Flush toilet

Abstract

To provide a water closet for improving the dirt discharge performance.SOLUTION: The water closet in the embodiment includes a bowl part, a rim part, a water discharge port, and a water reservoir part, the bowl part serving for receiving dirt, the rim part being formed on an upper part of the bowl part, the water discharge port serving for discharging washing water, the water reservoir part being formed on a lower part of the bowl part, the water reservoir part being formed with a first region to which a drain path is connected, and a second region which is located in front of the first region. A main stream of the washing water discharged from the water discharge port along the rim part swirls around the bowl part and flows into the first region.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The disclosed embodiments relate to a flush toilet. [Background technology]

[0002] 2. Description of the Related Art Flush toilets are known in the art in which a main stream of flush water swirling along the rim flows from the front of the bowl into the pool portion (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5553188 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned flush toilet, if the front-to-rear length of the bowl section is shortened in order to make the flush toilet smaller, the flow rate of the flush water will increase, and it will not flow into the water storage section from the front of the bowl section, which could reduce the dischargeability of waste.

[0005] An object of one aspect of the embodiment is to provide a flush toilet that improves waste discharge properties. [Means for solving the problem]

[0006] A flush toilet according to one aspect of the embodiment comprises a bowl portion, a rim portion, a spout, and a water collection portion. The bowl portion receives waste. The rim portion is formed in an upper portion of the bowl portion. The spout spouts flush water. The water collection portion is formed in a lower portion of the bowl portion. The water collection portion is formed with a first area to which the drainage channel is connected, and a second area located forward of the first area. A main flow of flush water spouted from the spout along the rim portion swirls around the bowl portion and flows into the first area.

[0007] As a result, the flush toilet causes the main flow of flush water, which has a strong swirling force, to flow into the first area, where it agitates the waste and pushes it into the drainage channel, thereby discharging the waste.As a result, the flush toilet can improve the dischargeability of waste.

[0008] The water outlet comprises a first water outlet that spouts the flushing water along the rim portion, and a second water outlet that is provided at a location different from the first water outlet and spouts the flushing water, and the main flow of the flushing water spouted from the first water outlet flows into the first area, and the flushing water spouted from the second water outlet flows into the second area.

[0009] As a result, in the first area, the flush toilet agitates the waste with the main flow of flush water spouted from the first outlet, and in the second area, the waste is agitated with flush water spouted from the second outlet. As a result, the flush toilet can improve the agitation of the waste and improve the dischargeability of the waste. Also, when discharging waste, the flush toilet can push the waste into the discharge path with flush water flowing from the second area into the first area, and discharge the waste from the discharge path. As a result, the flush toilet can improve the dischargeability of the waste.

[0010] The present invention is also characterized in that a first swirling flow is formed in the first region, and a second swirling flow different from the first swirling flow is formed in the second region.

[0011] As a result, the flush toilet creates a swirling flow in each area, and agitates the waste with each swirling flow. Therefore, the flush toilet can improve the agitation of waste and improve the dischargeability of waste, compared to, for example, a case in which waste is agitated by one large swirling flow in the water collection section. Furthermore, the flush toilet can agitate waste with the first swirling flow and the second swirling flow near the boundary between the first area and the second area. Therefore, the flush toilet can improve the agitation of waste and improve the dischargeability of waste.

[0012] It is also characterized in that a portion of the flush water discharged from the first water outlet branches off from the main flow, merges with the flush water discharged from the second water outlet, and flows into the second area.

[0013] As a result, the flush toilet merges the flush water discharged from the first outlet and the flush water discharged from the second outlet, forming a second swirling flow in the second area with flush water that has great momentum. As a result, the flush toilet can increase the momentum of the second swirling flow in the second area, improving the agitation of waste in the second area and improving the dischargeability of waste. Additionally, when discharging waste, the flush toilet can cause the second swirling flow with great momentum to flow from the second area into the first area, pushing the waste into the discharge passage. As a result, the flush toilet can improve the dischargeability of waste. Effect of the Invention

[0014] According to one aspect of the embodiment, it is possible to improve the dischargeability of waste. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a left side view of a flush toilet according to an embodiment. [Diagram 2] FIG. 2 is a plan view of the toilet body according to the embodiment. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III of FIG. [Figure 4] FIG. 4 is a cross-sectional view of the toilet body taken along the line IV-IV in FIG. [Diagram 5] FIG. 5 is a cross-sectional view taken along line VV of FIG. [Figure 6] 6 is a cross-sectional view of the water storage portion taken along the line VI-VI in FIG. [Figure 7] 7 is a cross-sectional view of the water storage portion taken along the line VII-VII in FIG. [Figure 8] FIG. 8 is a diagram in which the surface shapes of the first guide portion and the second guide portion in the cross sections shown in A to G in FIG. 4 are overlapped. [Figure 9] FIG. 9 is a diagram for explaining the flows of the first flush water and the second flush water in the bowl portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Below, an embodiment of a flush toilet disclosed in this application will be described in detail with reference to the attached drawings. Note that the invention is not limited to the embodiment shown below. It should be noted that the drawings are schematic, and the dimensional relationships of each element, the ratios of each element, and the like may differ from reality. There may also be parts in which the dimensional relationships and ratios differ between the drawings.

[0017] <Overall configuration of a flush toilet> First, the overall structure of a flush toilet 1 according to an embodiment will be explained with reference to Figure 1. Figure 1 is a left side view of a flush toilet 1 according to an embodiment. Figure 1 also shows a wall surface 8 and a floor surface 9 in cross section.

[0018] For ease of explanation, FIG. 1 also illustrates a three-dimensional Cartesian coordinate system including a Z-axis with the positive direction being the vertical upward direction. Such Cartesian coordinate systems may also be illustrated in other figures. In such Cartesian coordinate systems, the negative direction of the Y-axis is defined as the forward direction, the positive direction of the Y-axis as the backward direction, the positive direction of the X-axis as the rightward direction, and the negative direction of the X-axis as the leftward direction. For this reason, in the following explanation, the X-axis direction may be referred to as the left-right direction, the Y-axis direction as the front-back direction, and the Z-axis direction as the up-down direction.

