JP2003049475A - Flushing toilet stool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems such as reduction of sewage discharge ability due to reduction of a gap between an accumulated water level and a drain outlet when the drain outlet center position is lifted in a drain siphon type flushing toile stool on a floor. SOLUTION: A drain passage 8 is constructed of a drain passage upstream part 20, a drain passage downstream part 1, and the drain outlet 12. The drain passage upstream part 20 ranges from a drain passage inlet 21 to a drain passage downstream part lowermost end 11, an its inside diameter C1 is fixed substantially in the vicinity of the connection part with the drain passage downstream part 1. The drain passage downstream part 1 ranges from the drain passage downstream part lower most end 11 to the drain outlet 12, and a height A1 and a width B1 of the drain passage downstream part 1 in a N-N cross section are larger than the inside diameter C1. Therefore, a cross sectional area S1 is larger than a cross sectional area S20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-floor drainage siphon-type flush toilet provided with a drainage port above a floor surface and discharging dirt by a siphon action.

[0002]

2. Description of the Related Art Siphon-type toilets use a drop from the surface of the accumulated water to a drain to cause a siphon action to suck and discharge dirt in the accumulated water. Therefore, an underfloor drainage siphon-type flush toilet having a drainage port on the floor can take a large amount of the above-mentioned drop, so that the flushing function was stable. On the other hand, in a floor drainage siphon type flush toilet having a drainage port above the floor surface, the drop is unavoidably structurally small, so the suction force becomes small, and the drainage capacity is greatly affected. As a countermeasure against this, as shown in Japanese Patent Laid-Open No. 11-200459, a measure has been taken such as providing a throttle at the drainage port.

[0003]

Further, in the flush toilet having a drainage port above the floor surface, there is a demand from the market to raise the core position of the drainage port from the floor. This is because the drainage can be handled with a single lateral drainage pipe when performing the operations in parallel so that there is an advantage that the operation is simple. However, in the floor drain siphon type flush toilet, if the position of the drain outlet core is raised, the drop from the reservoir surface to the drain outlet is further reduced, and the energy itself that generates the siphon action is reduced, so the drainage power of the waste is reduced. There was a problem. JP-A-11-200459
In the measures to provide a throttle at the drain port as shown in Fig. 5, the siphon action duration was extended to discharge the filth, but there is a problem that the siphon action itself does not occur easily in a toilet bowl with a high drain port core position. there were. For this reason, there was a case where a measure was taken to supplement the energy corresponding to the drop reduction by supplying a large amount of cleaning water having a large flow rate per unit time from the jet discharge port. There was also a problem that the water discharge was large and the amount of water discharged was large, and it was difficult to save water.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a floor drain siphon-type flush toilet bowl having a high drain core position.

In order to achieve the above object, the first aspect of the present invention is characterized in that the cross sectional area of the drainage channel downstream portion is larger than that of the drainage channel upstream portion. Therefore, since there is no passage resistance due to the narrowing of the upstream part of the drainage channel, when the cleaning water passes through the upstream part of the drainage channel, the passage speed of the cleaning water sucked by the siphon action enters into the upstream part of the drainage channel. It does not decrease until it is discharged. In addition, it is necessary for air to enter through the drainage channel inlet or drainage port to end the siphon action, but when air enters through the drainage channel, the wash water that passes through the drainage channel upstream along with dirt is returned to the bowl side. There is a possibility that it will end up. In order to reliably discharge filth, it is necessary to let air enter through the drainage inlet, but as described above, if the wash water drain passage upstream passage speed is fast, the wash water has a strong force to flow to the drainage outlet. Air cannot enter through the drainage port, but always enters through the drainage channel entrance side. Therefore, according to the present invention, the cleaning water and the air always travel toward the drain port, and the stable cleaning function can be maintained.

According to a second aspect of the present invention, the cleaning water supply means is of a direct water pressure type. Therefore, it is possible to supply wash water with a high flow rate using the pressure of water from the jet discharge hole, so that it is possible to fill the drainage channel easily and discharge the dirt by siphoning regardless of the position of the drain outlet core. can do.

According to a third aspect of the present invention, the uppermost lower end of the drainage channel downstream portion is equivalent to or higher than the upper end of the drainage channel inlet which is the inlet of the drainage channel connected to the bowl portion. Characterize. Therefore, according to the present invention, the core position of the drain port can be raised.

