Toilet device

Abstract

To provide a technique capable of suppressing decrease in a cleaning water flow rate.SOLUTION: A toilet device includes: a toilet bowl body having a toilet bowl; and a discharge part that allows cleaning water to flow from a discharge port onto a surface of the toilet bowl. The cleaning water may be flowed at a surface flow velocity of 0.5 m / s or more.SELECTED DRAWING: Figure 3

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 having a spiral guide channel that controls the direction of water flowing inside the bowl. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-265693 A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to clean dirt from within the toilet bowl, it is preferable that the flow rate of flush water is high. This specification provides a technique for suppressing a decrease in the flow rate of flush water. [Means for solving the problem]

[0005] In a first aspect of the technology disclosed in this specification, a toilet apparatus comprises a toilet body having a toilet bowl, and a discharge part that flows cleaning water onto the surface of the toilet bowl, and the discharge part may flow the cleaning water such that the flow velocity on the surface of the cleaning water is 0.5 m / s or more.

[0006] In a second aspect, in the first aspect, the discharge section may discharge flush water such that the thickness of the flush water flowing over the surface of the toilet bowl in a specific area is 5.0 mm or less.

[0007] In a third aspect, in any one of the first and second aspects above, the discharge section may flow the cleaning water in a specific area such that the flow velocity of the surface of the cleaning water at a position 1.0 mm from the surface of the toilet bowl is 0.5 m / s or more.

[0008] In a fourth aspect, in any one of the first to third aspects, the discharge portion may discharge the flush water at an angle of from 0° to 30° toward the surface of the toilet bowl.

[0009] In a fifth aspect, in any one of the first to fourth aspects above, the discharge section may have a discharge port that is positioned on either the left or right side of the left-right center of the toilet bowl, and the flushing water flowing to the other left or right side of the left-right center of the toilet bowl may have a flow velocity on the surface of the flushing water of 0.5 m / s or more.

[0010] In a sixth aspect, in any one of the first to fifth aspects above, the discharge section may flow the flushing water so that a flow velocity on the surface of the flushing water is maintained at 0.5 m / s or more up to the water level of the water in the toilet bowl.

[0011] In a seventh aspect, in any one of the first to sixth aspects, the discharge portion may discharge the cleaning water downward.

[0012] In an eighth aspect, in any one of the first to seventh aspects, the discharge portion may discharge flushing water in a direction along an upper edge of the toilet bowl so that the flushing water flows along the upper edge.

[0013] In a ninth aspect, in any one of the first to eighth aspects above, the toilet body has a drainage section recessed downward from the bottom of the toilet bowl, and the toilet bowl has, in the vertical direction, a water storage area from the upper end of the drainage section to the water level of the stored water in the toilet bowl, and an upper area from the upper end of the water storage area to the upper edge of the toilet bowl, and in a cross section perpendicular to the left-right direction at the center of the left-right direction of the toilet bowl, the surface of the upper area forward of the water storage area may be configured with at least one of a downwardly curved shape and a straight line shape sloping downward toward the water level of the stored water.

[0014] In a tenth aspect, in any one of the first to ninth aspects above, when the toilet bowl is viewed from above, the ratio of a first area of ​​the water surface of the water stored in the toilet bowl to a second area of ​​the water other than the water surface may be 4:6 to 10:0.

[0015] In an eleventh aspect, in any one of the first to tenth aspects above, the discharge section may discharge cleaning water in a plurality of directions to flow the cleaning water onto the surface of the toilet bowl, and may flow the cleaning water onto the surface of the toilet bowl by at least one of using the pressure of the cleaning water supplied from a supply pipe extending from the clean water path to cause the cleaning water to flow onto the surface of the toilet bowl, and discharging cleaning water in a first direction of the plurality of directions to flow the cleaning water onto a first area of ​​the surface of the toilet bowl, and discharging in a second direction of the plurality of directions to flow the cleaning water onto a second area of ​​the surface of the toilet bowl different from the first area.

