Toilet bowl device

Abstract

To provide a novel technology in a toilet bowl device including a flow channel that flows cleaning water toward a discharge port.SOLUTION: A technology disclosed in the descriptions relates to a toilet bowl device. The toilet bowl device may include a toilet bowl having water retention part located downward and a flow channel, having a discharge port at least part of which is immersed in the water retention part, that is located downward the toilet bowl and flows cleaning water toward the discharge port. The flow channel may include: a first cross-sectional shape being a cross-sectional shape of the flow channel in a first plane orthogonal to a flow direction in an intermediate position of the flow channel; and a second cross-sectional shape being a cross-sectional shape of the flow channel in a second plane orthogonal to the flow direction downstream relative to the first plane. A length of the second cross-sectional shape in a horizontal direction may be longer than a length of the first cross-sectional shape in the horizontal direction, and an area of the second cross-sectional shape may be larger than an area of the first cross-sectional shape.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a toilet apparatus. [Background technology]

[0002] Patent Document 1 discloses a flush toilet equipped with a jet water conduit. The jet water conduit extends from a water conduit inlet, which allows flush water to flow into the flush toilet body, to a jet water outlet provided at the bottom of the bowl part of the flush toilet body, and guides flush water to the jet water outlet. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-3250 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the jet water conduit of the flush toilet in Patent Document 1, the cross-sectional area of ​​the flow path becomes smaller toward the downstream side. No consideration has been given to the configuration of the jet water conduit. This specification provides a new technology related to the flow path in a toilet device that has a water outlet at least partially submerged in the water reservoir of the toilet bowl and is equipped with a flow path that flows flush water toward the water outlet. [Means for solving the problem]

[0005] The technology disclosed in this specification relates to a toilet device. The toilet device may include a toilet bowl having a water storage section located below, and a flow path having a water outlet at least a portion of which is submerged in the water storage section, the flow path being disposed below the toilet bowl and flowing flush water along a flow direction toward the water outlet. The flow path may have a first cross-sectional shape that is a cross-sectional shape of the flow path in a first plane perpendicular to the flow direction at an intermediate position of the flow path, and a second cross-sectional shape that is a cross-sectional shape of the flow path in a second plane perpendicular to the flow direction downstream of the first plane. The vertical length of the second cross-sectional shape may be longer than the vertical length of the first cross-sectional shape, and the area of ​​the second cross-sectional shape may be larger than the area of ​​the first cross-sectional shape. [Brief description of the drawings]

[0006] [Figure 1] 1 is a perspective view of a toilet device according to an embodiment; [Diagram 2] FIG. 2 shows a cross-sectional view of the toilet body and toilet seat taken at the center in the left-right direction and perpendicular to the left-right direction. [Diagram 3] 3 shows a cross-sectional view of the toilet bowl and the upper rim portion taken along line III-III in FIG. 2. [Figure 4] FIG. 2 is a block diagram showing the configuration of a discharge unit according to the embodiment. [Diagram 5] FIG. 2 shows a side view of the discharge portion of the embodiment. [Figure 6] FIG. 2 shows a plan view of a discharge portion of the embodiment. [Figure 7] FIG. [Figure 8] 8 shows a cross-sectional view of the toilet body taken along line CC in FIG. 7. [Figure 9] 8 shows a cross-sectional view of the toilet body taken along the line FF in FIG. 7. [Figure 10] 8 shows a cross-sectional view of the toilet body taken along the line KK in FIG. 7. [Figure 11] The cross-sectional area and height of each cross-sectional shape of the supply path are shown. [Figure 12] 1 shows a graph of the cross-sectional area and height at each cross section of the supply path. [Figure 13]1 shows a graph of the cross-sectional area and the rate of change of height at each cross section of the supply path. [Figure 14] Indicates the change in pump speed. [Figure 15] The height of the washing water surface at each timing of the large washing process is shown. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] (Configuration of toilet device 10) As shown in Fig. 1, the toilet apparatus 10 is a flush toilet. The toilet apparatus 10 is fixed to a floor surface when in use. The toilet apparatus 10 may be, for example, a so-called wall-hung flush toilet that is fixed to a wall.

[0008] The toilet device 10 comprises a toilet portion 12, a toilet seat 14, an operating device 15, a functional portion 16, a reservoir 18 (see FIG. 2), an on-off valve 19, a water discharge portion 40 (see FIG. 4), a control portion 100, and a seating sensor 90. FIG. 2 shows a cross-sectional view perpendicular to the left-right direction at the center of the left-right direction of the toilet portion 12. As shown in FIG. 2, the toilet portion 12 comprises a toilet body 20 and an upper end rim portion 30. The toilet body 20 is made of ceramic. The toilet body 20 comprises a toilet bowl 22 that receives waste. The toilet body 20 accommodates a reservoir 18 at the lower end of the toilet body 20. The reservoir 18 stores flushing water for flushing the toilet bowl 22. Water is supplied to the reservoir 18 from a clean water pipe (not shown). The on-off valve 19 switches between communication and blocking between the clean water pipe and the reservoir 18. The functional unit 16 may have functions such as an opening and closing function for automatically opening and closing a toilet lid (not shown) in accordance with the user's actions, a local cleaning function, a hot air drying function, and a deodorizing function.

[0009] The operating device 15 is attached to a wall surface of the toilet room in which the toilet apparatus 10 is placed. In a modified example, the operating device 15 may be a remote controller electrically connected to the water discharger 40 either wired or wirelessly. The operating device 15 is operated by a user to operate the toilet apparatus 10. The operating device 15 includes a large flush button 15a, a small flush button 15b, and a display 15d. The large flush button 15a is a button that allows the toilet apparatus 10 to receive an instruction from the user to execute a large flush process. The large flush process is a process in which flush water is supplied from the water discharger 40 to the toilet bowl 22. The large flush process causes waste and the like in the toilet bowl 22 to be discharged into a sewer pipe (not shown) connected to the toilet body 20. The small flush button 15b is a button that allows the toilet apparatus 10 to receive an instruction from the user to execute a small flush process. The small flush process is a process in which less flush water is supplied to the toilet bowl 22 than in the large flush process. The small flush process discharges waste and the like from within the toilet bowl 22 into a sewer pipe connected to the toilet body 20. The large flush button 15a and the small flush button 15b are each electrically connected to the water discharge unit 40. When the user operates each of the buttons 15a, 15b, flush water is discharged from the reservoir 18 via the water discharge unit 40 into the toilet bowl 22, and a flush process corresponding to the button operated by the user is executed. Although not shown in the figure, the operating device 15 further includes buttons for operating functional units, such as a flushing function for washing the buttocks of the human body. The display 15d is a liquid crystal display, and displays various information related to the toilet device 10 to the user.