According to a fourth aspect of the invention, the jet spout is made of a different material. Therefore, it becomes possible to process the jet discharge port with a high precision and an arbitrary structure. Therefore, according to the present invention, the jet discharge port can be manufactured to have an optimum structure.

According to a fifth aspect of the present invention, the water conduit is made of a different material. According to the present invention, the water conduit can be manufactured to have an optimum structure.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of a flush toilet 2 showing a first embodiment according to the present invention, and FIG. 2 is a drainage channel downstream portion 1 according to FIG.
2 is an enlarged schematic view of the periphery and a rear schematic view around the downstream portion 1 of the drainage channel (P view), FIG. 3 is a cross-sectional view taken along the line MM around the downstream portion 1 of the drainage channel associated with FIG. 2, and FIG. 4 is a drainage channel associated with FIG. The sectional view in NN of the downstream part 1 periphery is shown. The flush toilet 2 shown in FIG. 1 includes an opening / closing valve, and a water supply unit 5 that switches spouting water to the rim pipe 3 and the jet pipe 4, a control unit 6 that controls the switching, and a jet nozzle 7 connected to the jet pipe 4. The cross-sectional area S1 of the drainage downstream portion 1 is larger than the cross-sectional area S20 of the drainage upstream portion 20. 2, 3, and 4, the drainage channel 8 is composed of a drainage channel upstream portion 20, a drainage channel downstream portion 1, and a drainage port 12. The drainage canal upstream portion 20 extends from the drainage canal inlet 21 to the drainage canal downstream portion lower end 11 and the inner diameter C1 is almost constant in the vicinity of the drainage canal downstream portion 1. The drainage channel downstream portion 1 is from the drainage channel downstream portion lowest end 11 to the drainage port 12, and the height A1 and the width B1 of the drainage channel downstream portion 1 in the NN cross section are larger than the inner diameter C1. Therefore, the sectional area S1 is larger than the sectional area S20.

Here, the relationship between the height D1 from the floor surface 9 to the drainage channel inlet upper end 10 and the height H1 from the floor surface 9 to the drainage channel downstream end 11 which is the lowermost point on the drainage channel downstream side 1 upper side. Will be described. The height D1 is obtained by subtracting the initial water level F1 and the water sealing height G1 from the height E1 to the seat surface of the flush toilet 2. On the other hand, the height H1 is the height I1 to the drain core 13 which is the center of the drain 12, the difference J1 from the drain core 13 to the drain upper end 14 and the drain upper end 14 to the drain downstream. It can be obtained from the relationship of the difference K1 up to the lowest end 11. Generally E1 = 370mm, F1 = 130m
m, G1 = 60 mm, I1 = 170 mm, J1 = 35 m
m, and if K1 = 25 mm in consideration of passage of filth, D1 = 180 mm and H1 = 180 mm. Since the siphon toilet has a structure that emits suction force and discharges filth due to the difference in water level, at the start of cleaning, the water level at the time of water collection 15 during cleaning is higher than the water level at H1 which is the height of the lowermost end 11 of the drain outlet downstream part. Since the water level at the height G1 + D1 is high, a siphon action occurs. On the other hand, at the end of cleaning, air enters from either the lowermost end 11 of the downstream portion of the drainage port or the upper end 10 of the drainage channel inlet, thereby ending the siphon action. Therefore, the water level H1 at the lowermost end 11 of the downstream side of the drainage port just before the cleaning is completed and the upper end 10 of the drainage channel inlet.
Since the water level G1 is the same, the air may enter from the lowermost end 11 of the downstream portion of the drainage port. When air enters from the lowermost end 11 of the downstream portion of the drainage port, the cleaning water that has filled the upstream portion 20 of the drainage channel and the dirt that has moved together with the cleaning water return to the bowl side, which is extremely unsanitary. However, the air entering from the upper end 10 of the drainage inlet fills the drainage upstream portion 20 and pushes the wash water and the waste that have been moved to the downstream side 1 of the drainage outlet so that the waste hardly returns to the bowl side. It becomes hygienic. Here, the cross-sectional area S20
By making the cross-sectional area S1 larger and draining the water passing through the drainage upstream side 20 without resistance, the flow velocity passing through the drainage upstream side 20 is the drainage port after the wash water 16 enters the drainage inlet 21. Since it hardly decreases until it is discharged to the downstream part 1, the force flowing to the drainage port becomes strong, and the air cannot enter from the drainage port downstream end lowermost part 11 and must always enter from the drainage channel entrance upper end 10. become.