[0019] Furthermore, the flush toilet 1 according to this embodiment is a so-called wall-hung type flush toilet that is attached to a wall surface 8. However, the flush toilet may also be a so-called floor-standing type flush toilet that is installed on a floor surface 9.

[0020] The flush toilet 1 comprises a toilet body 2 and a genital cleaning device 3. The flush toilet 1 according to this embodiment is a wash-down toilet, which flushes the toilet body 2 with flush water supplied from a flush water source to expel waste. The toilet body 2 is made of ceramic, for example. Details of the toilet body 2 will be described later.

[0021] The private parts washing device 3 is equipped with a washing nozzle, a nozzle driving motor, a motor control device (none of which are shown), etc. The private parts washing device 3 is provided on the upper part of the toilet body 2 for washing the private parts of the user, and washes the private parts of the user with washing water sprayed from the washing nozzle.

[0022] In the flush toilet 1, flush water is supplied to the toilet body 2 via a water supply pipe 4a connected to a water tank 4. The flush toilet 1 also discharges waste together with flush water into a drain pipe 5. The water tank 4 may also be placed behind the toilet body 2, with flush water supplied directly from the water tank 4 to the toilet body 2.

[0023] The flush toilet 1 also includes a water supply hose 6a that supplies wash water to the private parts washing device 3 for private parts washing, and a power cable 6b that supplies power to the private parts washing device 3.

[0024] <Toilet bowl body> Next, the toilet body 2 according to the embodiment will be described with reference to Figs. 2 to 5. Fig. 2 is a plan view of the toilet body 2 according to the embodiment. Fig. 3 is a cross-sectional view taken along III-III in Fig. 2. Fig. 4 is a cross-sectional view of the toilet body 2 taken along IV-IV in Fig. 3. Fig. 5 is a cross-sectional view taken along VV in Fig. 2.

[0025] The toilet body 2 comprises a bowl section 10, a rim section 11, a first water outlet 12 (water outlet), a second water outlet 13 (water outlet), and a water collection section 14. The toilet body 2 spouts flushing water from the first water outlet 12 formed on the left and the second water outlet 13 formed on the right, respectively, to discharge waste. Below, the flushing water spouted from the first water outlet 12 may be referred to as "first flushing water," and the flushing water spouted from the second water outlet 13 may be referred to as "second flushing water."

[0026] The bowl portion 10 is formed in a bowl shape and receives waste. The bowl portion 10 includes a first guide portion 20 and a second guide portion 21 (a rotating portion). The first guide portion 20 and the second guide portion 21 will be described in detail later.

[0027] The rim portion 11 is provided on the upper part of the bowl portion 10. The rim portion 11 includes a side wall portion 11a extending upward from the upper end of the bowl portion 10, and an upper wall portion 11b extending from the upper end of the side wall portion 11a toward the inside of the bowl portion 10. The side wall portion 11a and the upper wall portion 11b are formed along the periphery of the bowl portion 10. The rim portion 11 is formed in an overhanging shape to prevent the first flush water from splashing out.

[0028] In the toilet body 2, the rim portion 11 and the bowl portion 10 form a water passage 15 through which the main flow of the first flush water discharged from the first water outlet 12 flows. Specifically, the water passage 15 is formed by the side wall portion 11a and the top wall portion 11b of the rim portion 11, and a part of the second guide portion 21 of the bowl portion 10 (hereinafter referred to as the "bottom wall 21a"). The bottom wall 21a of the water passage 15 may be formed by the rim portion 11. The water passage 15 is formed so as to swirl the main flow of the first flush water discharged from the first water outlet 12 to the rear of the bowl portion 10.

[0029] In this specification, the term "main stream" refers to the flow of flush water discharged from the water discharge port into the bowl portion 10 that has a strong water force within the bowl portion 10. In addition, "strong water force" refers to the magnitude of the flow rate or the flow velocity being greater within the bowl portion 10.

[0030] Water passage 15 is formed so as to slope upward from first water outlet 12 toward the front end of bowl section 10. Specifically, in water passage 15, bottom wall 21a is formed so that its height increases from first water outlet 12 toward the front end of bowl section 10. Bottom wall 21a is formed so that its height increases continuously from first water outlet 12 toward the front end of bowl section 10. In addition, the vertical length of side wall 11a is configured to decrease toward the front end of bowl section 10.

[0031] The end of the bottom wall 21a on the first water outlet 12 side is provided below the first water outlet 12. The end of the bottom wall 21a expands the water outlet area from which the first flush water is discharged. Below, the end of the bottom wall 21a located below the first water outlet 12 may be referred to as the "area expansion section 21b (expansion section)."

[0032] Further, the area enlargement portion 21b is formed so that the rim portion 11 side, specifically, the water collecting portion 14 side is lower than the side wall portion 11a side of the rim portion 11.

[0033] Furthermore, a protrusion 11c is formed in the rim portion 11 in front of the second water outlet 13. The protrusion 11c protrudes toward the inside of the bowl portion 10 so as to block the water passage 15. The protrusion 11c changes the direction of the main flow of the first flush water, causing the main flow of the first flush water to flow into the reservoir portion 14.

[0034] The first water outlet 12 is formed in the upper part of the bowl portion 10 on the left rear side. The first water outlet 12 outlets the first flush water, which is supplied via a first water conduit 16a branching off from a common water conduit 16, along the rim portion 11. The common water conduit 16 is connected to a water supply pipe 4a (see FIG. 1), and flush water is supplied via the water supply pipe 4a. The first water outlet 12 outlets the first flush water from the rear to the front along the rim portion 11.

[0035] The second water outlet 13 is formed in an upper part of the bowl portion 10 on the rear right side. The second water outlet 13 discharges the second flush water, which is supplied via a second water conduit 16b branching off from the common water conduit 16, into the bowl portion 10.

[0036] The second water outlet 13 spouts the second flush water along a rear wall portion 22 formed at the rear end of the bowl portion 10. The second water outlet 13 spouts the flush water from right to left. The rear wall portion 22 is formed so as to be recessed toward the rear side, and causes the second flush water spouted from the second water outlet 13 to swirl.