[0010] In the toilet apparatus 10, in addition to the operation of the large flush button 15a and the small flush button 15b, each flush process may be performed by the operation of a lever arranged on the toilet apparatus 10. For example, the large flush process may be performed without any operation by the user. For example, the large flush process may be performed when the user is no longer detected by the seating sensor 90.

[0011] The toilet seat 14 is attached to the toilet bowl body 20 so as to be openable and closable. A user sits on the toilet seat 14. The toilet seat 14 has an opening 14a. A seating sensor 90 is disposed on the toilet seat 14. When a user sits on the toilet seat 14, the toilet seat 14 moves downward. The seating sensor 90 detects the up and down movement of the toilet seat 14, thereby detecting the user sitting and leaving the seat. In a modified example, the seating sensor 90 may be a contact sensor, an infrared sensor, a capacitance sensor, or the like, that directly detects the user. Instead of the seating sensor 90, a human presence sensor (e.g., an infrared sensor, a camera, etc.) that detects the user may also be used.

[0012] Hereinafter, the direction in which the toilet seat 14 and the functional part 16 are arranged is referred to as the front-rear direction. In the front-rear direction, the side on which the toilet seat 14 is arranged with respect to the functional part 16 is referred to as the front side of the front-rear direction, and the opposite side is referred to as the rear side. The horizontal direction perpendicular to the front-rear direction is referred to as the left-right direction. In the left-right direction, the rear side of the paper in FIG. 1 is referred to as the right side, and the front side of the paper in FIG. 1 is referred to as the left side. The left and right directions correspond to the left and right as seen by a user facing the toilet device 10. The vertical direction perpendicular to the front-rear direction is referred to as the up-down direction. In the up-down direction, the side on which the reservoir 18 is arranged with respect to the toilet body 20 is referred to as the lower side, and the opposite side is referred to as the lower side.

[0013] The toilet bowl 22 has a shape that is generally recessed downward. As shown in FIG. 2, the toilet bowl 22 has a water storage section 24 disposed at the lower end of the toilet bowl 22. The toilet body 20 has a drainage flow passage 36 that communicates with the water storage section 24, and a drain outlet 34 that opens into the water storage section 24. The drainage flow passage 36 is inclined upward as it proceeds from the bottom of the water storage section 24 toward the back. That is, the drainage flow passage 36 extends upward from the bottom of the toilet bowl 22. As a result, before flushing water is supplied to the drainage flow passage 36, flushing water is stored in the drainage flow passage 36, and the drainage flow passage 36 functions as a trap. The rear end 36a of the drainage flow passage 36 is connected to a first drain pipe 37. The first drain pipe 37 is made of resin. The first drain pipe 37 is curved downward from the rear end 36a of the drainage flow passage 36. The lower end of the first drain pipe 37 is connected to a second drain pipe 38. The second drain pipe 38 is connected to a sewer pipe (not shown).

[0014] In the toilet apparatus 10 of this embodiment, after either the large flush process or the small flush process has been performed, flush water is stored up to the position of the first water level WS1 in the water storage section 24. In this embodiment, in a situation where flush water is not being supplied to the toilet bowl 22, the area below the first water level WS1 is referred to as the water storage section 24.

[0015] An upper rim portion 30 is disposed at the upper end of the toilet bowl 22, going around the upper edge 22a of the toilet bowl 22. The upper rim portion 30 is disposed at the upper end of the toilet body 20. The upper rim portion 30 protrudes inward from the upper edge 22a so as to face the surface of the toilet bowl 22. The underside 30a of the upper rim portion 30 is disposed vertically in the up-down direction.

[0016] Toilet bowl 22 comprises front surface 23, side surface 26, and rear surface 25. Front surface 23 is a surface of toilet bowl 22 that is located in front of the front end of first water surface WS1. Side surface 26 is a surface of toilet bowl 22 that extends in the rear direction from the rear end of front surface 23 along both the left and right ends of first water surface WS1. Side surface 26 extends in the rear direction to a position aligned with the rear end of first water surface WS1 on the surface of toilet bowl 22. Rear surface 25 is a region of the surface of toilet bowl 22 that connects the rear ends of side surfaces 26 on both the left and right sides along the rear end of first water surface WS1.

[0017] The front surface 23 has a linear shape 23a that slopes downward from the upper edge 22a toward the back, i.e., the first water surface WS1, and a curved shape 23b that curves downward from the lower end of the linear shape 23a toward the first water surface WS1. In the "curved shape that curves downward," in a cross section perpendicular to the left-right direction, a line segment representing a surface located between any two points of the curved shape is located below the line connecting the any two points. The linear shape 23a extends in the tangential direction of the curved shape 23b. The boundary between the linear shape 23a and the curved shape 23b is smooth and continuous without any step. The front surface 23 has a curved shape 23b that has a curved shape that curves downward in a cross section perpendicular to the front-rear direction at any position in the front-rear direction. The front surface 23 is similar in a cross section perpendicular to the left-right direction at any position in the left-right direction of the toilet bowl 22. The front surface 23 does not have a shape that bulges upward.

[0018] In a cross section perpendicular to the left-right direction at the center of the left-right direction of toilet bowl 22, the portion located below front surface 23 has a linear shape that slopes backward as it extends downward.

[0019] The linear shape 23a has a plane that slopes downward from the upper edge 22a toward the first water surface WS1 in a cross section perpendicular to the front-rear direction at an arbitrary position in the front-rear direction. The curved shape 23b curves downward from the lower end of the linear shape 23a to the first water surface WS1 in a cross section perpendicular to the front-rear direction at an arbitrary position in the front-rear direction.

[0020] The side surface 26 has different shapes in the front and rear portions in a cross section perpendicular to the front-rear direction. The front portion of the side surface 26 has a curved shape that continues from the front surface 23 and curves downward. The curved shape extends beyond the first water surface WS1 to the water pool 24. As shown in FIG. 3, the side surface 26 has a linear shape 26a that slopes downward from the upper edge 22a toward the first water surface WS1, a curved shape 26b that curves downward at an intermediate position from the lower end of the linear shape 26a to the first water surface WS1, and a curved shape 26c that curves upward from the lower end of the curved shape 26b to the first water surface WS1. The curved shape 26c extends beyond the first water surface WS1 to the water pool 24. The portion having the curved shape 26c is the rear portion of the toilet body 20, and the portion not having the curved shape 26c is the front portion of the toilet body 20. The boundary between the front and rear parts of the toilet body 20 may be the position of the drain outlet 34 in the front-to-rear direction.