[0016] Details and further improvements of the technology disclosed in this specification are described in the following "Description of Embodiments of the Invention". [Brief description of the drawings]

[0017] [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] FIG. 3 is an end view of the toilet bowl taken along line III-III of FIG. 2. [Figure 4] 4 shows a cross-sectional view of the inside of the toilet bowl and the upper flange portion taken along the line IV-IV in FIG. 2. [Diagram 5] FIG. 1 is a plan view of a toilet body and a toilet seat according to a first embodiment. [Figure 6] FIG. 1 is a plan view of a toilet body according to a first embodiment. [Figure 7] FIG. 2 shows a plan view of the toilet body illustrating the first region of the first embodiment. [Figure 8]FIG. 2 shows a plan view of the toilet body illustrating the second region of the first embodiment. [Figure 9] FIG. 4 shows a plan view of the toilet body illustrating a third region of the first embodiment. [Figure 10] 4A to 4C are diagrams for explaining the direction of cleaning water discharged from a discharge port in the first embodiment. [Figure 11] 4A to 4C are diagrams for explaining the direction of cleaning water discharged from a discharge port in the first embodiment. [Figure 12] 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. [Figure 13] FIG. 2 is a schematic block diagram of a discharge section according to the first embodiment. [Figure 14] FIG. 13 is a schematic block diagram of a discharge section according to a second embodiment. [Figure 15] 13A and 13B are diagrams for explaining the direction of cleaning water discharged from a discharge port in the third embodiment. [Figure 16] 13 shows an enlarged cross-sectional view of a region AR in FIG. 12 according to a modified example. [Figure 17] 13 shows an enlarged cross-sectional view of a region AR in FIG. 12 according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] (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.

[0019] The toilet device 10 comprises a toilet portion 12, a toilet seat 14, a functional portion 16, a tank 18 (see FIG. 2), and a discharge portion 40 (see FIG. 13). As shown in FIG. 1, the toilet portion 12 comprises a toilet body 20 and an upper end flange portion 30. The toilet body 20 is made of ceramic. The toilet body 20 comprises a toilet bowl 21 that receives waste. The toilet body 20 accommodates a tank 18 below the toilet bowl 21. The tank 18 stores flushing water for flushing the toilet bowl 21. The toilet device 10 comprises a flush button (not shown) electrically connected to the tank 18. When the flush button is operated by a user, flushing water is discharged from the tank 18 via the discharge portion 40 into the toilet bowl 21. The functional portion 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, a deodorizing function, and the like.

[0020] In the toilet apparatus 10, flush water in the tank 18 may be supplied to the toilet bowl 21 by operating a lever arranged on the toilet apparatus 10, in addition to operating a flush button. The flush button may be arranged on a remote controller that is electrically connected to the tank 18 either wired or wirelessly. Flush water in the tank 18 may be supplied to the toilet bowl 21 even without operation by the user. For example, flush water in the tank 18 may be supplied to the toilet bowl 21 when the user is not detected by the sensor.

[0021] The toilet seat 14 is attached to the toilet 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.

[0022] 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 in 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 back 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 tank 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.

[0023] The toilet bowl 21 has a shape that is generally recessed downward. The toilet body 20 includes a drainage section 32 disposed at the lower end of the toilet bowl 21, a drainage pipe 36 that communicates with the drainage section 32, and a drainage outlet 34 that opens into the drainage section 32. The drainage section 32 is recessed downward from the lower end 21u of the toilet bowl 21. The drainage section 32 communicates with the drainage pipe 36 via the drainage outlet 34. The drainage pipe 36 extends upward from the drainage outlet 34. The drainage section 32 bends downward at a curved position 36a and extends downward. The drainage pipe 36 extends to the outside of the toilet portion 12.

[0024] The drain outlet 34 is disposed behind the opening 14a of the toilet seat 14 in the front-to-rear direction. The drain outlet 34 may be disposed behind 3 / 8 of the area from the rear end of the opening 14a of the toilet seat 14 when the opening 14a of the toilet seat 14 is divided into eight equal parts in the front-to-rear direction (see FIG. 2). The drain outlet 34 may be disposed behind the position into which feces excreted by the user falls.

[0025] At the top end of the toilet bowl 21, an upper edge 21e that defines the upper end of the toilet bowl 21 goes all the way around. An upper end flange portion 30 is arranged. The upper end flange portion 30 is placed on the upper end of the toilet body 20. At the top end of the toilet bowl 21, the upper end flange portion 30 goes all the way around the upper edge 21e of the toilet bowl 21. The upper end flange portion 30 protrudes inward from the upper edge 21e of the toilet bowl 21 so as to face the surface of the toilet bowl 21. The lower surface 30a of the upper end flange portion 30 is arranged parallel to the front-to-rear and left-to-right directions.