Therefore, according to the present invention, filth can be reliably discharged even if it is structurally disadvantageous to the siphon toilet.

It should be noted that as K1 becomes larger, H1 becomes smaller and D1 becomes larger than H1, which is an advantageous structure for a siphon toilet, but it becomes difficult to discharge filth in the downstream portion 1 of the drain port, and clogging occurs. Is more likely to occur. Therefore, K1 is preferably smaller than J1.

Next, the cleaning process will be described. The cleaning water 16 supplied from a pressurized water supply source (not shown) is controlled by the control unit 6, is opened by the water supply unit 5 to the rim pipe 3, and is discharged. After that, under the control of the control unit 6, the wash water 16 is switched to the jet pipe 4 by the water supply unit 5 and is jetted from the jet nozzle 7. Finally, the cleaning water 16 is controlled by the control unit 6, and the water supply unit 5 switches the discharge water to the rim pipe 3 to collect water on the bowl surface and then close the valve.

As described above, the wash water 16 is supplied under pressure and discharged from the jet nozzle 7 at a high flow rate, so that the high flow rate is maintained on the upstream side 20 of the drainage channel, which brings about a good result of the washing function. For this reason, it is suitable to set the cleaning water to be supplied under pressure.

Further, since the jet nozzle 7 is manufactured as a separate component with high precision, a sufficient flow velocity can be secured even with low flow rate water supply, and the cleaning performance can be maintained. It should be noted that at a small flow rate, the cleaning noise is reduced and water can be saved.

Here, the effect of saving water will be described. Although the control unit 6 determines the water discharge amount by controlling the time, the water discharge time varies due to control problems.
For example, if there is a variation of 1 second, the discharge amount per unit time will be about 1.6 L at a large discharge amount of about 100 L / MIN, but the discharge amount per unit time will be about 20 L / MIN. When the flow rate is small, the water discharge amount decreases to a variation of about 0.3L. If the variation can be suppressed, the set standard water volume for flushing the flush toilet can be set low, which is effective in saving water. For example, when the set wash water amount is 8 L, the wash water amount varies in the range of about 6.4 L to about 9.6 L in consideration of the variation of about 1.6 L due to the water discharge time at a large flow rate. If such variations occur, it may be difficult to discharge the filth at the minimum wash water volume of about 6.4 L, so the standard set flow rate is, for example, about 9.3 L (variation range: about 7.7 L to about 10.
9L) will need to be raised. On the other hand, if the same calculation is performed for a small flow rate, the variation range of the wash water amount when the standard set water amount is 8 L is 7.7 L to 8.3 L. Therefore,
If the flush toilet has a minimum flushing water volume of about 7.7 L and fulfills the flushing function, the standard set water volume at a large flow rate is 9.3 L and the standard set flow rate at a small flow rate is 8 L, and water can be saved at a small flow rate. I understand.

The pressurized water supply source here is a generic term for a water supply pressure (original pressure) that cannot be obtained with a toilet-mounted wash water storage tank having a head pressure of about 250 mm. Therefore, the pressurized water supply source of the present invention is capable of supplying washing water with a large head pressure compared to a toilet-mounted type such as a house roof or a building roof in addition to a pressurized water supply pipe such as a water pipe. Including things.