[0037] <Reservoir section> Next, the water storage section 14 will be described with reference to Fig. 3, Fig. 6, and Fig. 7. Fig. 6 is a cross-sectional view of the water storage section 14 taken along the line VI-VI in Fig. 3. Fig. 7 is a cross-sectional view of the water storage section 14 taken along the line VII-VII in Fig. 3.

[0038] The pooling section 14 is provided below the bowl section 10. The pooling section 14 stores a portion of the flush water as pooled water. A drain passage 17 is connected to the pooling section 14, and waste is discharged into the drain passage 17 together with the flush water. The drain passage 17 is connected to the drain pipe 5 (see FIG. 1). The pooling section 14 is formed so that the height of its front end is the lowest.

[0039] The water collecting section 14 includes a front surface 30, a rear surface 31, a pair of side surfaces 32, and a bottom surface 33. The front surface 30 is curved so as to protrude forward. The rear surface 31 is curved so as to protrude backward. The bottom surface 33 is connected to the discharge passage 17.

[0040] The pair of side surface portions 32 are formed so that the distance between their rear ends is longer than the distance between their front ends, and so that they spread from the front to the rear. That is, the water pooling portion 14 is formed so that the rear side is larger than the front side in a plan view.

[0041] A pair of side surface portions 32 are formed with convex surfaces 32a that protrude toward the opposing side surface portion 32. The convex surfaces 32a are formed by curving the side surface portion 32 so that the entire side surface portion 32 protrudes toward the other side surface portion 32. The convex surfaces 32a may be formed by curving a portion of the side surface portion 32 so that the portion protrudes toward the other side surface portion 32. The convex surfaces 32a are formed along the up-down direction. The lower end of the convex surfaces 32a is located above the bottom surface portion 33. In other words, the convex surfaces 32a are not connected to the bottom surface portion 33, and a gap is formed between the convex surfaces 32a and the bottom surface portion 33. The lower end of the convex surfaces 32a may be formed up to the bottom surface portion 33.

[0042] The front surface portion 30 and the pair of side surface portions 32 are connected by curved surfaces. The rear surface portion 31 and the pair of side surface portions 32 are also connected by curved surfaces.

[0043] The water pooling section 14 is formed with a first region 100 which is an upper region of the discharge passage 17, and a second region 101 which is an area in front of the first region 100. The first region 100 and the second region 101 are partitioned by the apex of the convex surface 32a in a plan view. The water pooling section 14 on the rear side of the apex of the convex surface 32a is the first region 100, and the water pooling section 14 on the front side of the apex of the convex surface 32a is the second region 101. The convex surface 32a is formed across the first region 100 and the second region 101.

[0044] The first region 100 is formed with a lower region 100a on the discharge passage 17 side and an upper region 100b above the lower region 100a. The water reservoir 14 is formed so that the change in flow speed of the swirling flow is greater in the upper region 100b than in the lower region 100a. Specifically, the curvature of the curved surface forming the upper region 100b is greater than the curvature of the curved surface forming the lower region 100a.

[0045] For example, in the curved surface connecting the rear surface portion 31 and the side surface portion 32, the curvature of the curved surface forming the upper region 100b is greater than the curvature of the curved surface forming the lower region 100a. The curvature of the rear surface portion 31 forming the upper region 100b may be greater than the curvature of the rear surface portion 31 forming the lower region 100a.

[0046] In addition, in the transition region from the upper region 100b to the lower region 100a, the curvature of the curved surface is formed to change continuously.

[0047] Moreover, the first region 100 is formed to generate a swirling flow having a larger swirling radius than the second region 101. Specifically, the cross-sectional area of ​​the first region 100 in the horizontal direction is larger than the cross-sectional area of ​​the second region 101 in the horizontal direction.

[0048] Moreover, the first region 100 and the second region 101 are formed so that swirling flows with different flow velocities are generated in the upper region 100b and the second region 101. Specifically, the curvature of the curved surface forming the upper region 100b is different from the curvature of the curved surface forming the second region 101. For example, the curvature of the rear surface portion 31 forming the upper region 100b is different from the curvature of the front surface portion 30 forming the second region 101. Moreover, the curvature of the curved surface connecting the rear surface portion 31 and the side surface portion 32 forming the upper region 100b is different from the curvature of the front surface portion 30 forming the second region 101.

[0049] Moreover, the first region 100 and the second region 101 are formed so that a swirling flow with a smaller flow velocity is generated in the lower region 100a than in the second region 101. Specifically, the curvature of the curved surface forming the lower region 100a is smaller than the curvature of the curved surface forming the second region 101. For example, the curvature of the rear surface portion 31 forming the lower region 100a is smaller than the curvature of the front surface portion 30 forming the second region 101.

[0050] <First guide section and second guide section> Next, the first guide portion 20 and the second guide portion 21 will be described with reference to Fig. 3, Fig. 4, and Fig. 8. Fig. 8 is a diagram in which the surface shapes of the first guide portion 20 and the second guide portion 21 in the cross sections shown in A to G of Fig. 4 are superimposed. A to G of Fig. 8 correspond to the surface shapes of the first guide portion 20 and the second guide portion 21 in the cross sections shown in A to G of Fig. 4.

[0051] The first guide portion 20 is formed on the upper part of the water collecting portion 14. The second guide portion 21 is formed on the upper part of the first guide portion 20. The second guide portion 21 is formed between the first guide portion 20 and the rim portion 11. The first guide portion 20 and the second guide portion 21 are connected by a ridge portion 23 formed by a curved surface. In addition, the ridge portion 23 is the apex of the curved surface where the first guide portion 20 and the second guide portion 21 are connected.

[0052] First guide portion 20 is formed so as to widen from the front to the rear of bowl portion 10. Specifically, first guide portion 20 is formed so that the upper end of first guide portion 20 is positioned outward in the left-right direction from the front to the rear of bowl portion 10. That is, ridge portion 23 is formed so as to widen from the front to the rear of bowl portion 10. In other words, the distance of ridge portion 23 from center line O of bowl portion 10 in the left-right direction increases from the front to the rear.

