = 1.42S0).
Further, the flow passage cross-sectional area S3 (see FIG. 7) of the throttle portion 42 is set to be smaller than the flow passage cross-sectional area S0 of the jet water spouting port 34, and is substantially the same as the flow passage cross-sectional area S1 of the inflow port 38. (For example, S3 = 0.70S0).

  That is, the flow path cross-sectional area S1 of the inflow port 38 and the flow path cross-sectional area S3 of the throttle portion 42 are larger than the flow path cross-sectional areas of other portions of the jet conduit 14 other than both the inlet port 38 and the throttle portion 42. It is set small. Thereby, even if it supplies with the comparatively small instantaneous flow volume (for example, 70-90 [l / min]) from the flash valve apparatus 6 to the jet conduit 14, the flow rate of the washing water passing through the throttle part 42 is increased. Thus, it is possible to discharge the vigorous washing water from the jet water outlet 34 into the bowl portion 10. Therefore, it is possible to effectively form a flow that swirls the cleaning water spouted from the jet spout 34 into the bowl portion 10 in the vertical direction (vertical direction), and the water that stirs the water stored in the bowl portion 10 in the vertical direction. The discharge performance of filth and the like can be improved.

Further, since the flow passage cross-sectional area S1 of the inflow port 38 is set to be smaller than the flow passage cross-sectional area of other portions other than both the inflow port 38 and the throttle portion 42 in the jet conduit 14, the flash valve device. When the washing water supplied from 6 passes through the inlet 38, the flow rate can be made substantially constant regardless of the type of the flush valve applied. Accordingly, the flow rate becomes substantially constant and the flow rate is improved by passing through the throttle portion 42, so that the cleaning performance and the waste discharge performance in the bowl portion 10 can be improved.
Further, when the cleaning water supplied from the flash valve device 6 to the common water conduit 36 is divided into the rim water conduit 12 and the jet water conduit 14, the rim regardless of the type of the flash valve device applied. The distribution ratio between the flow rate supplied to the water conduit 12 and the flow rate supplied to the jet conduit 14 can be set constant. Therefore, the wash water can be discharged into the bowl portion 10 from each of the rim water guide channel 12 and the jet water guide channel 14 at an appropriate distribution ratio, and the cleaning performance and the waste discharge performance in the bowl portion 10 are improved. Can be done.

  Further, since the flow path in the middle of the jet conduit 14 (intermediate portion) is expanded by the expansion portion 40 of the jet conduit 14 than the flow passage of the inlet 38 and the throttle portion 42, the expanded portion 40 is expanded. A larger amount of washing water can be accommodated in the jet conduit 14 as much as the space of the flow path, and the fluid resistance to the washing water flowing in the expansion part 40 is suppressed, and the washing water supplied to the throttle part 42 Can be rectified. Accordingly, it is possible to form a vigorous wash water having an increased flow velocity at the throttle portion 42, and a flow that swirls the wash water discharged from the jet spout 34 into the bowl portion 10 in the vertical direction (vertical direction). Effectively formed, it is possible to improve the discharge performance of filth and the like.

Incidentally, as an example of the flow path cross-sectional area in each part of the jet water conduit 14, the flow path cross-sectional area S0 of the jet water spouting port 34 is preferably set to 700mm ² ~900mm ^2, to 750mm ² ~850mm ² Most preferably, it is set.
Further, the flow path cross-sectional area S3 of the flow path sectional area S1 and the throttle portion 42 of the inlet 38 is preferably set to 450mm ² ~650mm ^2, and most preferably set to 500mm ² ~600mm ^2.
Further, the flow path cross-sectional area S2 of the expansion portion 40 is preferably set to 900mm ² ~1300mm ^2, and most preferably set to 1000mm ² ~1200mm ^2.

  Next, as shown in FIG. 7, the inlet 38 of the jet conduit 14 is formed such that a surface normal vector N perpendicular to the cross section of the flow channel is directed obliquely downward toward the downstream side. Has been. Accordingly, the cleaning water supplied from the flash bubble device 6 to the common conduit 36 can smoothly flow into the jet conduit 14 from the inlet 38 of the jet conduit 14.

  Further, as shown in FIGS. 7 and 8, the jet conduit 14 is further formed downstream of the throttle 42 and upstream of the jet spout 34, and the wash water that has passed through the throttle 42 is allowed to flow into the jet spout 34. A bent portion 44 formed by bending so as to be directed toward the outside is provided. As a result, the washing water having a momentum flowing through the expansion portion 40 of the jet conduit 14 and converging at the throttle portion 42 and having an increased flow velocity collides with the bent portion 44 in the jet conduit 14, and then jets out. The washing water that is directed to the water outlet 34 and is vigorously discharged from the jet water outlet 34 into the bowl portion 10 in a predetermined water discharging direction. Therefore, it is possible to effectively form a flow that swirls the cleaning water spouted from the jet spout 34 into the bowl portion 10 in the vertical direction (vertical direction), and the water that stirs the water stored in the bowl portion 10 in the vertical direction. Can be formed.