[0021] As shown in FIG. 2, in a cross section perpendicular to the left-right direction at the center of the left-right direction of the toilet bowl 22, the rear surface 25 has a straight line shape 25a that slopes downward from the upper edge 22a toward the front, i.e., the first water surface WS1, a curved shape 25b that curves downward at an intermediate position between the bottom end of the straight line shape 25a and the first water surface WS1, and a curved shape 25c that curves upward from the bottom end of the curved shape 25b to the first water surface WS1. The straight line shape 25a may be parallel to the up-down direction. The rear surface 25 is located behind the rear edge of the opening 14a of the toilet seat 14. This makes it difficult for the user to see the rear surface 25.

[0022] (Configuration of the water outlet) The water discharger 40 discharges flush water in the reservoir 18 into the toilet bowl 22. As shown in FIG. 4, the water discharger 40 includes a pump 42, a connecting pipe 44, a check valve 45, a switching valve device 46, branch pipes 48a, 48b, 48c, 48d, water discharge nozzles 50, 52, and a spreader 60.

[0023] The pump 42 draws in the wash water in the reservoir 18 and pressurizes it. The pump 42 sends the pressurized wash water to the communicating pipe 44. The communicating pipe 44 is in communication with the pump 42. The communicating pipe 44 defines a flow path through which the wash water flows. The communicating pipe 44 is in communication with the switching valve device 46 via a check valve 45. The check valve 45 allows the wash water to flow from the pump 42 toward the switching valve device 46. The check valve 45 restricts the wash water from flowing from the switching valve device 46 toward the pump 42. This makes it possible to prevent the wash water from flowing back to the pump 42 via the communicating pipe 44. By arranging the check valve 45 closer to the pump 42 than the switching valve device 46, the number of check valves 45 can be reduced.

[0024] The switching valve device 46 connects the communicating pipe 44 to at least one of the branch pipes 48a, 48b, 48c, and 48d. The communicating pipe 44 and the branch pipes 48a, 48b, 48c, and 48d are each made of a resin such as a synthetic resin. Synthetic rubber is used in at least one of the connection parts of the branch pipes 48a and 48c with the pump 42 and the water discharge nozzles 50 and 52 to improve liquid tightness. The downstream end of the branch pipe 48d is connected to a supply flow path 70 arranged in the toilet body 20. The supply flow path 70 is made of ceramic.

[0025] A water discharge nozzle 50 is connected to the branch pipe 48a. When the communication pipe 44 is connected to the branch pipe 48a via the switching valve device 46, flush water is discharged from the water discharge nozzle 50 into the toilet bowl 22. A spreader 60 is connected to the branch pipe 48b. When the communication pipe 44 is connected to the branch pipe 48b via the switching valve device 46, flush water is discharged from the spreader 60 into the toilet bowl 22. A water discharge nozzle 52 is connected to the branch pipe 48c. When the communication pipe 44 is connected to the branch pipe 48c via the switching valve device 46, flush water is discharged from the water discharge nozzle 52 into the toilet bowl 22. A water discharge opening 54 is connected to the branch pipe 48d via the first flow path. When the communication pipe 44 is connected to the branch pipe 48d via the switching valve device 46, flush water is discharged from the water discharge opening 54 into the toilet bowl 22.

[0026] As shown in FIG. 3, the water-spouting nozzles 50, 52 and the spreader 60 are arranged side by side in the left-right direction. The water-spouting nozzle 50 is arranged near the upper end of the toilet bowl 22. The water-spouting nozzle 50 has an opening 50a that is long in the vertical direction. The water-spouting nozzle 52 is arranged symmetrically with the water-spouting nozzle 50. As shown in FIG. 2, the front ends of the water-spouting nozzles 50, 52 are arranged forward of the rear end of the first water surface WS1. The spreader 60 is arranged further back than the rear end of the first water surface WS1. The spreader 60 is arranged further back than the rear end of the first water surface WS1. The water-spouting nozzles 50, 52 each have an opening that extends in the vertical direction. The flushing water discharged from the water-spouting nozzles 50, 52 flows into the toilet bowl 22 located below the upper end rim portion 30. The upper end rim portion 30 is formed of a single flat plate, and flushing water does not flow inside.

[0027] As shown in FIG. 4, the supply flow passage 70 has a water discharge opening 54 at its downstream end. As shown in FIG. 2, the water discharge opening 54 opens into the water storage section 24. That is, the entire water discharge opening 54 is submerged in the water storage section 24. The water discharge opening 54 opens from the front side toward the drain outlet 34 on the rear side. That is, the water discharge opening 54 faces the drain outlet 34. As shown by the arrow F2 in FIG. 2, when flush water is discharged from the water discharge opening 54, the flush water from the water discharge opening 54 is discharged toward the drain outlet 34. As a result, the flush water in the water storage section 24, together with the flush water from the water discharge opening 54, is discharged into an external sewer pipe via the drain flow passage 36 and each drain pipe 37, 38. Waste in the water storage section 24 and objects floating in the water in the water storage section 24 are also discharged from the drain flow passage 36 to the outside of the toilet body 20.

[0028] As shown by the arrow F1 in FIG. 6, flushing water discharged from the water discharge nozzle 50 flows near the upper end of the toilet bowl 22 along the upper rim portion 30. The flushing water flow path defined by the water discharge nozzle 50 from the branch pipe 48a is called the first rim flow path. As particularly shown by the arrow F1 in FIG. 2, flushing water discharged from the water discharge nozzle 52 flows near the upper end of the toilet bowl 22 along the upper rim portion 30. The flushing water flow path defined by the water discharge nozzle 52 from the branch pipe 48c is called the second rim flow path. The flushing water discharged from the water discharge nozzles 50, 52 flows downward from near the upper end. The flushing water discharged from the water discharge nozzles 50, 52 flows over a wide area of ​​the toilet bowl 22 from the upper end to the lower end. This makes it possible to remove dirt adhering to the side surface 26 and the front surface 23 of the toilet bowl 22 in particular. As described above, the water discharge nozzle 50 has a long opening 50a in the vertical direction, so that flushing water is discharged from the opening 50a at a relatively high flow rate. As a result, flushing water discharged from the water discharge nozzle 50 flows over the surface of the toilet bowl 22 at a high surface speed and reaches the water pool 24. This ensures that dirt adhering to the surface of the toilet bowl 22 can be removed. The flushing water discharged from the spreader 60 collides with the spreader 60 from the branch pipe 48b, spreads in the vertical and horizontal directions, and is discharged into the toilet bowl 22. The flushing water flow path defined by the spreader 60 from the branch pipe 48b is called the spreader flow path. The flushing water discharged from the water discharge opening 54 functions as a so-called jet water discharge that discharges dirt and the like from the water pool 24. The flushing water flow path formed by the branch pipe 48d and the supply flow path 70 is called the jet flow path.