Next, a second embodiment will be described. FIG. 5 is a schematic view of the flush toilet 102 showing the second embodiment, FIG. 6 is an enlarged schematic view of the vicinity of the drainage downstream portion 101 according to FIG. 5, and a schematic rear view of the vicinity of the drainage downstream portion 101 (view from Q). 7, FIG. 7 is a cross-sectional view taken along line V-V of the vicinity of the downstream portion 101 of the drainage channel shown in FIG. 5, and FIG.
A sectional view at W is shown. Flush toilet 102 shown in FIG.
Is provided with an opening / closing valve 130, a pipe 131 connecting the flush toilet 102 to the opening / closing valve 130, and a pottery water conduit 135 that distributes cleaning water 134 to the rim hole 132 and the jet hole 133. It is characterized in that S101 is larger than the cross-sectional area S120 of the drainage channel upstream portion 120. 6, 7, and 8, the drainage channel 108 is composed of a drainage channel upstream portion 120, a drainage channel downstream portion 101, and a drainage port 112. The drainage channel upstream portion 120 extends from the drainage channel inlet 121 to the drainage channel downstream portion lowermost end 111, and the inner diameter C2 is substantially constant in the vicinity of the drainage channel downstream portion 101. The drainage channel downstream portion 101 is from the drainage channel downstream portion lowest end 111 to the drainage port 112, and the width B2 of the drainage channel downstream portion 101 in the WW cross section is larger than the inner diameter C2.
The height A2 is the same as the inner diameter C2. Therefore, the sectional area S101 is larger than the sectional area S120.

Here, from the floor surface 109 to the drainage channel inlet upper end 1
Height D2 up to 10 and floor 109 to drainage downstream 10
1. The relationship of the height H2 to the drainage channel downstream portion lowermost end 111 which is the uppermost lower end will be described. The height D2 is the height E2 to the seat surface of the flush toilet 102 minus the initial water level F2 and the water sealing height G2. On the other hand, the height H2 is the height I2 to the drain core 113 which is the center of the drain 112,
The difference J2 from the drain core 113 to the upper end 114 of the drain and the lowermost end 211 of the downstream of the drain from the upper end 114 of the drain.
Can be obtained from the relationship of the difference K2. here,
E2 = 370 mm, F2 = 130 mm, G2 = 60 m
m, I2 = 170 mm, J2 = 35 mm, A2 = C2 =
If it is 70 mm, K2 = 5 mm and D2 = 180
mm, H2 = 200 mm. The siphon toilet has a structure in which a suction force is generated by the height difference of the water level to discharge the filth, but the water level of the pool surface 15 at the time of cleaning is the upper end 1 of the drain inlet.
When it goes down to 0, D2 becomes lower than H2,
It becomes difficult to discharge dirt. However, by making the cross-sectional area S101 larger than the cross-sectional area S120, the drainage upstream side 12
Water passing through 0 can be discharged without resistance. Therefore, the flow velocity passing through the drainage channel upstream side 120 is
4 enters the drainage inlet 121, and then the drainage downstream 10
It hardly decreases until it is discharged to 1.

Therefore, according to the present invention, filth can be discharged even if the shape is structurally disadvantageous to the siphon toilet.

Next, the cleaning process will be described. The cleaning water 134 supplied from a pressurized water supply source (not shown) is supplied to the open / close valve 1
The valve is opened by 30, and water is discharged to the pottery water conduit 135.
Then, it passes through the jet chamber communication hole 140, flows into the jet chamber 141, and is discharged from the jet hole 133. Further, since the supplied cleaning water 134 has a large flow rate discharged from the jet hole 133 per unit time, the pottery water conduit 135 is quickly filled with water, and the cleaning water 1 is supplied to the rim hole 132.
34 is spouted. Then, the on-off valve 130 is closed, the water accumulated in the pottery water conduit 135 is supplied to the bowl surface, returns to the normal reservoir surface position 142, and the cleaning operation is completed.

In this way, the cleaning water 134 is supplied under pressure,
Since it is discharged from the jet hole 133 at a high flow rate, the high flow rate is maintained on the upstream side 120 of the drainage channel, which brings a good result to the washing function.

Further, since the pottery conduit 135 is used to fix the pipe 131 and the flush toilet 102, which are different materials, above the water level 142, there is an advantage that there is no risk of water leakage.

A nozzle made of a different material may be set in the jet hole 133.