[0026] (Toilet bowl shape) Flush water supplied to toilet bowl 21 is stored in toilet bowl 21. The stored water accumulates up to curved position 36a of drain pipe 36. The surface of toilet bowl 21 has stored water area 21b below water level WF of the stored water, and upper area 21c above water level WF.

[0027] As shown in FIG. 6, the upper region 21c goes around the periphery of the water surface WF above the water surface WF. The upper region 21c includes a front region 22, a side region 26, and a rear region 24. The front region 22 is an area depicted by a plurality of dots in FIG. 6. The front region 22 is an area in front of the front end WF1 of the water surface WF. The side region 26 is colored gray in FIG. 6 and is an area extending rearward from the rear end of the front region 22 along both the left and right ends of the water surface WF. The side region 26 extends to the rear end WF2 of the water surface WF. The rear region 24 is depicted by a plurality of parallel horizontal lines in FIG. 6 and is an area connecting the rear ends of the side regions 26 on both the left and right sides along the rear end WF2 of the water surface WF.

[0028] FIG. 2 shows a cross-sectional view perpendicular to the left-right direction at the center of the left-right direction of the toilet bowl 21. In the cross-sectional view perpendicular to the left-right direction at the center of the left-right direction of the toilet bowl 21, the front region 22 has a linear shape 22a that slopes backward, i.e., toward the water surface WF, as it proceeds downward from the upper edge 21e, and a curved shape 22b that curves downward from the lower end of the linear shape 22a to the water surface WF, i.e., the lower end of the upper region 21c. 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 22a extends in the tangential direction of the curved shape 22b. The boundary between the linear shape 22a and the curved shape 22b is smooth and continuous without any step. As shown in FIG. 3, the front region 22 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 same is true for front region 22 in a cross section perpendicular to the left-right direction at any position in the left-right direction of toilet bowl 21. Front region 22 does not have a shape that bulges upward.

[0029] In a cross section perpendicular to the left-right direction at the left-right center of toilet bowl 21, water collecting area 21b located below front area 22 has a linear shape that slopes downward and rearward, that is, toward water surface WF.

[0030] The linear shape 22a has a plane that slopes downward from the upper edge 21e toward the water surface WF in a cross section perpendicular to the front-rear direction at any position in the front-rear direction. The curved shape 22b curves downward from the lower end of the linear shape 22a to the water surface WF, i.e., the lower end of the upper region 21c in a cross section perpendicular to the front-rear direction at any position in the front-rear direction.

[0031] In a modified example, in a cross section perpendicular to the left-right direction at the center of the left-right direction of the toilet bowl 21, the front region 22 may have a shape other than the linear shape 22a and the curved shape 22b. For example, the front region 22 may have a linear shape 22a, a curved shape that curves downward at an intermediate position from the lower end of the linear shape 22a to the water surface WF, and a linear shape that slopes toward the water surface WF as it progresses downward from the lower end of the curved shape to the water surface WF. For example, the front region 22 may have a curved shape that curves downward from the upper end edge 21e. In the front region 22, curved shapes with different curvatures may be arranged continuously. The front region 22 may be composed of only one of the linear shape 22a and the curved shape 22b. The same applies to the front region 22 in a cross section perpendicular to the front-rear direction. When the front region 22 is composed of only the curved shape 22b and the water storage region 21b is composed of a linear shape, the radius of curvature of the front region 22 is smaller than the radius of curvature of the water storage region 21b. In a modified example, water collection region 21b located below front region 22 may have a curved shape that curves downward in a cross section perpendicular to the left-right direction at the left-right center of toilet bowl 21. In this case, the radius of curvature of front region 22 in a cross section perpendicular to the left-right direction at the left-right center of toilet bowl 21 may be smaller than or equal to the radius of curvature of water collection region 21b.

[0032] As shown in FIG. 3, the side region 26 has a curved shape that continues from the front region 22 and curves downward in a cross section perpendicular to the front-rear direction in the front portion. The curved shape extends downward beyond the water surface WF to the water pooling region 21b. As shown in FIG. 4, the side region 26 has a straight line shape 26a that slopes downward from the upper end edge 21e toward the water surface WF in the rear portion in a cross section perpendicular to the front-rear direction, a curved shape 26b that curves downward at an intermediate position between the lower end of the straight line shape 26a and the water surface WF, and a curved shape 26c that curves upward from the lower end of the curved shape 26b to the water surface WF. The curved shape 26c extends beyond the water surface WF to the water pooling region 21b. The portion that has the curved shape 26c is the rear portion, and the portion that does not have the curved shape 26c is the front portion. The boundary between the front portion and the rear portion may be the front end of the drainage section 32.