  Further, as shown in FIG. 8, the bent portion 44 includes an overhanging portion 44a formed so that the front wall surface in the flow channel protrudes forward from the jet spout 34 by a predetermined distance d. The portion 44a is bent from the upstream side (rear side) toward the downstream (center side) jet spout 34. By the protruding portion 44a of the bent portion 44, most of the washing water that has passed through the throttle portion 42 collides with the wall surface (front side wall surface) of the protruding portion 44a of the bent portion 44, and then jet jets along the wall surface of the protruding portion 44a. The water is smoothly guided to the water outlet 34, and vigorous cleaning water is discharged from the jet water outlet 34 into the bowl portion 10 in a predetermined water discharge direction.

  Further, as shown in FIGS. 5 and 8, the jet water outlet 34 is formed on the center side in the bowl portion 10 with respect to the filth receiving surface 18 and to the step portion 24 positioned below the initial stored water level L. The water discharge direction E discharged from the jet water outlet 34 into the bowl portion 10 is set so that most of the washing water collides with the step portion 24 in the bowl portion 10. The washing water discharged from the jet water outlet 34 and colliding with the step portion 24 effectively forms a swirl flow D in the vertical direction (vertical direction) in the region above the step portion 24. ing.

Next, the operation of the flush toilet according to this embodiment described above will be described.
First, in the standby state of the flush toilet 1, the water level in the bowl portion 8 is the initial water level L.
Next, after the human body sensor 6a of the flash valve device 6 senses the presence of the user, when the user leaves the sensor 6a after using the toilet, an on-off valve (not shown) built in the flash valve device 6 is used. Opens a water passage (not shown) in the flush valve device 6, and the flush water in the water supply pipe 8 is supplied from the flush valve device 6 to the common water conduit 36 of the toilet body 2.
Further, the cleaning water in the common conduit 36 is divided into the rim conduit 12 and the jet conduit 14 on the tip side of the common conduit 36.

  Next, as shown in FIG. 2, the wash water supplied from the rim conduit 12 to the first rim spout 26 is discharged from the first rim spout 26 in the forward direction of the toilet (spout direction A in FIG. 2). Thus, a swirl flow B that flows along the first shelf 22 and swirls on the filth receiving surface 18 is formed. Then, this washing water cleans the filth receiving surface 18 of the bowl part 10 while turning, and flows into the bottom part of the bowl part 10. Similarly, the wash water supplied from the rim conduit 12 to the second rim spout 28 is the same as the swirl flow B formed by the wash water discharged from the first rim spout 26 toward the bowl portion 10. The water is discharged in a substantially horizontal direction so as to form a swirling flow in the direction, and the surface on the rear side of the filth receiving surface 18 of the bowl portion 10 is washed and swirled toward the front side of the filth receiving surface 18 and flows into the bottom portion of the bowl portion 10. To do.

On the other hand, as shown in FIG. 5, the wash water that has flowed into the jet conduit 14 from the common conduit 36 through the inlet 38 of the jet conduit 14 is larger than the cross-sectional area S1 of the inlet 38. By flowing through the expanded portion 40 having the flow path cross-sectional area S2, the fluid resistance is suppressed and the flow flows to the throttle portion 42 in a rectified state. Then, the wash water that has passed through the throttle 40 having the flow passage cross-sectional area S3 that is smaller than the flow passage cross-sectional area S2 of the expansion portion 40 is moved to the bent portion 44 in a state where the flow velocity is increased and the momentum is increased. Flowing.
Further, as shown in FIG. 8, when the cleaning water passes through the bent portion 44, it collides with the wall surface (front wall surface) of the projecting portion 44a projecting forward from the jet spout 34 on the downstream side, and then this projecting portion is projected. The water is smoothly guided along the wall surface of the portion 44 a to the jet water spouting port 34, and vigorous cleaning water is spouted from the jet water spouting port 34 into the bowl portion 10 in a predetermined water discharging direction.

The washing water supplied from the jet conduit 14 to the jet water outlet 34 is directed from the jet water outlet 34 to the step portion 24 of the bowl portion 10 and discharged in the water discharge direction E of FIG. As a result, a swirl flow D in the vertical direction (vertical direction) is formed, and the water stored in the bowl portion 10 is stirred in the vertical direction.
While this vertical swirl flow D stays in the bowl 10, the floating filth floating on the surface of the water before washing is submerged in the stored water, and the floating filth and the filth that has submerged in the water are separated. Concentrate at the center of rotation. After that, when the water level in the bowl portion 10 rises due to the vertical swirl flow D, the water level in the drain trap pipe 16 also rises, and a head required to discharge the filth in the drain trap pipe 16 is secured. It is possible to effectively discharge floating filth and filth that has submerged in the stored water.