Next, a third embodiment will be described. FIG. 9 is a schematic view of the flush toilet bowl 202 showing the third embodiment, FIG. 10 is an enlarged schematic view of the drainage downstream portion 201 and a rear schematic view of the drainage downstream portion 201 according to FIG. 9 (R view). FIG. 11 is a cross-sectional view taken along line X-X around the drainage channel downstream portion 201 relating to FIG. 9, and FIG. 12 is a cross-sectional view taken along line Y-Y around the drainage channel downstream portion 201 relating to FIG. The flush toilet 20 shown in FIG.
2 includes a tank 250 for storing the wash water 249, an opening / closing valve 251, and a pottery water conduit 235 for distributing the wash water 249 to the rim hole 232 and the jet hole 233, and the cross-sectional area S201 of the drainage channel downstream portion 201 is It is characterized in that it is larger than the sectional area S220 of the drainage channel upstream portion 220. Figure 10,
In FIGS. 11 and 12, the drainage channel 208 is composed of a drainage channel upstream portion 220, a drainage channel downstream portion 201, and a drainage port 212. The drainage upstream part 220 is the drainage inlet 221.
To the lowermost portion 211 of the drainage channel downstream portion, and the inner diameter C3 is almost constant in the vicinity of the drainage channel downstream portion 201. The drainage downstream part 201 is the lowermost end 211 of the drainage downstream part.
To the drainage port 212, the height A3 of the drainage channel downstream portion 201 in the WW cross section is larger than the inner diameter C3, and the width B is
3 has the same size as the inner diameter C3. Therefore, the sectional area S201 is larger than the sectional area S220.

Here, from the floor surface 209 to the upper end 2 of the drainage channel inlet.
Height D3 up to 10 and floor 209 to drainage downstream 20
1. The relationship of the height H3 to the drainage channel downstream portion lowermost end 211 which is the uppermost lower end will be described. The height D3 is the height E3 to the seat surface of the flush toilet 202 minus the initial water level F3 and the water sealing height G3. On the other hand, the height H3 is obtained by adding the height I3 to the drain port core 213 which is the center of the drain port 212 and the difference J3 from the drain port core 213 to the drain port upper end portion 214. Here, E3 = 370 mm, F3 = 1
00 mm, G3 = 55 mm, I3 = 120 mm, J3 =
35 mm, D3 = 215 mm, H3 = 155 m
m. Therefore, D3 is higher than H3, which is an advantageous condition for siphon generation. Cross-sectional area S
By making the cross-sectional area S201 larger than 220, the water passing through the drainage channel upstream side 220 can be discharged without resistance. Therefore, the flow velocity passing through the drainage channel upstream side 220 hardly decreases from the time when the wash water 249 enters the drainage channel inlet 221 to the time when it is discharged to the drainage channel downstream portion 201.

On the other hand, in the case of the tank-type cleaning system which is tightly connected to the toilet bowl, the head pressure is generally low, and the flow rate of the cleaning water 249 discharged from the jet hole 233 cannot be expected to be high. However, the use of the present invention together with an advantageous shape for siphon generation has the effect of stably discharging dirt.

Next, the cleaning process will be described. Tank 2
The wash water 249 stored in 50 is opened by the opening / closing valve 251 and discharged to the pottery water conduit 235. Then, it passes through the jet chamber communication hole 240, flows into the jet chamber 241, and is discharged from the jet hole 233. Further, since the supplied cleaning water 249 has a large flow rate discharged from the jet hole 233 per unit time, the pottery conduit 235 is quickly filled with water, and the cleaning water 249 is discharged to the rim hole 232. Then, the opening / closing valve 251 is closed, water is supplied to the bowl surface in order to return the accumulated water surface to the normal accumulated water surface position 242 through the overflow pipe 252, and the tank 2
The washing water 249 is stored in 50, and the washing operation is completed.

Even in the flush toilet 202 which supplies the flush water 249 having a low water head pressure as described above, by using the present invention together with the shape advantageous for siphon generation, it is possible to obtain a more stable function.

[Brief description of drawings]

FIG. 1 is a schematic view of a flush toilet showing a first embodiment according to the present invention.

FIG. 2 is an enlarged schematic view of the vicinity of the downstream portion 1 of the drainage channel according to FIG. 1 and a schematic rear view (view of P) around the downstream portion 1 of the drainage channel.

FIG. 3 is at MM in the vicinity of the downstream portion 1 of the drainage canal in relation to FIG.

FIG. 4 is a cross-sectional view taken along the line N-N around the drainage channel downstream portion 1 relating to FIG. 2;

FIG. 5 is a schematic view of a flush toilet bowl showing a second embodiment.

FIG. 6 is an enlarged schematic view of the vicinity of the downstream portion of the drainage channel 101 according to FIG. 5 and a schematic rear view of the vicinity of the downstream portion of the drainage channel 101 (view from Q).