[0033] In a modified example, the side region 26 may be configured with at least one of the straight shape 26a and the curved shape 26b over the entirety, and may not have the curved shape 26c. In this case, the water storage region 21b below the side region 26 may have a curved shape that curves upward.

[0034] 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 21, the rear region 24 has a straight line shape 24a that slopes downward from the upper edge 21e toward the front, i.e., toward the water surface WF, a curved shape 24b that curves downward at an intermediate position between the bottom end of the straight line shape 24a and the water surface WF, and a curved shape 24c that curves upward from the bottom end of the curved shape 24b to the water surface WF. The straight line shape 24a may be parallel to the up-down direction. The rear region 24 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 region 24.

[0035] (State of accumulated water) The water surface WF of the water stored in the toilet bowl 21 is stable at the same height as the lower end of the curved position 36a where the drain pipe 36 extends upward and bends downward. As shown in FIG. 6, when the toilet body 20 is observed from above in a state where the water is stable, inside the upper flange portion 30, the ratio of the area of ​​the water surface WF to the area other than the water surface WF, i.e., the area of ​​the upper region 21c when viewed from above, is 4:6. In a modified example, the area of ​​the water surface WF may be larger than the area other than the water surface WF, i.e., the ratio of the area of ​​the water surface WF to the area other than the water surface WF is 4:6. For example, the ratio of the area of ​​the water surface WF to the area other than the water surface WF may be between 4:6 and 10:0. Inside the upper edge 21e of the toilet bowl 21, the ratio of the area of ​​the water surface WF to the area other than the water surface WF may be between 4:6 and 10:0.

[0036] As shown in Fig. 12, the pooled water fills from pooled water area 21b of toilet bowl 21 to the bottom surface of drainage section 32. In a cross section perpendicular to the left-right direction at the left-right center of toilet bowl 21, at any point between 1 / 8 and 3 / 8 of the way from the rear end of opening 14a when opening 14a is divided into eight equal parts in the front-to-rear direction, a vertical distance D1 from the top end of toilet body 20, i.e., the top end of upper flange portion 30, to the bottom surface of toilet body 20 located vertically downward, i.e., a position P between either the bottom end of toilet bowl 21 or the bottom surface of drainage section 32, is equal to a front-to-rear distance D2 from position P to the front edge F of the pooled water. In a modified example, distance D1 may be less than distance D2.

[0037] As shown in Fig. 5, when the toilet seat 14 is placed on top of the toilet body 20 and the toilet body 20 is observed from above, at the opening of the toilet seat 14, the area of ​​the water surface WF is larger than the area of ​​the water surface WF: the area other than the water surface WF = 5:5. In a modified example, the area of ​​the water surface WF may be larger than the area other than the water surface WF, i.e., the area of ​​the water surface WF: the area other than the water surface WF = 5:5. For example, the area of ​​the water surface WF: the area other than the water surface WF = may be between 5:5 and 10:0.

[0038] (Configuration of the discharge section) The discharge unit 40 discharges flush water in the tank 18 into the toilet bowl 21. As shown in FIG. 13, the discharge unit 40 includes a pump 52, a switching valve 54, a plurality of communication pipes 56a, 56b, 56c, 56d, and a plurality of discharge ports 42, 44, 46, 48. FIG. 13 shows the connection state of each of the parts 42, 44, 46, 48, 52, 54, 56a, 56b, 56c, 56d included in the discharge unit 40. FIG. 13 shows the positions of the discharge ports 42, 44, 46, 48. FIG. 13 does not show the configuration of the discharge ports 42, 44, 46, 48. When flush water in the tank 18 is discharged into the toilet bowl 21, the pump 52 sucks flush water from the tank 18. The pump 52 pressurizes the flush water and sends it to the switching valve 54. The switching valve 54 connects the pump 52 to any one of a plurality of connecting pipes 56a, 56b, 56c, 56d, thereby sending flush water from the pump 52 to the connecting pipe that connects to the pump 52. The pump 52 and the switching valve 54 are disposed behind the toilet body 20.