[0053] Furthermore, the length of first guide portion 20 from the upper end of water collecting portion 14 to the upper end of first guide portion 20 increases toward the front of bowl portion 10. Specifically, the surface length of first guide portion 20 from the upper end of water collecting portion 14 to the upper end of first guide portion 20 increases toward the front of bowl portion 10.

[0054] The first guide portion 20 is asymmetric with respect to the center line O of the bowl portion 10 in the left-right direction. In the following, the first guide portion 20 on the left side of the center line O may be referred to as the "first guide portion 20a," and the first guide portion 20 on the right side of the center line in the left-right direction of the bowl portion 10 may be referred to as the "first guide portion 20b." In other words, the first guide portion 20 on the first water outlet 12 side may be referred to as the "first guide portion 20a," and the first guide portion 20 on the second water outlet 13 side may be referred to as the "first guide portion 20b."

[0055] The first guide portion 20a is formed from behind the first water outlet 12 to the front end of the bowl portion 10. The first guide portion 20 is formed to allow the first flush water and the second flush water flowing downward from the area enlargement portion 21b to flow into the first area 100.

[0056] The first guide portion 20a is formed so that the inclination increases from the rear to the front. Specifically, the first guide portion 20a is formed so that the inclination increases from the vicinity of the first water outlet 12 to the vicinity of the second region 101 of the water storage portion 14 in the front-rear direction as shown in Fig. 4 and A to C in Fig. 8. The first guide portion 20a may be formed so that the inclination increases from the vicinity of the first water outlet 12 to the vicinity of the front end of the second region 101 as the inclination increases from the rear to the front. The inclination is an angle from the floor surface 9 (see Fig. 1). Therefore, the closer the first guide portion 20 is to vertical, the greater the inclination.

[0057] Moreover, the first guide portion 20a is formed so that the inclination becomes smaller from the vicinity of the front end of the water collecting portion 14 toward the front.

[0058] First guide portion 20b is formed from below protruding portion 11c to the front end of bowl portion 10. First guide portion 20b is formed so that the first flush water that flows into first guide portion 20 (including first guide portion 20a and first guide portion 20b) forward of water collection portion 14 turns around to first region 100 and flows into first region 100.

[0059] In addition, the first guide portion 20 is configured so that the ridge portion 23 prevents the first cleaning water that flows into the first guide portion 20 forward of the water storage portion 14 from flowing into the second guide portion 21 above the first guide portion 20b.

[0060] Moreover, the first guide portion 20b is formed so that the inclination increases from the front to the rear as shown in Fig. 4 and Fig. 8A to 8G. That is, the inclination of the first guide portion 20b is small in the front.

[0061] In addition, the first guide section 20 forward of the water collection section 14 is formed so that the curvature of the curved surface forming the first guide section 20, specifically the curved surface forming the bottom of the first guide section 20, increases from the front to the rear, as shown in Figures 4 and 8F to G.

[0062] The second guide portion 21 has a smaller inclination than the first guide portion 20. The second guide portion 21 prevents the first flush water from flowing out of the water passage 15 in the water passage 15 forward of the area enlargement portion 21b.

[0063] The right ridge portion 23 terminates rearward of the midpoint in the front-to-rear direction of the water pooling section 14. The left ridge portion 23 has a starting point rearward of the first water outlet 12. The curvature of the ridge portion 23 increases from the front to the rear.

[0064] <Flow of cleaning water> Next, the flow of flush water in the bowl portion 10 will be described with reference to Fig. 9. Fig. 9 is a diagram for explaining the flow of the first flush water and the second flush water in the bowl portion 10. In Fig. 9, the flow of the first flush water is indicated by a solid line, and the flow of the second flush water is indicated by a dashed line. Note that the flush water shown in Fig. 9 has a certain water force, unlike flush water that simply flows down the bowl portion 10.

[0065] The main flow of the first flush water discharged from the first water outlet 12 swirls in the water passage 15. Specifically, the main flow of the first flush water flows forward from the first water outlet 12 through the water passage 15, and its direction is changed to the rear at the front end of the water passage 15, or forward of the water pooling section 14. The main flow of the first flush water flowing rearward has its direction changed by the protruding portion 11c, and flows into the first region 100 of the water pooling section 14. Specifically, the main flow of the first flush water flows into the first region 100 from the rear and left.

[0066] Water passage 15 is formed so that bottom wall 21a increases in height from first water outlet 12 toward the front end of bowl portion 10. This reduces the kinetic energy of the main flow of the first flush water, adjusting the swirling force of the main flow of the first flush water and preventing the main flow of the first flush water from swirling too much. This prevents the first flush water from climbing up rim portion 11 and overflowing.

[0067] Also, immediately after being discharged from the first water outlet 12, a portion of the first flush water branches off from the area enlargement section 21b into the first guide section 20a and flows along the first guide section 20a into the second area 101. The inclination of the first guide section 20a increases toward the front. Therefore, the branched first flush water does not flow into the first guide section 20, which is in front of the water pool section 14, but flows into the second area 101 from the left.

[0068] In addition, because the water passage 15 is formed to have an upward incline, a portion of the first flush water deviates from the main flow of the first flush water into the second guide section 21 while flowing through the water passage 15 forward of the area enlargement section 21b. This first flush water that deviates from the second guide section 21 flows into the first guide section 20 forward of the pooling section 14.

[0069] The first guide section 20 in front of the water pooling section 14 is formed so that the curvature of the curved surface forming the first guide section 20 increases from the front to the rear. Therefore, of the first flush water that flows into the first guide section 20 in front of the water pooling section 14, the first flush water that flows into the water pooling section 14 side has its flow direction abruptly changed by the first guide section 20 with its large curvature, and swirls rearward along the first guide section 20b. Therefore, of the first flush water that flows into the first guide section 20 in front of the water pooling section 14, the first flush water that flows into the water pooling section 14 side is prevented from flowing into the second region 101, swirls around the first guide section 20b, and flows into the first region 100 from the right.