[0029] Figures 5 and 6 show the configuration of each part of the water discharger 40. All parts of the water discharger 40, except for the branch pipe 48d and the supply flow path 70, are housed in the toilet body 20 at the rear side of the toilet bowl 22. In the toilet body 20, each part of the water discharger 40 is housed in a small space. In each of Figures 5 and 6, some of the configuration has been simplified to prioritize ease of viewing.

[0030] The spreader 60 is attached to the rear surface 25 at the rear side of the toilet bowl 22. The spreader 60 is inserted into a through hole penetrating the toilet body 20 and fixed to the toilet body 20. The spreader 60 protrudes from the rear surface 25 to the inside of the toilet bowl 22. The spreader 60 has one or more outlets in each of the up, down, left and right directions. Flush water flowing into the spreader 60 from the branch pipe 48b collides with the front part of the spreader 60 and spreads in the up, down and left and right directions. The collided flush water is discharged from the multiple outlets of the spreader 60 into the toilet bowl 22. This allows the flush water discharged from the spreader 60 to be discharged from the multiple outlets in multiple directions, upward, downward, left and right. This makes it easier to spread the flush water over the surface of the toilet bowl 22.

[0031] The reservoir 18 extends to the right side of the toilet body 20, close to the upper end of the toilet body 20. A water level sensor 17 is disposed at the upper end of the reservoir 18. The water level sensor 17 is equipped with a float that rises above the water surface when the water level in the reservoir 18 reaches a predetermined position, and a sensor unit that detects whether the float is floating or not. An opening / closing valve 19 is disposed at the upper end of the reservoir 18. The opening / closing valve 19 switches between communication and cut-off between the reservoir 18 and the clean water pipe.

[0032] (Configuration of the supply flow path 70) The supply flow path 70 is a space formed in the toilet body 20. As shown in Fig. 7, the supply flow path 70 comprises a connection portion 72, a first flow path 74, and a second flow path 80. As shown by arrows F3 and F2 in Fig. 7, the supply flow path 70 is a flow path that causes flush water supplied from the branch pipe 48d to flow along flow direction D1 towards the water discharge opening 54. Flow direction D1 indicates the direction in which flush water mainly flows within the supply flow path 70. Flow direction D1 indicates the direction in which, for example, 50% or more of the flush water flows.

[0033] The connecting portion 72 is connected to the downstream end of the branch pipe 48d. The connecting portion 72 has a cylindrical shape extending along the front-rear direction and a square tube shape connected to the downstream end of the cylindrical shape. The connecting portion 72 has a circular flow passage cross section in the cylindrical portion and a square tube portion in the square tube portion. Comparing the two flow passage cross sections, the cross section of the cylindrical portion is smaller than the cross section of the square tube portion. The first flow passage 74 is a flow passage that connects the connecting portion 72 and the second flow passage 80.

[0034] The second flow path 80 is a portion of the supply flow path 70 that is located below the toilet bowl 22. The second flow path 80 includes an upstream section 82, a reduced diameter section 84, and a downstream section 86. The second flow path 80 extends toward the front along the surface of the toilet bowl 22. The front portion of the second flow path 80 curves to the right and in the rear direction, and defines the water discharge opening 54.

[0035] FIG. 8 shows a cross section CC of the upstream portion 82 in a plane perpendicular to the flow direction D1. The upstream portion 82 is defined by an upper wall 83, a pair of side walls 85L, 85R, and a bottom wall 85B. The upper wall 83 is a wall that forms the side surface 26 of the toilet bowl 22. The upper wall 83 is displaced upward toward the left side. That is, the upper wall 83 is displaced upward toward the outside of the toilet device 10. The upper wall 83 of the upstream portion 82 forms the side surface 26 of the toilet bowl 22. The upper wall 83 is displaced upward toward the outside along the side surface 26. For this reason, the upstream portion 82 can be disposed upward and close to the upper wall 83 (i.e., the side surface 26). As a result, it is not necessary to increase the vertical size of the toilet body 20 in order to secure a space for disposing the upstream portion 82 in the toilet body 20.

[0036] FIG. 9 shows a cross section FF of the downstream portion 86 in a plane perpendicular to the flow direction D1. As with the upstream portion 82, the upper edge of the downstream portion 86 is also displaced upward toward the left side. The upper edge of the downstream portion 86 is defined by the lid portion 87, not the upper wall 83. That is, unlike the upstream portion 82, the downstream portion 86 is defined by the lid portion 87, a pair of side walls 85L, 85R, and a bottom wall 85B. As shown in FIG. 7, the lid portion 87 forms a part of the side surface 26 and a part of the front surface 23 of the toilet bowl 22 between the reduced diameter portion 84 and the water discharge opening 54. As shown in FIG. 9, the lid portion 87 is fixed to the upper ends of the pair of side walls 85L, 85R by an adhesive layer 88. In the left-right direction, an adhesive layer 88 is disposed between the lid portion 87 and the upper wall 83. In the up-down direction, an adhesive layer 88 is disposed between the lid portion 87 and the pair of side walls 85L, 85R. In the process of manufacturing the toilet body 20, the boundary between the lid part 87 and the upper wall 83 is repeatedly polished. For this reason, when the toilet body 20 is completed, it is difficult to visually check the boundary between the lid part 87 and the upper wall 83. The adhesive layer 88 is made of a material different from the lid part 87 and the upper wall 83, which are made of ceramic.

[0037] FIG. 10 shows a cross section KK around the reduced diameter portion 84 on a plane along the flow direction D1. The reduced diameter portion 84 is a through hole formed in a barrier 89 arranged at the boundary between the upstream portion 82 and the downstream portion 86. That is, the periphery of the reduced diameter portion 84 is defined by the barrier 89. The barrier 89 is a wall extending in a direction perpendicular to the flow direction D1 of the flushing water. That is, the barrier 89 blocks a part of the second flow path 80 at the middle position of the second flow path 80. The flushing water that has passed through the upstream portion 82 reaches the downstream portion 86 through the reduced diameter portion 84. The upper portion of the barrier 89 extends downward from the upper wall 83. Therefore, when the flushing water passes through the reduced diameter portion 84, the air A1 that flows through the second flow path 80 together with the flushing water is blocked by the barrier 89 and remains on the upstream side of the barrier 89. This makes it possible to suppress the air A1 from being discharged from the water discharge opening 54 together with the flushing water. As a result, it is possible to suppress the generation of abnormal noise.