[0039] When flushing water, initially, the switching valve 54 maintains a state in which the pump 52 communicates with the communicating pipe 56b that communicates with the discharge port 44 located on the left side, and maintains a state in which the pump 52 does not communicate with the communicating pipes 56a, 56c, 56d that communicate with the other discharge ports 42, 46, 48. Flush water pressurized by the pump 52 passes through the communicating pipe 56b and is discharged from the discharge port 44 into the toilet bowl 21.

[0040] As shown in FIG. 10, the discharge port 44 is disposed at the tip of the nozzle 45 having a shape that expands in both the up-down direction from the communication pipe 56b. As shown in FIG. 4, the toilet body 20 has a tubular opening 44a that extends from the rear to the front along the inner surface of the toilet bowl 21. The nozzle 45 is disposed within the opening 44a. The discharge port 44 has an elongated shape that extends in the up-down direction. The ratio of the length of the discharge port 44 in the longitudinal direction to the length of the short side is 1:4. The ratio of the length of the discharge port 44 in the longitudinal direction to the length of the short side may be either 1:2 or 1:3. The opening 44a has an elongated shape that extends in the up-down direction. The ratio of the length of the discharge port 44 in the longitudinal direction to the length of the short side is 1:4. The ratio of the length of the discharge port 44 in the longitudinal direction to the length of the short side may be either 1:2 or 1:3. As shown in FIG. 10, the flush water that has passed through the communicating pipe 56b and reached the nozzle 45 spreads in the vertical direction according to the shape of the nozzle 45, as indicated by the arrows. As a result, the flush water discharged from the discharge port 44 flows straight from the discharge port 44 in parallel to the front-rear direction, and also spreads upward and downward. The flush water flowing upward comes into contact with the upper end flange portion 30 and flows forward along the upper end edge 21e of the toilet bowl 21 along the upper end flange portion 30. As shown in FIG. 11, the flush water is discharged from the discharge port 44 approximately parallel to the side region 26, as indicated by the arrows. Approximately parallel may be parallel to the side region 26, i.e., 0°. The state in which the flush water is discharged approximately parallel includes a state in which the flow direction of the flush water discharged toward the side region 26 is discharged at an angle of 30° or less to the side region 26. With this configuration, it is possible to suppress a reduction in the pressure of the flush water discharged from the discharge port 44 due to collision with the side region 26. It is possible to suppress a decrease in the flow rate of the flush water discharged from the discharge port 44. The discharge port 44 is disposed on the inner circumferential surface of the toilet bowl 21.

[0041] As shown in FIG. 7, flush water discharged from outlet 44 flows into first region 21x of upper region 21c of toilet bowl 21. First region 21x, represented by multiple parallel diagonal lines, reaches upper edge 21e from outlet 44 to the front end of toilet bowl 21. In other words, flush water flowing through first region 21x flows from outlet 44 to the front end of toilet bowl 21 onto the underside of upper flange portion 30. This allows flush water flowing through first region 21x to clean the underside of upper flange portion 30 on the left side. The bottom end of first region 21x reaches water surface WF of the collected water. First region 21x extends beyond the front end of toilet bowl 21 to the right side.

[0042] The shape and direction of outlet 44 and the pressure of the flush water by pump 52 are adjusted so that the flush water discharged from outlet 44 is maintained at 5.0 mm or less over the entire area of ​​first region 21x. Pump 52 increases the pressure so that the flow speed of the flush water flowing through first region 21x is at least instantaneously 0.5 m / s or more over the entire area of ​​first region 21x at a position 1.0 mm from the surface of toilet bowl 21. The flow speed of the flush water in the thickness direction of the flush water is slowest at the surface of toilet bowl 21 and gradually increases the further away from toilet bowl 21. For this reason, flush water that is 0.5 m / s or more at a position 1.0 mm from the surface of toilet bowl 21 is also 0.5 m / s or more on the surface of the flush water.

[0043] The switching valve 54 switches from a state in which the connecting pipe 56b communicating with the discharge port 44 located on the left side is connected to the pump 52 to a state in which the connecting pipe 56b is not connected to the pump 52. The switching valve 54 then maintains a state in which the connecting pipe 56a communicating with the discharge port 42 located on the rear side is connected to the pump 52, and the other connecting pipes 56b, 56c, 56d are not connected to the pump 52. Flush water pressurized by the pump 52 passes through the connecting pipe 56a and is discharged from the discharge port 42 into the toilet bowl 21.