[0070] Furthermore, of the first flush water that flows into the first guide section 20 forward of the pooling section 14, the first flush water that flows into the front side swirls around the first guide section 20 significantly. Of the first flush water that flows into the first guide section 20 forward of the pooling section 14, the first flush water that flows into the front side swirls around the long first guide section 20, reducing the kinetic energy and preventing it from flowing into the second guide section 21 and the water passage 15. Furthermore, the flush water that swirls around the first guide section 20 is prevented from riding up onto the second guide section 21 by the ridge section 23. That is, the first flush water that once deviates from the main flow of the first flush water is prevented from rejoining the main flow of the first flush water.

[0071] The first flush water that has deviated from the main flow of the first flush water may flow in a direction significantly different from that of the main flow of the first flush water, and when such first flush water joins the main flow of the first flush water, the momentum of the main flow of the first flush water may decrease, causing the main flow of the first flush water to swirl insufficiently. The first guide portion 20 can suppress the occurrence of insufficient swirl of the main flow of the first flush water.

[0072] Furthermore, of the first flush water that flows into the first guide section 20 forward of the pooling section 14, the first flush water that flows into the front side gains greater kinetic energy as it flows down while swirling. Of the first flush water that flows into the first guide section 20 forward of the pooling section 14, the first flush water that flows into the front side is prevented from flowing into the second region 101, swirls around the first guide section 20b, and flows into the first region 100 from the right.

[0073] After swirling along the rear wall portion 22, the second flush water flows along the first guide portion 20a and flows into the second area 101. The second flush water also branches immediately after being discharged from the second water outlet 13 or while swirling along the rear wall portion 22, and flows into the first area 100.

[0074] As described above, the main flow of the first washing water and the first washing water deviated from the main flow of the first washing water flow into the first region 100, and a portion of the first washing water flows into the second region 101. In addition, the second washing water flows into the first region 100 and the second region 101.

[0075] The wash water flowing into the first area 100 and the second area 101 forms a first swirling flow in the first area 100, and forms a second swirling flow in the second area 101 that is different from the first swirling flow.

[0076] Next, the first swirling flow and the second swirling flow will be described with reference to FIG. 6 and FIG.

[0077] As shown in Fig. 6, a pair of side sections 32 of the water pool section 14 are each formed with a convex surface 32a. Therefore, the flush water that flows into the water pool section 14 while swirling in the bowl section 10 forms a flow along the wall surfaces (front surface section 30, rear surface section 31, side surface section 32) that constitute the water pool section 14 in a plan view, but becomes a flow separated from the wall surfaces by the convex surface 32a, forming a first swirling flow in a first region 100 behind the apex of the convex surface 32a, and forming a second swirling flow in a second region 101 in front of the apex of the convex surface 32a.

[0078] The convex surface 32a is formed along the vertical direction, so that a first swirling flow is formed in the entire first region 100, and a second swirling flow is formed in the entire second region 101.

[0079] In the first region 100, the waste is agitated by the first swirling flow. In the second region 101, the waste is agitated by the second swirling flow. As a result, different swirling components of the first swirling flow and the second swirling flow are generated in the water pooling section 14 in the plan view direction, and the waste agitation performance can be improved in the water pooling section 14 as a whole.

[0080] Furthermore, when waste is discharged from the water storage section 14 to the discharge passage 17, the first swirling flow pushes the waste into the discharge passage 17 and the waste is discharged from the discharge passage 17. Furthermore, when waste is discharged from the water storage section 14 to the discharge passage 17, the second swirling flow flows into the first region 100, and the second swirling flow pushes the waste into the discharge passage 17 and the waste is discharged from the discharge passage 17.

[0081] Moreover, the cross-sectional area of ​​the first region 100 in the horizontal direction is larger than the cross-sectional area of ​​the second region 101 in the horizontal direction.

[0082] As a result, a first swirling flow with a large swirling radius is formed in the first region 100, and a second swirling flow with a smaller swirling radius than the first swirling flow is formed in the second region 101. Therefore, in the second region 101, the waste is easily agitated by the small swirling flow, and in the first region 100, the waste is easily discharged because the large swirling flow flows smoothly in the discharge passage 17.

[0083] In addition, the curvature of the curved surface forming the first region 100 is different from the curvature of the curved surface forming the second region 101. Specifically, the curvature of the curved surface forming the upper region 100b of the first region 100 is different from the curvature of the curved surface forming the second region 101.

[0084] As a result, swirling flows with different flow velocities are formed in the upper region 100b and the second region 101.

[0085] In addition, the curvature of the curved surface forming the upper region 100b is different from the curvature of the curved surface forming the lower region 100a in the first region 100. Specifically, the curvature of the curved surface forming the upper region 100b is greater than the curvature of the curved surface forming the lower region 100a.

[0086] As a result, in the upper region 100b, the curvature of the curved surface forming the upper region 100b is large, so the change in flow rate of the first swirling flow is large, and the waste is agitated. Meanwhile, in the lower region 100a, the curvature of the curved surface forming the lower region 100a is small, so the change in flow rate of the first swirling flow is small, so the flow of the first swirling flow becomes smooth, and the waste is easily discharged into the discharge passage 17. That is, in the first region 100, the upper region 100b in which the first swirling flow that mainly agitates the waste is formed, and the lower region 100a in which the first swirling flow that mainly discharges the waste are formed are formed.

[0087] <Effects> Next, the effects of the flush toilet 1 according to this embodiment will be explained.

[0088] Flush toilet 1 comprises a bowl portion 10, a rim portion 11, a first water outlet 12, and a water collection portion 14. Bowl portion 10 receives waste. Rim portion 11 is formed in the upper portion of bowl portion 10. First water outlet 12 discharges first flush water. Water collection portion 14 is formed in the lower portion of bowl portion 10. Water collection portion 14 is formed with a first area 100 to which discharge passage 17 is connected, and a second area 101 located forward of first area 100. The main flow of the first flush water discharged from first water outlet 12 along rim portion 11 swirls around bowl portion 10 and flows into first area 100.

[0089] As a result, the flush toilet 1 causes the main flow of the first flush water, which has a large swirling force, to flow into the first area 100, where it agitates the waste while pushing it into the drainage passage 17, thereby discharging the waste. As a result, the flush toilet 1 can improve the dischargeability of waste.