[0038] As mentioned above, the toilet body 20 is made of pottery. When forming the supply flow passage 70, the connection portion 72, the first flow passage 74, and the hollow structure up to the reduced diameter portion 84 of the second flow passage 80 are formed as a single unit. However, since the downstream portion 86 has a complexly curved shape, it is difficult to form the downstream portion 86 as a single unit as a hollow structure. For this reason, in the process of manufacturing the toilet body 20, the portion downstream of the reduced diameter portion 84 of the second flow passage 80, i.e., the portion downstream of the barrier 89, is formed as a groove defined by a pair of side walls 85L, 85R and a bottom wall 85B, and then covered by the lid portion 87. In other words, the downstream portion 86 is defined by the main body portion, which is composed of the pair of side walls 85L, 85R, and the bottom wall 85B, and the lid portion 87.

[0039] In this way, in the toilet device 10 of this embodiment, the section of the second flow path 80 from the reduced diameter portion 84 to the upstream side is integrally formed as a hollow structure. This allows the lid portion 87 to be smaller than in a configuration in which the entire second flow path 80 is covered with the lid portion 87. This allows the process of polishing the boundary between the lid portion 87 and the upper wall 83 to be shortened. This allows the production efficiency of the toilet body 20 to be improved. As shown in FIG. 7, the reduced diameter portion 84 is located in front of the drain outlet 34 (i.e., forward). This allows the lid portion 87 to be smaller than in a configuration in which the reduced diameter portion 84 is located behind the drain outlet 34 (i.e., rearward).

[0040] 10, since the barrier 89 is disposed between the upstream section 82 and the downstream section 86, the barrier 89 can support the rear edge of the lid section 87 from below. This allows the lid section 87 to be fixed more firmly than in a configuration in which the barrier 89 is not disposed.

[0041] FIG. 11 shows the cross-sectional shape, cross-sectional area, and height of the second flow path 80 at each cross section AA to JJ in FIG. 7. In this specification, "height" refers to the length in the up-down direction between the lowest point and the highest point of each cross-sectional shape. Each cross section AA to JJ is a cross section in a plane perpendicular to the flow direction D1. Each cross-sectional shape indicates the shape of the second flow path 80. That is, each cross-sectional shape indicates the shape of the space through which the cleaning water passes. As shown in FIG. 11, the cross-sectional shape of the second flow path 80 changes along the flow direction D1. Each cross section AA to JJ is a cross section at a position where the cross-sectional shape of the second flow path 80 changes particularly greatly. Each cross section AA to DD shows a cross section of the upstream portion 82. As described above, in the upstream portion 82, the upper end edge of each cross-sectional shape is displaced upward toward the left side.

[0042] Cross section EE shows a cross section of reduced diameter portion 84. Reduced diameter portion 84 is circular. Cross sections FF to JJ show cross sections of downstream portion 86. As described above, in downstream portion 86, the upper edge of each cross section is displaced upward toward the left up to cross section HH, but the upper edges of the cross sections of cross sections II and JJ extend horizontally.

[0043] FIG. 12 shows a graph G1 of the cross-sectional area and a graph G2 of the height at each of the cross sections AA to JJ. In FIG. 12, the cross-sectional area graph G1 is shown by a solid line, and the height graph G2 is shown by a dashed line. As shown in FIG. 12, the cross-sectional area of ​​each of the cross sections AA to JJ becomes smaller toward the downstream side, except between cross sections CC and DD, and between cross sections EE and FF. As shown in FIG. 11, the cross-sectional area of ​​cross section CC (i.e., 545 mm 2 ) is the cross-sectional area of ​​the section DD downstream of the section CC (i.e., 789 mm 2 Similarly, the cross-sectional area of ​​section EE (i.e., 177 mm 2 ) is the cross-sectional area of ​​the section FF downstream of the section EE (i.e., 530 mm 2 ) smaller than

[0044] The height of each of the cross sections AA-JJ decreases toward the downstream side, except between the cross sections EE and FF. The height of the cross section EE (i.e., 15 mm) is lower than the height of the cross section FF downstream of the cross section EE (i.e., 38 mm). The height of the cross-sectional shape of the cross section CC (i.e., 48 mm) is higher than the height of the cross-sectional shape of the cross section DD downstream of the cross section CC (i.e., 43 mm). However, as described above, the cross-sectional area of ​​the cross section CC is smaller than the cross-sectional area of ​​the cross section DD. Thus, the second flow path 80 includes a portion where the cross-sectional area increases as it proceeds downstream, despite the height of the cross-sectional shape decreasing.

[0045] FIG. 13 shows a graph G3 of the cross-sectional area change rate and a graph G4 of the height change rate at each cross section AA to JJ. In FIG. 13, the graph G3 of the cross-sectional area change rate is shown by a solid line, and the graph G4 of the height change rate is shown by a dashed line. The cross-sectional area change rate is a value obtained by dividing the difference between the cross-sectional area on the downstream side and the cross-sectional area on the upstream side by the cross-sectional area on the upstream side. That is, the cross-sectional area change rate indicates the ratio of the difference between the cross-sectional area on the downstream side and the cross-sectional area on the upstream side to the cross-sectional area on the upstream side. Similarly, the height change rate is a value obtained by dividing the difference between the height on the downstream side and the height on the upstream side by the height on the upstream side. As shown in FIG. 13, in principle, the cross-sectional area increases as the height increases. However, the cross-sectional area change rate increases between the cross sections CC and DD, although the height change rate remains almost constant. This is because, as described above, the cross-sectional area increases as the cross section moves downstream between the cross sections CC and DD, although the height of the cross-sectional shape decreases.

[0046] As shown in FIG. 13, the cross-sectional area change rate and the height change rate increase between the cross sections EE and FF. That is, when the cross-sectional shape of the cross section EE is compared with the cross-sectional shape of the cross section FF, the height of the cross-sectional shape of the cross section FF (i.e., 38 mm) is higher than the height of the cross-sectional shape of the cross section EE (i.e., 15 mm). The cross-sectional area of ​​the cross-sectional shape of the cross section FF (i.e., 530 mm 2 ) is the height of the cross-sectional shape of section EE (i.e. 177 mm 2) is larger than the cross-sectional area change rate between the cross sections EE and FF. In other words, between the cross sections EE and FF, the cross-sectional area of ​​the downstream cross section FF (i.e., 530 mm 2 ) and the cross-sectional area of ​​the upstream section EE (i.e. 177 mm 2 ) (i.e. 353 mm 2 ) is approximately twice the cross-sectional area of ​​cross-section EE. The cross-sectional area of ​​cross-section FF is expanded to more than twice the cross-sectional area of ​​cross-section EE.