[0044] The discharge port 42 is disposed at the upper end of the rear region 24. A spreader 42a is disposed at the discharge port 42. The spreader 42a has a plate-like member disposed in front of the discharge port 42 with a gap through which the wash water can pass. The wash water discharged from the discharge port 42 collides with the spreader 42a, and thereby spreads and flows in the vertical and horizontal directions.

[0045] As shown in FIG. 9, the flush water discharged from the discharge port 42 flows into the third region 21z, which covers the entire rear region 24. The lower end of the third region 21z reaches the water surface WF of the pooled water. The upper end of the third region 21z reaches the lower surface of the upper end flange portion 30. The third region 21z extends beyond the rear region 24 in both the left and right directions. The third region 21z has a region 21q at the rear end of the first region 21x, which partially overlaps with the first region 21x. The area of ​​the region 21q is ½ or less than the area of ​​the first region 21x. The area of ​​the region 21q may be ¼ or less than the area of ​​the first region 21x. The area of ​​the region 21q is ½ or less than the area of ​​the third region 21z. The area of ​​the region 21q may be ¼ or less than the area of ​​the third region 21z.

[0046] The switching valve 54 switches the communicating pipe 56b to a state where it does not communicate with the pump 52, and then switches the communicating pipe 56a to a state where it communicates with the pump 52. That is, the discharge of the cleaning water flowing through the first region 21x ends, and then the discharge of the cleaning water flowing through the third region 21z begins. This makes it possible to avoid a situation in which the flow rate of the cleaning water flowing through the third region 21z is reduced by the cleaning water flowing through the first region 21x in a region overlapping with the first region 21x when the cleaning water flows through the third region 21z.

[0047] The switching valve 54 switches from a state in which the connecting pipe 56a communicates with the pump 52 to a state in which the connecting pipe 56a does not communicate with the pump 52. The switching valve 54 then maintains a state in which the connecting pipe 56c, which communicates with the discharge port 46 located on the right side, communicates with the pump 52, and maintains a state in which the other connecting pipes 56a, 56b, 56d are not connected with the pump 52. Flush water pressurized by the pump 52 passes through the connecting pipe 56c and is discharged from the discharge port 46 into the toilet bowl 21.

[0048] The outlet 46 is disposed at the tip of a nozzle 47 similar to the outlet 44. The nozzle 47 is disposed at an opening 46a similar to the opening 44a. The outlet 46, the opening 46a, and the nozzle 47 are disposed symmetrically with respect to the outlet 44 and the nozzle 45, with respect to a plane perpendicular to the left-right direction, at the center of the left-right direction of the toilet bowl 21. The flush water that passes through the communication pipe 56c and reaches the nozzle 47 spreads in the vertical direction according to the shape of the nozzle 47. As a result, the flush water discharged from the outlet 44 flows straight from the outlet 46 in parallel to the front-rear direction, and spreads upward and downward. The flush water flowing upward comes into contact with the upper end flange portion 30 and flows forward along the upper end edge 21e of the toilet bowl 21 along the upper end flange portion 30.

[0049] As shown in FIG. 8, flush water discharged from the discharge port 46 flows into the second region 21y of the upper region 21c of the toilet bowl 21. The second region 21y, which is depicted by a number of dots, reaches the upper edge 21e from the discharge port 46 to the front end of the toilet bowl 21. In other words, flush water flowing through the second region 21y flows from the discharge port 46 to the front end of the toilet bowl 21 onto the lower surface of the upper end flange portion 30. This allows flush water flowing through the second region 21y to wash the lower surface of the upper end flange portion 30 on the right side. The lower end of the second region 21y reaches the water surface WF of the collected water. The second region 21y extends beyond the front end of the toilet bowl 21 to the left side. The first region 21x and the second region y extend beyond the front end of the toilet bowl 21 in opposite directions in the left-right direction. The first region 21x and the second region y have an overlapping region 21p. The second region 21y and the third region z have a mutually overlapping region 21r (see FIG. 9). The area of ​​the region 21p is ½ or less than the area of ​​the first region 21x. The area of ​​the region 21p may be ¼ or less than the area of ​​the first region 21x. The area of ​​the region 21p is ½ or less than the area of ​​the second region 21y. The area of ​​the region 21p may be ¼ or less than the area of ​​the second region 21y. The area of ​​the region 21r is ½ or less than the area of ​​the second region 21y. The area of ​​the region 21r may be ¼ or less than the area of ​​the second region 21y. The area of ​​the region 21r is ½ or less than the area of ​​the third region 21z. The area of ​​the region 21r may be ¼ or less than the area of ​​the third region 21z.