[0090] The flush toilet 1 also has a first water outlet 12 and a second water outlet 13. The first water outlet 12 spouts first flush water along the rim portion 11. The second water outlet 13 is provided in a location different from the first water outlet 12, and spouts second flush water. The main flow of the first flush water flows into the first area 100. The second flush water flows into the second area 101.

[0091] As a result, the flush toilet 1 agitates the waste in the first area 100 with the main flow of the first flush water, and agitates the waste in the second area 101 with the second flush water. As a result, the flush toilet 1 can improve the agitation of the waste, and improve the dischargeability of the waste. Also, when discharging waste, the flush toilet 1 pushes the waste into the discharge channel 17 with the flush water that flows from the second area 101 into the first area 100, and the waste can be discharged from the discharge channel 17. As a result, the flush toilet 1 can improve the dischargeability of the waste.

[0092] Furthermore, the flush toilet 1 forms a first swirling flow in the first area 100, and forms a second swirling flow in the second area 101 that is different from the first swirling flow.

[0093] As a result, the flush toilet 1 forms a swirling flow in each of the areas 100, 101, and agitates the waste with each swirling flow. As a result, the flush toilet 1 can improve the agitation of waste and improve the dischargeability of waste, compared to, for example, a case in which waste is agitated by one large swirling flow in the water storage section 14. The flush toilet 1 can also agitate waste with the first swirling flow and the second swirling flow near the boundary between the first area 100 and the second area 101. As a result, the flush toilet 1 can improve the agitation of waste and improve the dischargeability of waste.

[0094] Furthermore, in the flush toilet 1 , a portion of the first flush water branches off from the main flow of the first flush water, merges with the second flush water, and flows into the second area 101 .

[0095] As a result, the flush toilet 1 merges the first flush water and the second flush water, and forms a second swirling flow in the second area 101 with flush water that has great momentum. As a result, the flush toilet 1 is able to increase the momentum of the second swirling flow in the second area 101, improving the agitation of waste in the second area 101 and improving the dischargeability of waste. Furthermore, when discharging waste, the flush toilet 1 can cause the second swirling flow, which has great momentum, to flow from the second area 101 into the first area 100, pushing the waste into the discharge passage 17. As a result, the flush toilet 1 is able to improve the dischargeability of waste.

[0096] In addition, the bottom wall 21a which forms the water passage 15 through which the first flush water flows along the rim portion 11 increases in height from the end on the first water outlet 12 side towards the front end of the bowl portion 10.

[0097] As a result, the flush toilet 1 reduces the kinetic energy of the main flow of the first flush water, and suppresses the momentum of the main flow of the first flush water. In other words, the flush toilet 1 adjusts the swirling force of the main flow of the first flush water, and can suppress the main flow of the first flush water from swirling too much. As a result, the flush toilet 1 can cause the main flow of the first flush water, the momentum of which has been adjusted, to flow into the first area 100, and can form a first swirling flow in the first area 100 that is excellent at agitating waste. The flush toilet 1 can therefore improve the dischargeability of waste.

[0098] Furthermore, the height of bottom wall 21a continues to increase up to the front end of bowl portion 10.

[0099] As a result, the flush toilet 1 is able to continuously reduce the kinetic energy of the main flow of the first flush water, and is able to prevent the main flow of the first flush water from becoming turbulent.

[0100] Bowl portion 10 also includes first guide portion 20a through which a portion of the first flush water branches off from water passage 15 and flows.

[0101] This allows the flush toilet 1 to reduce the kinetic energy of the main flow of the first flush water, and adjust the swirling force of the main flow of the first flush water. As a result, the flush toilet 1 prevents the main flow of the first flush water from swirling too much, and can form a first swirling flow in the first area 100 that is excellent at agitating waste. The flush toilet 1 can therefore improve the dischargeability of waste.

[0102] The first guide portion 20a has an inclination that increases from the rear to the front.

[0103] As a result, the flush toilet 1 is able to prevent the first flush water that branches off from the mainstream of the first flush water from merging into the mainstream of the first flush water. The flush toilet 1 is also able to cause the first flush water that branches off from the mainstream of the first flush water to flow into the second area 101.

[0104] Moreover, the length from the upper end of the water collecting portion 14 to the upper end of the first guide portion 20b increases toward the front of the bowl portion 10.

[0105] As a result, the flush toilet 1 is able to disperse the first flush water that deviates from the mainstream of the first flush water in the first guide section 20, which is forward of the pool section 14, and reduce the kinetic energy of the first flush water flowing through the first guide section 20. As a result, the flush toilet 1 is able to prevent the first flush water flowing through the first guide section 20, which is forward of the pool section 14, from joining the mainstream of the first flush water, and is able to form a first swirling flow in the first region 100 that is excellent at agitating waste. The flush toilet 1 is therefore able to improve the dischargeability of waste.

[0106] Moreover, the upper end of the water collecting section 14 is lowest at its front end.

[0107] As a result, the flush toilet 1 can increase the length of the first guide section 20 at the centre in the left-right direction in the first guide section 20 that is forward of the water pool section 14, and can reduce the kinetic energy of the first flush water flowing through the first guide section 20. As a result, the flush toilet 1 can prevent the first flush water flowing through the first guide section 20 that is forward of the water pool section 14 from merging with the main flow of first flush water, and can form a first swirling flow in the first area 100 that is excellent at agitating waste. The flush toilet 1 can therefore improve the dischargeability of waste.

[0108] Furthermore, the flush toilet 1 is equipped with an area enlarging section 21b that enlarges the discharge area of ​​the first flush water discharged from the first water discharge port 12.

[0109] As a result, flush toilet 1 prevents the discharge area of ​​water passage 15 for the first flush water from becoming smaller, even if bottom wall 21a forming water passage 15 is formed so that it rises from the first water outlet 12 side toward the front end of rim section 11. As a result, flush toilet 1 prevents first flush water from accumulating in water passage 15, and can discharge the first flush water smoothly. Therefore, flush toilet 1 can prevent insufficient swirling of the main flow of the first flush water, and can improve the dischargeability of waste.

[0110] Moreover, the area enlargement portion 21b is formed below the first water outlet 12.