[0047] (Processing by the control unit) 1, the control unit 100 is housed in the toilet body 20. The control unit 100 is communicatively connected to each of the water level sensor 17, the on-off valve 19, the pump 42, the switching valve device 46, the functional unit 16, the seating sensor 90, and the operation device 15. The control unit 100 controls the water level sensor 17, the on-off valve 19, the pump 42, the switching valve device 46, the functional unit 16, the seating sensor 90, and the operation device 15.

[0048] The control unit 100 includes a CPU and a memory. The memory has a volatile and non-volatile storage unit. The control unit 100 controls the water level sensor 17, the on-off valve 19, the pump 42, the switching valve device 46, the function unit 16, the seating sensor 90, and the operation device 15 by the CPU executing processing according to a computer program previously stored in the memory.

[0049] For example, in response to the user pressing down the large flush button 15a of the operating device 15, the control unit 100 controls the pump 42 and the switching valve device 46 to supply flush water to the toilet bowl 22 from the water discharge nozzles 50, 52, the spreader 60, and the water discharge opening 54. As a result, waste in the toilet bowl 22 is discharged to the outside of the toilet body 20 by the flush water.

[0050] As described above, before the large flush button 15a is pressed down, flush water is stored in the toilet bowl 22 up to the height of the first water surface WS1. As shown in FIG. 14, when the large flush button 15a is pressed down at timing T1, the control unit 100 operates the pump 42 at the rotation speed R1 with the switching valve device 46 communicating the communication pipe 44 with the branch pipes 48a, 48c between timings T1 and T2. At the rotation speed R1, flush water flows through the toilet bowl 22 so as not to flow beyond the rear end 36a of the drainage flow path 36 into the first drain pipe 37. The rotation speed R1 is a rotation speed at which no siphon action occurs in the drainage flow path 36. As a result, flush water is supplied from the water discharge nozzles 50, 52 into the toilet bowl 22 between timings T1 and T2 without causing a siphon action in the drainage flow path 36. As a result, the level of flush water rises to the second water surface WS2 as shown in FIG. 15.

[0051] Next, from timing T3 to T4, the control unit 100 operates the pump 42 at rotation speed R2 with the switching valve device 46 connecting the connecting pipe 44 to all of the branch pipes 48a, 48b, 48c, and 48d. As shown in FIG. 14, the rotation speed R2 is greater than the rotation speed R1. The rotation speed R2 is the rotation speed at which the siphoning action occurs in the drainage flow path 36. Because the siphoning action occurs in the drainage flow path 36 from timing T3 to T4, a large amount of flush water in the toilet bowl 22 and the drainage flow path 36 can be discharged together with waste into the external drain pipe.

[0052] Before discharging flush water at times T3 to T4, control unit 100 supplies flush water from water-discharging nozzles 50, 52 to toilet bowl 22 at times T1 to T2. This allows waste adhering to the surface of toilet bowl 22 to be flushed into water collection section 24 by flush water from water-discharging nozzles 50, 52, and then the flush water can be discharged into an external drain pipe together with the waste in water collection section 24. Furthermore, the supply of flush water from water-discharging nozzles 50, 52 at times T1 to T2 causes the water level of flush water in drainage flow path 36 to rise to second water level WS2, so that a large amount of flush water can be used at times T3 to T4 to reliably discharge waste.

[0053] When flush water is discharged from the reservoir 24 and the drainage flow path 36 at timings T3 to T4, the flush water level drops to the bottom end B1 of the drainage flow path 36. That is, almost no flush water remains in the drainage flow path 36. The control unit 100 operates the pump 42 at the rotation speed R3 with the communication pipe 44 in communication with the branch pipe 48d by the switching valve device 46 from timings T4 to T6. The rotation speed R3 is smaller than the rotation speeds R1 and R2. The rotation speed R3 is a rotation speed at which flush water is stored up to the third water surface WS3. In other words, the rotation speed R3 is a rotation speed at which no siphon action occurs in the drainage flow path 36. Therefore, the flush water in the drainage flow path 36 is not discharged to the outside, and the flush water can be stored in the drainage flow path 36 early. This makes it possible to shorten the period during which water runs out. As shown in FIG. 14, even when cleaning water is supplied to the toilet bowl 22 through the same water-discharging nozzles 50, 52, the rotation speed R1 when cleaning the toilet bowl 22 through the water-discharging nozzles 50, 52 is greater than the rotation speed R3 when storing the cleaning water in the drainage flow path 36 through the water-discharging nozzles 50, 52.

[0054] When the pump 42 operates at the rotation speed R3 from timings T4 to T6, flush water is stored above the center C1 of the drainage flow path 36 in the longitudinal direction D2 of the drainage flow path 36, which extends upward from the lower end B1 toward the rear end 36a. By storing flush water above the center C1, the control unit 100 can reliably seal the drainage flow path 36.

[0055] After discharging flush water from the water storage section 24 and the drainage flow path 36 at the rotation speed R3 (T4), the control section 100 operates the pump 42 at the rotation speed R3 with the communication pipe 44 communicating with the branch pipe 48d. As shown in FIG. 15, the water discharge opening 54, which communicates with the branch pipe 48d via the supply flow path 70, is located closer to the drainage flow path 36 than the water discharge nozzles 50, 52 and the spreader 60. Therefore, the flush water discharged from the water discharge opening 54 reaches the drainage flow path 36 in a shorter time than the flush water discharged from the water discharge nozzles 50, 52 and the spreader 60. As a result, the drainage flow path 36 is sealed in a short time, so the period during which the drainage flow path 36 is sealed off can be shortened.

[0056] In the toilet device 10 of this embodiment, the control unit 100 causes the communication pipe 44 to communicate with the branch pipes 48a, 48c by the switching valve device 46 while operating the pump 42 at the rotation speed R3 at timing T5 between timings T4 and T6. After disconnecting the communication pipe 44 from the branch pipe 48d at timing T6, the control unit 100 operates the pump 42 at the rotation speed R3 while keeping the communication pipe 44 in communication with the branch pipes 48a, 48c until timing T7. This causes the flush water level to return to the first water level WS1. The control unit 100 discharges flush water from the water discharge nozzles 50, 52 over the period from timings T5 to T6 among the timings T4 to T6 during which the pump 42 is operated at the rotation speed R3. During the period from timings T5 to T6, flush water is supplied to the drainage flow path 36 from the water discharge nozzles 50, 52 in addition to the water discharge opening 54. This makes it possible to shorten the period during which water seal failure occurs in the drainage flow path 36, compared to a configuration in which flush water is supplied to the drainage flow path 36 only from the water discharge opening 54 from timings T4 to T6. In a modified example, the control unit 100 may operate the pump 42 at the rotation speed R3 from timings T4 to T6, and then operate the pump 42 at a rotation speed greater than the rotation speed R3 from timings T6 to T7. That is, in this modified example, the rotation speed R3 for storing flush water in the drainage flow path 36 via the water discharge opening 54 may be smaller than the rotation speed for storing flush water in the drainage flow path 36 via the water discharge nozzles 50, 52.