[0050] The shape and direction of outlet 46 and the pressure of the flush water by pump 52 are adjusted so that the thickness of the flush water discharged from outlet 46 is maintained at 5.0 mm or less over the entire area of ​​second region 21y. Pump 52 increases the pressure so that the flow velocity of the flush water flowing through second region 21y is at least instantaneously 0.5 m / s or more over the entire area of ​​second region 21y at a position 1.0 mm from the surface of toilet bowl 21.

[0051] The switching valve 54 switches the communicating pipe 56a and the pump 52 to a non-communicating state, and then switches the communicating pipe 56c and the pump 52 to a communicating state. That is, the discharge of the cleaning water flowing through the third region 21z is completed, and then the discharge of the cleaning water flowing through the second region 21y is started. This makes it possible to avoid a situation in which the flow rate of the cleaning water flowing through the second region 21y is reduced by the cleaning water flowing through the third region 21z in a region overlapping with the third region 21z when the cleaning water flows through the second region 21y. Similarly, at the timing when the cleaning water starts to flow through the second region 21y, the supply of the cleaning water to the first region 21x is stopped. It makes it possible to avoid a situation in which the flow rate of the cleaning water flowing through the second region 21y is reduced by the cleaning water flowing through the first region 21x in a region overlapping with the first region 21x.

[0052] The switching valve 54 switches from a state in which the connecting pipe 56c communicates with the pump 52 to a state in which the connecting pipe 56c does not communicate with the pump 52. The switching valve 54 then maintains a state in which the connecting pipe 56d, which communicates with the discharge port 48 disposed at the front end of the drainage section 32, communicates with the pump 52, and a state in which the other connecting pipes 56a, 56b, 56c are not communicated with the pump 52. Flush water pressurized by the pump 52 is discharged from the discharge port 48 into the toilet bowl 21.

[0053] The cleaning water discharged from the outlet 44 cleans the entire area of ​​the first region 21x. The cleaning water discharged from the outlets 42 and 46 other than the outlet 44 cleans a part of the first region 21x. The first region 21x is cleaned by the cleaning water discharged from each of the outlets 42, 44, and 46. 1 / 4 or more of the area of ​​the first region 21x is cleaned only by the cleaning water discharged from the outlet 44. 1 / 2 or more of the area of ​​the first region 21x may be cleaned only by the cleaning water discharged from the outlet 44. Similarly, the second region 21y is cleaned by the cleaning water discharged from each of the outlets 42, 44, and 46. 1 / 4 or more of the area of ​​the second region 21y is cleaned only by the cleaning water discharged from the outlet 46. 1 / 2 or more of the area of ​​the second region 21y may be cleaned only by the cleaning water discharged from the outlet 46. Similarly, the third region 21z is washed with the cleaning water discharged from each of the outlets 42, 44, and 46. ¼ or more of the third region 21z is washed only with the cleaning water discharged from the outlet 42. Half or more of the third region 21z may be washed only with the cleaning water discharged from the outlet 42.

[0054] Discharge outlet 48 is disposed in a through hole provided in toilet body 20. Excrement and the like washed away with flushing water discharged from discharge outlets 42, 44, 46 accumulates in drainage section 32. The flushing water discharged from discharge outlet 48 flushes the excrement and the like accumulated in drainage section 32 together with the accumulated water from drain outlet 34 to drain pipe 36.

[0055] (effect) Discharge section 40 discharges flushing water from respective discharge ports 44, 46 in the left-right direction until it reaches upper edge 21e. Flush water discharged from discharge port 44 flows over the front end of toilet bowl 21 along upper edge 21e to the right of the center in the left-right direction. Flush water discharged from discharge port 46 flows over the front end of toilet bowl 21 along upper edge 21e to the left of the center in the left-right direction. As a result, the entire area in front of discharge ports 44, 46 can be cleaned with flushing water up to upper edge 21e of toilet bowl 21.