[0111] This makes it possible for the flush toilet 1 to prevent unexpected accumulation of the first flush water in the water passage 15 through which the first flush water flows, and to prevent insufficient swirling of the main flow of the first flush water. As a result, the flush toilet 1 can improve the dischargeability of waste.

[0112] Further, the area enlargement portion 21b is formed at the end portion of the bottom wall 21a on the first water outlet 12 side.

[0113] As a result, the flush toilet 1 is able to prevent the first flush water from accumulating immediately after being discharged from the first water discharge port 12.

[0114] The enlarged area portion 21b is inclined so that the bowl portion 10 side is lower than the rim portion 11 side.

[0115] As a result, the flush toilet 1 can cause a portion of the first flush water that flows into the enlarged area section 21b to quickly flow down into the first guide section 20, and can prevent the first flush water from accumulating in the enlarged area section 21b. As a result, the flush toilet 1 can prevent insufficient swirling of the main flow of the first flush water. The flush toilet 1 can therefore improve the dischargeability of waste.

[0116] The bowl portion 10 also includes a first guide portion 20b that swirls the first flush water from left to right and causes the first flush water that has swirled to the right to flow into the first region 100.

[0117] As a result, the flush toilet 1 is able to cause the first flush water that is deviated from the mainstream of the first flush water to flow into the first area 100, and is able to increase the momentum of the first swirling flow in the first area 100. As a result, the flush toilet 1 is able to improve the dischargeability of waste.

[0118] Moreover, the first guide portion 20 is formed so as to widen from the front to the rear.

[0119] As a result, the flush toilet 1 can cause the first flush water, which has deviated from the mainstream of the first flush water and flowed near the left-right center of the first guide section 20, to flow into the first flow area while swirling along the first guide section 20. As a result, the flush toilet 1 can increase the momentum of the first swirling flow in the first area 100, improving the dischargeability of waste.

[0120] Additionally, bowl section 10 is provided with second guide section 21, located above first guide section 20, through which first flush water flows, the flow of which is different from the flow of the first flush water flowing through first guide section 20. Ridge section 23 connecting first guide section 20 and second guide section 21 becomes longer in distance from center line O of bowl section 10 in the left-right direction from the front to the rear.

[0121] As a result, the flush toilet 1 is able to prevent the first flush water flowing through the first guide section 20 from flowing into the second guide section 21. In other words, the flush toilet 1 is able to prevent flush water that has deviated from the main flow of the first flush water from joining the main flow of the first flush water. As a result, the flush toilet 1 is able to prevent the main flow of the first flush water from becoming turbulent, and to prevent a reduction in the flow speed of the main flow of the first flush water. The flush toilet 1 is therefore able to improve the discharge of waste through the first swirling flow.

[0122] The right-side ridge portion 23 terminates rearward of the midpoint of the water pooling portion 14 in the front-rear direction.

[0123] This allows the flush toilet 1 to cause the first flush water that has swirled to the rear to flow into the first area 100. The flush toilet 1 can also generate a first swirling flow in the first area 100 that follows the shape of the rear surface 31 of the water storage section 14 that forms the first area 100. As a result, the flush toilet 1 can agitate the waste with the powerful first swirling flow, improving the agitation of the waste in the first area 100 and improving the dischargeability of the waste.

[0124] Moreover, in the first guide portion 20 located in front of the water pooling portion 14, the curvature of the curved surface forming the first guide portion 20 increases from the front to the rear.

[0125] As a result, the flush toilet 1 can rapidly change the direction of the first flush water flowing into a location close to the water storage section 14, at the first guide section 20 which is forward of the water storage section 14, and prevent the first flush water from flowing into the second area 101. The flush toilet 1 can then swirl the first flush water to the right, causing it to flow into the first area 100. The flush toilet 1 also prevents the direction of the first flush water flowing into the front side of the bowl section 10 from being rapidly changed, at the first guide section 20 which is forward of the water storage section 14. As a result, the flush toilet 1 can prevent the first flush water from flowing into the second area 101, and can swirl the first flush water to the right, causing it to flow into the first area 100.

[0126] The water collecting section 14 also includes a front surface portion 30, a rear surface portion 31, and a pair of side surface portions 32. The rear surface portion 31 is formed rearward of the front surface portion 30. The pair of side surface portions 32 are formed between the front surface portion 30 and the rear surface portion 31. At least one of the pair of side surface portions 32 has a convex surface 32a formed thereon that protrudes toward the other side surface portion 32.

[0127] As the flush water that flows into the water pool section 14 flows along the side surface 32, the swirling motion is separated by the convex surface 32a of the side surface 32. As a result, the flush toilet 1 forms a first swirling flow and a second swirling flow in the water pool section 14. As a result, the flush toilet 1 is able to agitate the waste with each swirling flow, improving the agitation of the waste and improving its dischargeability.

[0128] In addition, the water storage section 14 is formed with a first region 100 to which the discharge passage 17 is connected, and a second region 101 located forward of the first region 100, and the convex surface 32a is formed from the first region 100 to the second region 101.

[0129] As a result, the flush toilet 1 is able to generate a first swirl flow and a second swirl flow in the pooling section 14 without complicating the shape of the pooling section 14.

[0130] The apex of the convex surface 32 a is located at the boundary between the first region 100 and the second region 101 .

[0131] As a result, the flush toilet 1 is able to separate the first area 100, to which the discharge passage 17 is connected, from the second area 101 by the convex surface 32a, and is able to form a first swirling flow and a second swirling flow independently. As a result, the flush toilet 1 is able to agitate the waste with each swirling flow, improving the agitation of the waste and improving its dischargeability.

[0132] Moreover, the convex surface 32a is formed along the vertical direction.

[0133] This allows the flush toilet 1 to form a first swirling flow in the entire first area 100, and a second swirling flow in the entire second area 101. As a result, the flush toilet 1 can improve the agitation of waste in each of the areas 100, 101, and improve the discharge of waste.

[0134] Furthermore, the area of ​​the first region 100 in the horizontal direction is larger than the area of ​​the second region 101 in the horizontal direction.