[0057] In the toilet apparatus 10, the rate of change in cross-sectional area and the rate of change in height increase between the cross-section EE and the cross-section FF. This allows for greater freedom in the shape of the second flow path 80 compared to conventional techniques in which the cross-sectional area of ​​the flow path decreases toward the downstream side. In other words, it allows for greater freedom in the manufacturing process of the toilet body 20.

[0058] (Correspondence) The second flow path 80 is an example of a "flow path". The cross-sectional shape of cross section EE is an example of a "first cross-sectional shape". The cross-sectional shape of cross section FF is an example of a "second cross-sectional shape". The side surface 26 is an example of a "toilet bowl surface". The drain port 34 is an example of a "rear end of the boundary portion". The cross-sectional shape of cross section CC is an example of a "third cross-sectional shape". The cross-sectional shape of cross section DD is an example of a "fourth cross-sectional shape". The rotation speed R2 is an example of a "first rotation speed". The rotation speed R3 is an example of a "second rotation speed". The water discharge nozzles 50, 52 are examples of an "upper flow path". The period between timings T4 and T6 is an example of a "first period". The period between timings T5 and T6 is an example of a "second period".

[0059] Aspects of the technology disclosed in this specification are listed below.

[0060] The first aspect is a toilet device. The toilet device may include a toilet bowl having a water storage section located below, and a flow path having a water outlet at least a portion of which is submerged in the water storage section, the flow path being disposed below the toilet bowl and flowing flush water along a flow direction toward the water outlet. The flow path may have a first cross-sectional shape that is the cross-sectional shape of the flow path in a first plane perpendicular to the flow direction at an intermediate position of the flow path, and a second cross-sectional shape that is the cross-sectional shape of the flow path in a second plane perpendicular to the flow direction downstream of the first plane. The vertical length of the second cross-sectional shape may be longer than the vertical length of the first cross-sectional shape, and the area of ​​the second cross-sectional shape may be larger than the area of ​​the first cross-sectional shape.

[0061] In a second aspect, in the first aspect, at least a portion of a periphery of the first cross-sectional shape may be defined by a barrier that blocks a portion of the flow path at the intermediate position.

[0062] In a third aspect, in the second aspect, the barrier may extend downward from an upper end of the flow channel.

[0063] In a fourth aspect, in any one of the second to third aspects, an adhesive layer is arranged downstream of the barrier of the flow path between an upper wall that defines the upper edge of the flow path and a pair of side walls that define the left and right edges of the flow path, and upstream of the barrier of the flow path, the adhesive layer may not be arranged between the upper wall and the pair of side walls of the flow path.

[0064] In a fifth aspect, in any one of the second to fourth aspects, the toilet apparatus may further include a drainage passageway communicating with the toilet bowl. The barrier may be located forward of a rear end of a boundary between the toilet bowl and the drainage passageway.

[0065] In a sixth aspect, in any one of the first to fifth aspects, an area of ​​the second cross-sectional shape may be two or more times the area of ​​the first cross-sectional shape.

[0066] In a seventh aspect, in any one of the first to sixth aspects, an upper wall that defines an upper edge of the flow path may form a surface of the toilet bowl.

[0067] In an eighth aspect, in the seventh aspect, the upper wall of the flow path may be displaced upwardly towards the outside of the toilet apparatus in a cross section of the flow path in a plane perpendicular to the flow direction.

[0068] In a ninth aspect, in any one of the first to eighth aspects, the flow path may further have a third cross-sectional shape that is a cross-sectional shape of the flow path in a third plane perpendicular to the flow direction, and a fourth cross-sectional shape that is a cross-sectional shape of the flow path in a fourth plane downstream of the third plane and perpendicular to the flow direction. A vertical length of the third cross-sectional shape may be longer than a vertical length of the fourth cross-sectional shape, and an area of ​​the third cross-sectional shape may be smaller than an area of ​​the fourth cross-sectional shape.

[0069] In a tenth aspect, in any one of the first to ninth aspects, the toilet apparatus may further include a drainage flow path communicating with the toilet bowl, a pump that supplies the flush water to the drainage flow path, and a control unit that controls the rotation speed of the pump to send out the flush water. The drainage flow path may extend upward from the bottom of the toilet bowl, and the control unit may operate the pump at a first rotation speed to discharge the flush water in the drainage flow path, and then operate the pump at a second rotation speed lower than the first rotation speed for a first period of time.

[0070] In an eleventh aspect, in the tenth aspect, the first rotation speed may be a rotation speed at which a siphon effect occurs in the drainage flow path, and the second rotation speed may be a rotation speed at which the siphon effect does not occur in the drainage flow path.

[0071] In a 12th aspect, in any one of the 10th to 11th aspects above, the second rotation speed may be a rotation speed for storing the cleaning water in the drainage flow path up to a position above the center of the section extending upward from the bottom of the drainage flow path in the longitudinal direction of the section.

[0072] In a thirteenth aspect, in any one of the tenth to twelfth aspects, the toilet apparatus may further include an upper flow path that discharges the flush water to an upper portion of the toilet bowl. The flush water may be discharged from the upper flow path to the upper portion of the toilet bowl for at least a second period while the pump is operating at the second rotation speed.

[0073] Specific examples of the technology disclosed in this specification have been described above in detail. These are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes to the specific examples exemplified above. Modifications of the above embodiment are listed below.

[0074] (1) The position of the water discharge opening 54 does not have to face the drain outlet 34. For example, the water discharge opening 54 may open into the toilet bowl 22 on one of the left and right sides of the water collecting section 24. A part of the water discharge opening 54 may be located above the first water surface WS1.

[0075] (2) The second flow passage 80 does not have to have the barrier 89. For example, the upper edge of the second flow passage 80 may have a section that gradually displaces downward toward the downstream side and then gradually displaces upward.

[0076] (3) The barrier wall 89 does not have to extend downward from the upper wall 83. For example, the barrier wall 89 may be a wall extending inwardly of the upstream portion 82 from the pair of side walls 85L, 85R.