According to the flush toilet 1 according to the above-described embodiment of the present invention, the upstream side of the jet water outlet 34 is such that the flow path of the jet conduit 14 gradually decreases from the expanded portion 40 toward the downstream side. The throttle section 42 formed in the vicinity is provided, and the flow path cross-sectional area S3 of the throttle section 42 is larger than the flow path cross-sectional areas of portions other than the inlet 38 and the throttle section 42 in the jet conduit 14. Even if cleaning water is supplied from the flash valve device 6 to the jet conduit 14 at a relatively small instantaneous flow rate (for example, 70 to 90 [l / min]) because it is set small, it passes through the throttle 42. The flow rate of the wash water to be increased can be increased, and the vigorous wash water can be discharged into the bowl portion 10 from the jet spout 34. Therefore, it effectively forms a flow (swirl flow D) that swirls the cleaning water spouted from the jet spout 34 into the bowl portion 10 in the vertical direction (vertical direction). Since a flow that stirs in the direction can be formed, the discharge performance of filth and the like can be improved.
Further, when the washing water supplied from the flash valve device 6 passes through the inflow port 38, the flow rate can be made almost constant regardless of the type of the flash valve applied. Accordingly, the flow rate becomes substantially constant and the flow rate is improved by passing through the throttle portion 42, so that the cleaning performance and the waste discharge performance in the bowl portion 10 can be improved.
Further, since the flow passage cross-sectional area S1 of the inlet 38 of the jet conduit 14 is set to be smaller than the flow passage cross-sectional area of other portions other than the inlet 38 and the throttle portion 42, the flash valve device 6 Is supplied to the rim water conduit 12 regardless of the type of the flush valve device applied when the wash water supplied from the water is diverted from the common water conduit 36 to each of the rim water conduit 12 and the jet water conduit 14. The distribution ratio between the cleaning flow rate and the flow rate supplied to the jet conduit 14 can be set constant. Therefore, the wash water can be discharged into the bowl portion 10 from each of the rim water discharge ports 26 and 28 and the jet water discharge port 34 at an appropriate distribution ratio, and the cleaning performance and the waste discharge performance in the bowl portion 10 are improved. Can do.
Further, the jet conduit 14 includes an extended portion 40 between the inlet 38 and the constricted portion 42, and the extended portion 40 allows a channel in the middle (intermediate portion) of the jet conduit 14 to be the inlet. 38 and the flow path of the throttle part 42, so that a larger amount of washing water can be accommodated in the jet conduit 14 by the space of the expanded flow path, and in the expansion part 40 It is possible to suppress the fluid resistance to the wash water flowing through the water and rectify the wash water supplied to the throttle unit 42. Accordingly, it is possible to form a vigorous wash water having an increased flow velocity at the throttle portion 42, and a flow D that swirls the wash water discharged from the jet water outlet 34 into the bowl portion 10 in the vertical direction (vertical direction). Can be effectively formed, and the discharge performance of filth and the like can be improved.

  Further, according to the flush toilet 1 according to the present embodiment, the bent portion 44 of the jet conduit 14 includes a protruding portion 44a formed so that the front side wall surface in the flow channel protrudes substantially forward, Since it is formed to bend from the upstream side of the overhanging portion 44 a toward the downstream jet spout 34, most of the washing water that has passed through the throttle portion 42 is on the wall surface on the front side of the overhanging portion 44 a of the bending portion 44. After the collision, the water is smoothly guided to the jet water spouting port 34 along the wall surface of the overhanging portion 44a, and the irrigating cleaning water is spouted from the jet water spouting port 34 into the bowl portion 10 in a predetermined water discharging direction E. Can do. Therefore, it is possible to more effectively form a flow D that swirls the cleaning water discharged from the jet water discharge port 34 into the bowl portion 10 in the vertical direction (vertical direction), and the water stored in the bowl portion 10 is also stirred in the vertical direction. The flow D to be formed can be formed, and the discharge performance of filth and the like can be improved.

  Furthermore, according to the flush toilet 1 according to the present embodiment, the jet water spouting port 34 is formed on the center side in the bowl portion 10 with respect to the filth receiving surface 18 and is located below the initial stored water level L. Since most of the washing water spouted from the jet spout 34 into the bowl part 10 collides with the step part 24 in the bowl part 10, it is swung in the vertical direction (vertical direction). The flow D can be formed more effectively. Therefore, a flow of stirring in the vertical direction can also be formed for the accumulated water in the bowl portion 10, and the discharge performance of dirt and the like can be improved.