[0135] As a result, the flush toilet 1 agitates the waste with a second swirling flow having a small swirl radius in the second area 101. The flush toilet 1 also generates a first swirling flow with a large swirl radius in the first area 100 to which the discharge passage 17 is connected, and expels waste from the first area 100 with the first swirling flow. As a result, the flush toilet 1 can improve the agitation of waste, and improve the discharge of waste.

[0136] The convex surfaces 32a are formed on the pair of side surface portions 32, respectively.

[0137] As a result, the flush toilet 1 is able to promote the formation of a first swirling flow in the first area 100, and promote the formation of a second swirling flow in the second area 101. As a result, the flush toilet 1 can improve the agitation of waste, and improve the dischargeability of waste.

[0138] Moreover, the curved surface of the water pooling section 14 that forms the first region 100 has a different curvature in the vertical direction.

[0139] As a result, the flush toilet 1 is able to form, in the vertical direction of the first area 100, a first swirling flow that mainly agitates the waste, and a first swirling flow that mainly pushes the waste into the discharge passage 17, causing the waste to be discharged. As a result, the flush toilet 1 can improve the agitation of the waste, and improve the discharge of the waste.

[0140] Additionally, an upper region 100b and a lower region 100a formed below the upper region 100b are formed in the first region 100. The curvature of the curved surface forming the upper region 100b is greater than the curvature of the curved surface forming the lower region 100a.

[0141] As a result, the flush toilet 1 forms a first swirling flow with a large change in flow rate in the upper area 100b, allowing the waste to be agitated. The flush toilet 1 also forms a first swirling flow with a small change in flow rate in the lower area 100a, pushing the waste into the discharge passage 17, allowing the waste to be discharged.

[0142] Moreover, the curvature of the curved surface that forms the first region 100 gradually changes from the upper region 100b toward the lower region 100a.

[0143] As a result, the flush toilet 1 can reduce energy loss when switching from a first swirling flow, which has a large change in flow rate, to a second swirling flow, which has a small change in flow rate, improving waste dischargeability.

[0144] Furthermore, the curvature of the curved surface that forms the upper region 100b is different from the curvature of the curved surface that forms the second region 101.

[0145] This allows the flush toilet 1 to swirl the first swirling flow in the upper area 100b and the second swirling flow in the second area 101 at different flow velocities. As a result, the flush toilet 1 can improve the agitation of waste, and improve the discharge of waste.

[0146] Moreover, the curvature of the curved surface that forms the lower region 100a is smaller than the curvature of the curved surface that forms the second region 101.

[0147] As a result, the flush toilet 1 can smoothly guide the second swirling flow from the second area 101 to the lower area 100a, improving the dischargeability of waste.

[0148] <Modification> In a flush toilet 1 according to a modified example, the drainage channel 17 may be connected to the area in front of the pool section 14. Additionally, in a flush toilet 1 according to a modified example, a convex surface 32a may be formed on one of the pair of side sections 32.

[0149] Furthermore, in a flush toilet 1 according to a modified example, the first water outlet 12 may be formed in a tapered shape so that the first flush water spreads, and the discharge area of ​​the first flush water may be expanded from the first water outlet 12. For example, the first water outlet 12 is formed so as to expand the discharge area of ​​the first flush water upward or to the right.

[0150] Furthermore, the flush toilet 1 according to the modified example may be a flush toilet that includes part of the configuration described above. For example, the flush toilet 1 according to the modified example may be a flush toilet that has a water collection section 14 in which the pair of side sections 32 do not have the convex surface 32a formed thereon, or a flush toilet that has a bowl section 10 in which the first guide section 20 is not formed. Also, for example, the flush toilet 1 according to the modified example may be a flush toilet that only has the first spout 12.

[0151] Further advantages and modifications may readily occur to those skilled in the art. Thus, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and equivalents thereof. [Explanation of symbols]

[0152] 1 flush toilet 2 Toilet bowl body 10 Bowl section 11 Rim section 12 First outlet (outlet) 13 Second outlet (outlet) 14 Reservoir 15 Canal 17 Exhaust channel 20 First guide part (guide part) 21 Second guide section (rotating section) 21a Bottom wall 21b Area expansion section (expansion section) 23 Ridgeline 30 Front part 31 Rear part 32 Side part 32a Convex 33 Bottom part 100 1st area 100a lower area 100b upper area 101 Second area

Claims

1. A bowl portion for receiving waste; A rim portion formed on an upper portion of the bowl portion; A water outlet for discharging cleaning water; a water collecting portion formed at a lower portion of the bowl portion; Equipped with The water outlet is A first water outlet that discharges the flush water along the rim portion; a second water outlet provided at a location different from the first water outlet and for ejecting the flush water; Equipped with The water collecting section is formed with a first region which is an upper region of the drainage channel connected to the bottom surface section, and a second region which is located forward of the first region, The first water outlet is provided on one side of the center line of the bowl portion, The second water outlet is provided on the other side of the center line of the bowl portion and on the rear side as viewed from the first water outlet, The bowl portion is A rear wall portion formed at a rear end of the bowl portion and recessed rearward; a guide portion formed on the one side, formed from behind the first water outlet to a front end of the bowl portion, and formed on an upper portion of the water collecting portion; The guide portion has an inclination that becomes larger from the rear to the front, the inclination being downward toward the center line until the guide portion reaches a vicinity of a front end of the second region, The second water discharge port discharges the flush water along the rear wall portion toward the side where the first water discharge port is provided in the left-right direction, A main flow of the flush water discharged from the first water discharge port along the rim portion swirls from the front surface to the rear surface of the bowl portion and flows into the first area from the upper end of the water storage portion in the first area, The flush water discharged from the second water discharge port toward the rear end of the bowl portion swirls along the rear wall portion while swirling in the same direction as the main flow of the flush water discharged from the first water discharge port, and then flows along the guide portion and into the second area. A flush toilet characterized by:

2. In the first region, a first swirling flow is formed, In the second region, a second swirling flow different from the first swirling flow is formed.

2. The flush toilet according to claim 1.

3. A portion of the flush water discharged from the first water discharge port branches off from the main flow, merges with the flush water discharged from the second water discharge port, and flows into the second area.

3. The flush toilet according to claim 1 or 2.

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