FIG. 7 is a V-V around the downstream portion 101 of the drainage canal shown in FIG.
FIG.

FIG. 8 is a WW around the downstream portion 101 of the drainage canal shown in FIG.
FIG.

FIG. 9 is a schematic view of a flush toilet 202 showing a third embodiment.

10 is an enlarged schematic view of the vicinity of the drainage channel downstream portion 201 and a schematic rear view of the vicinity of the drainage channel downstream portion 201 according to FIG. 9 (viewed from R).

FIG. 11 is an X- around the drainage downstream portion 201 related to FIG. 9;
It is sectional drawing in X.

FIG. 12 is a Y- around the drainage downstream portion 201 related to FIG.
It is sectional drawing in Y.

[Explanation of symbols]

1, 101, 210 ... Drainage channel downstream part 2, 102, 202 ... Flush toilet 3 ... Rim pipe 4 ... Jet pipe 5 ... Water supply part 6 ... Control part 7 ... Jet nozzle 8, 108, 208 ... Drainage channel 9, 109, 209 ... Floor 10, 110, 210 ... Drainage channel inlet upper end 11, 111, 211 ... Drainage channel downstream end lowermost 12, 112, 212 ... Drainage port 13, 113, 213 ... Drainage port core 14, 114, 214 ... Drainage port Upper end portion 15 ... Water surface during cleaning 16, 134, 249 ... Wash water 20, 120, 220 ... Drain passage upstream portion 21, 121, 221 ... Drain passage inlet 130, 251 ... Open / close valve 131 ... Pipe 132, 232 ... Rim hole 133, 233 ... Jet holes 135, 235 ... Ceramics water conduit 140 ... Jet chamber connecting hole 141 ... Jet chambers 142, 242 ... Water surface position 250 ... Tank 252 ... Over Flow pipes S1, S101, S201 ... Cross-sectional area S20, S120, S220 of the drainage channel downstream part Cross-sectional area A1, A2, A3 of the drainage channel upstream part ... Heights B1, B2, B3 ... of the drainage channel downstream part Widths C1, C2, C3 ... Inner diameters D1, D1, D2 at the lowermost end of the downstream of the drainage channel ... Heights E1, E2, E3 from the floor surface 9 to the upper end of the drainage channel ... Seating surface of the flush toilet 2 Height F1, F2, F3 ... Initial water level G1, G2, G3 ... Water sealing height H1, H2, H3 ... Height from floor surface 9 to drainage channel downstream end 1 which is the lowermost end of drainage channel downstream part 1 upper side I1, I2, I3 ... The drain core 1 which is the center of the drain 12.
Heights up to 3 J1, J2, J3 ... Drain outlet core 113 to drain outlet upper end 1
Differences up to 14 K1, K2, K3 ... Differences from the drain port upper end 14 to the drainage channel lowermost end 11

Claims (5)

[Claims] 1. A flush water supply means for supplying flush water to a toilet bowl, a bowl portion for accumulating accumulated water, a drainage channel through which the flushing water passes, a jet outlet facing the drainage channel, and the flushing water. A water conduit that connects the supply means and the jet outlet, and a drainage port that is located at the most downstream of the drainage channel and that is connected to an external drainage pipe are provided, and the drainage port is above the floor surface where the toilet bowl is installed. In the flush toilet located, the cross-sectional area of the drainage downstream portion which is a horizontal portion of the drainage adjacent to the drainage outlet is located upstream of the drainage downstream in the drainage upstream. A flush toilet characterized by having a larger cross-sectional area than the portion connected to the downstream portion. 2. The flush toilet according to claim 1, wherein the flush water supply means is a direct pressure type of tap water. 3. In the toilet bowl, as compared with an upper end of a drainage channel inlet which is an inlet of the drainage channel connected to the bowl portion,
Whether the uppermost lower end of the drainage channel downstream portion is equivalently located,
Alternatively, the flush toilet bowl according to any one of claims 1 to 2, wherein the flush toilet bowl is located above the flush toilet bowl. 4. The flush toilet bowl according to claim 1, wherein the jet water outlet is made of a different material. 5. The flush toilet bowl according to claim 1, wherein the water conduit is made of a different material.