  Further, according to the flush toilet 1 according to the present embodiment, the flow path cross-sectional area S1 of the inlet 38 of the jet conduit 14 is the flow of the portion other than the inlet 38 and the throttle portion 42 in the jet conduit 14. Even if it is difficult for the cleaning water supplied from the flush valve device 6 to flow from the inlet 38 of the jet conduit 14, the flow of the jet conduit 14 can be reduced. Since the inlet 38 is formed so that the surface normal vector N perpendicular to the flow path cross section is directed obliquely downward toward the downstream side, the cleaning water flows from the inlet 38 to the jet conduit 14. It can flow in smoothly. Therefore, it is possible to spout the vigorous wash water from the jet spout 34 into the bowl portion 10 in the predetermined water discharge direction E, and the wash water discharged from the jet spout 34 into the bowl portion 10 in the vertical direction. The flow D swirled in the (vertical direction) can be formed more effectively. Therefore, it is possible to form a flow that stirs in the vertical direction with respect to the water stored in the bowl portion 10, and it is possible to improve the discharge performance of filth and the like.

  In the flush toilet 1 according to the present embodiment described above, the wash-out flush toilet has been described as an example. However, the sewage inside the bowl portion is sucked into the bowl portion using a siphon action, and the drain trap pipe is connected to the outside at once. A so-called siphon flush toilet may be used.

1 Flush toilet 2 Toilet body 4 Toilet seat 6 Flash valve device (flash valve)
6a Human body sensor 8 Water supply pipe 10 Bowl part 12 Rim conduit (first waterway)
14 Jet waterway (second waterway)
16 Drainage trap line (trap line)
16a Drain trap pipe inlet 16b Drain trap pipe rise pipe 16c Drain trap pipe top 16d Drain trap pipe descend pipe 18 Soil receiving surface 20 Rim portion 20a Inner side surface 22 First shelf portion 24 Step portion 26 1 rim water outlet (first water discharge part)
28 Second rim spout (first spout)
30 Second shelf 30a Second shelf tip 32 Inner wall 34 Jet water spouting port (second water discharging unit)
36 Common waterway 38 Inlet of waterway for jet (inflow part of 2nd waterway)
40 Expansion section of jet conduit (second expansion section)
42 Restricted part of jet conduit (second throttle part)
44 Bent part of jet waterway (bent part of second waterway)
44a Overhang of bent part

Claims (6)

A flush toilet that flushes toilets with flush water supplied from a flush valve and discharges filth,
A bowl portion comprising a bowl-shaped waste receiving surface, and a rim portion located above the waste receiving surface;
A trap line that extends in communication with the bottom of the bowl and discharges dirt in the bowl and defines the initial water level of the bowl;
A first water discharger for forming a swirling flow for discharging cleaning water to the rim and swirling on the waste receiving surface;
The side surface of the bowl portion is formed at a position below the waste receiving surface and above the initial water level, and the cleaning water is discharged into the bowl portion so that the cleaning water in the bowl portion is vertically moved. A second water discharger forming a stirring flow;
A first water passage for supplying cleaning water to the first water discharger;
A second water passage for supplying cleaning water to the second water discharger,
The second water passage includes an inflow portion into which the wash water supplied from the flush valve flows, an expansion portion formed so that the flow path gradually increases from the inflow portion toward the downstream side, and the expansion portion And a throttle part formed in the vicinity of the second water discharge part so that the flow path gradually decreases from the downstream side to the downstream side. A flush toilet characterized in that it is set smaller than the cross-sectional area of the flow path other than the inflow portion and the throttle portion in the water channel. The channel cross-sectional area of the inlet portion and the diaphragm portion of the second water passage is flush toilet of claim 1, wherein a 500mm ² ~600mm ^2.   The second water channel is further formed downstream of the throttle unit and upstream of the second water discharge unit, so that the wash water that has passed through the throttle unit of the second water channel is directed to the second water discharge unit. The flush toilet according to claim 1 or 2, further comprising a bent portion formed by bending.   The bent portion includes a protruding portion formed so that the front wall surface in the flow channel protrudes substantially forward, and is bent from the upstream side of the protruding portion toward the second water discharge portion on the downstream side. The flush toilet according to claim 3 formed.   The bowl portion further includes a step portion that is formed closer to the center in the bowl portion than the filth receiving surface and is positioned below the initial water level, and the second water discharge portion is connected to the step portion. The flush toilet according to any one of claims 1 to 4, which is directed.   The flush toilet according to any one of claims 1 to 5, wherein the inflow portion of the second water passage is formed so that a cross section of the flow passage is directed obliquely downward toward the downstream side.

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