[0077] (4) The lid portion 87 may define the upper edge of the upstream portion 82. That is, on the upstream side of the reduced diameter portion 84, an adhesive layer 88 may be disposed between the lid portion 87 and the pair of side walls 85L, 85R.

[0078] (5) The reduced diameter portion 84 may be located deeper than the drain outlet 34 .

[0079] (6) The upper wall 83 of the upstream portion 82 does not have to form the side surface 26 of the toilet bowl 22. In this modification, the flow path cross section of the second flow path 80 may be, for example, rectangular. In other words, the upper wall 83 does not have to be displaced upward toward the outside of the toilet apparatus 10.

[0080] (7) The control unit 100 may operate the pump 42 at the rotation speed R2 with the communicating pipe 44 communicating with the branch pipes 48a, 48c from timing T4 to T6. In other words, the control unit 100 may supply wash water to the drainage flow path 36 from the water discharge nozzles 50, 52 from timing T4 to T6.

[0081] (8) The rotation speed R3 may be a rotation speed at which cleaning water is stored below the center C1 in the longitudinal direction D2 of the drainage flow path 36. The rotation speed R3 may be any rotation speed that can store cleaning water up to a height at which the drainage flow path 36 is sealed.

[0082] (9) The control unit 100 does not have to supply wash water from the water discharge nozzles 50, 52 over the period from timing T5 to T6.

[0083] The technical elements described in the specification and / or drawings exhibit technical utility alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. The technologies illustrated in the specification and / or drawings can achieve multiple objectives simultaneously, and achieving one of these objectives is itself technically useful. [Explanation of symbols]

[0084] 10: toilet device, 12: toilet part, 14: toilet seat, 14a: opening, 15: operating device, 15a: large flush button, 15b: small flush button, 15d: display, 16: function part, 17: water level sensor, 18: reservoir, 19: opening / closing valve, 20: toilet body, 22: toilet bowl, 22a: upper edge, 23: front surface, 23a, 25a, 26a: straight shape, 23b, 25b, 25c, 26b, 26c: curved shape, 24: water storage part, 25: rear surface, 26: side surface, 30: upper rim part, 30a: underside, 34: drain, 36: drain flow path, 36a: rear end, 37: first drain pipe, 38: second drain pipe , 40: discharge portion, 42: pump, 44: communicating pipe, 45: check valve, 46: switching valve device, 48a, 48b, 48c, 48d: branch pipe, 50, 52: discharge nozzle, 50a: opening, 54: discharge opening, 60: spreader, 70: supply flow path, 72: connection portion, 74: first flow path, 80: second flow path, 82: upstream portion, 84: reduced diameter portion, 85L, 85R: side wall, 85B: bottom wall, 86: downstream portion, 87: lid portion, 88: adhesive layer, 89: barrier, 90: seating sensor, 100: control portion, WS1: first water surface, WS2: second water surface, WS3: third water surface, C1: center, D1: flow direction, D2: longitudinal direction

Claims

1. A toilet bowl having a water collecting portion located below; a flow path having a water outlet at least a portion of which is submerged in the water pool, the flow path being disposed below the toilet bowl and directing flush water in a flow direction toward the water outlet; Equipped with The flow path is a first cross-sectional shape that is a cross-sectional shape of the flow path in a first plane perpendicular to the flow direction at an intermediate position of the flow path; a second cross-sectional shape that is a cross-sectional shape of the flow passage in a second plane that is downstream of the first plane and perpendicular to the flow direction; having The length of the second cross-sectional shape in the up-down direction is longer than the length of the first cross-sectional shape in the up-down direction, The area of ​​the second cross-sectional shape is greater than the area of ​​the first cross-sectional shape. Toilet device.

2. 2. The toilet apparatus of claim 1, wherein at least a portion of a periphery of the first cross-sectional shape is defined by a barrier that blocks a portion of the flow path at the intermediate position.

3. 3. The toilet apparatus of claim 2, wherein the barrier extends downwardly from an upper end of the flow passage.

4. an adhesive layer is disposed downstream of the barrier of the flow path between an upper wall that defines an upper end edge of the flow path and a pair of side walls that define left and right end edges of the flow path; The adhesive layer is not disposed between the upper wall and the pair of side walls of the flow path upstream of the barrier of the flow path.

3. The toilet apparatus of claim 2.

5. The toilet apparatus further includes a drainage passage communicating with the toilet bowl, The toilet apparatus according to claim 2 , wherein the barrier is located forward of a rear end of a boundary portion between the toilet bowl and the drainage flow path.

6. The area of ​​the second cross-sectional shape is at least twice the area of ​​the first cross-sectional shape.

2. The toilet apparatus of claim 1.

7. 2. The toilet apparatus of claim 1, wherein a top wall defining an upper edge of the flow passage forms a surface of the toilet bowl.

8. 8. The toilet device according to claim 7, wherein in a cross section of the flow channel in a plane perpendicular to the flow direction, the upper wall of the flow channel is displaced upwards towards the outside of the toilet device.

9. The flow path further comprises: a third cross-sectional shape that is a cross-sectional shape of the flow path in a third plane perpendicular to the flow direction; a fourth cross-sectional shape that is a cross-sectional shape of the flow passage in a fourth plane that is downstream of the third plane and perpendicular to the flow direction; having The third cross-sectional shape has a vertical length longer than the vertical length of the fourth cross-sectional shape, The area of ​​the third cross-sectional shape is smaller than the area of ​​the fourth cross-sectional shape.

2. The toilet apparatus of claim 1.

10. The toilet device further comprises: A drainage flow path communicating with the toilet bowl; a pump for supplying the cleaning water to the drainage flow path; A control unit that controls the rotation speed of the pump to pump out the cleaning water; Equipped with The drainage passage extends upward from the bottom of the toilet bowl, the control unit operates the pump at a first rotation speed to discharge the cleaning water in the drainage flow path, and then operates the pump at a second rotation speed lower than the first rotation speed for a first period of time.

2. The toilet apparatus of claim 1.

11. The first rotation speed is a rotation speed at which a siphon effect occurs in the drainage flow path, The second rotation speed is a rotation speed at which the siphon effect does not occur in the drainage flow path.

11. A toilet apparatus according to claim 10.

12. The second rotation speed is a rotation speed for storing the flush water in the drainage flow path up to a position above the center of the section in the longitudinal direction of the section extending upward from the bottom of the drainage flow path.

11. A toilet apparatus according to claim 10.

13. The toilet apparatus further includes an upper flow path that discharges the flush water to an upper portion of the toilet bowl, the flush water is discharged from the upper flow path to the upper part of the toilet bowl for at least a second period while the pump is operating at the second rotation speed.

11. A toilet apparatus according to claim 10.

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