[0056] At the outlets 44, 46, the nozzles 45, 47 discharge the washing water in an upward direction. The washing water can be made to flow toward the upper edge 21e. At the outlet 44, the nozzle 45 discharges the washing water in a downward direction. The washing water can be made to flow appropriately toward the first region 21x. At the outlet 46, the nozzle 47 discharges the washing water in a downward direction. The washing water can be made to flow appropriately toward the second region 21y. In a modified example, the shapes of the nozzles 45, 47 and the outlets 44, 46 may be any shape that allows the washing water to be discharged from the outlets 44, 46 in the vertical direction.

[0057] A spreader 42a is disposed at the discharge port 42. The flush water discharged from the discharge port 42 spreads and flows due to the spreader 42a. The flush water discharged from the discharge port 42 reaches the underside of the upper end flange portion 30. This allows the entire area behind the discharge ports 44, 46 to be washed with flush water up to the upper edge 21e of the toilet bowl 21.

[0058] The flush water discharged from the discharge ports 42, 44, 46 can clean the entire circumference of the toilet bowl 21 up to the upper edge 21e. The underside of the upper flange portion 30 can be cleaned along the entire circumference of the upper flange portion 30. In a modified example, flush water may flow over at least 1 / 2 to 1 / 4 of the entire circumference of the upper edge 21e. In a modified example, flush water may flow at a flow rate of 0.5 m / s or more over at least 1 / 2 to 1 / 4 of the entire circumference of the upper edge 21e.

[0059] The front region 22 of the toilet bowl 21 is composed of a straight line shape 22a and a curved shape 22b. In the front region 22, in a cross section perpendicular to the left-right direction at any position in the left-right direction, the front region 22 is composed of a straight line shape 22a and a curved shape 22b that curves downward. The front region 22 does not have a shape that bulges upward. The same is true at any position in the front-rear direction. In the front region 22, no shape that protrudes upward that would hinder the flow of flushing water is arranged. With this configuration, flushing water flows smoothly from above to below. In a modified example, the front region 22 may be composed of the straight line shape 22a and the curved shape 22b within the length range of the drainage section 32 in the left-right direction. In this case, the front region 22 may have a shape that bulges upward in a portion outside the length range of the drainage section 32 in the left-right direction.

[0060] In the front portion of the side region 26, similar to the front region 22, no upwardly protruding shape that would impede the flow of wash water is disposed. With this configuration, the wash water flows smoothly from above to below.

[0061] The front region 22 and the front parts of the lateral region 26 are prone to becoming soiled by excrement, etc. According to the toilet device 10, in the front regions 22 and the front parts of the lateral region 26 where dirt is likely to accumulate, a decrease in the flow rate of flushing water is suppressed, making it easier to wash away excrement, etc. with flushing water.

[0062] The washing water flows at a flow rate of 0.5 m / s or more on the surface of the washing water over the entire area of ​​each of the first region 21x and the second region 21y. This makes it easier to wash away excrement and the like with the washing water. In the front region 22 and the front part of the side region 26 described above, the decrease in flow rate is suppressed, so that the initial speed of the washing water discharged from the discharge ports 44, 46 can be suppressed. In a modified example, the washing water may flow at a flow rate of 0.6 m / s, 0.7 m / s, 0.8 m / s, 0.9 m / s, or 1.0 m / s or more on the surface. In a modified example, the washing water may flow at a part of each of the first region 21x and the second region 21y, for example, at the upper end edge 21e, with a flow rate of 0.5 m / s or more on the surface of the washing water.

[0063] At a position 1.0 mm from the surface of toilet bowl 21, the flush water maintains a flow velocity of 0.5 m / s or more. Excrement and the like that adheres to toilet bowl 21 often occurs up to 1.0 mm above the surface of toilet bowl 21. By maintaining the flow velocity up to a position 1.0 mm above the surface of toilet bowl 21, excrement and the like that adheres to toilet bowl 21 can be easily washed away. In a modified example, the flush water at a position 1.0 mm above the surface of toilet bowl 21 may have a flow velocity of at least any of 0.6 m / s, 0.7 m / s, 0.8 m / s, 0.9 m / s, and 1.0 m / s.

[0064] The thickness of the flush water flowing over the toilet bowl 21 is kept to 5.0 mm or less. The amount of flush water used to flush the toilet bowl 21 can be reduced. If dirt such as excrement is attached to the toilet bowl 21, the dirt can be washed away by flushing water near the contact surface with the toilet bowl 21. Therefore, even if the thickness of the flush water is kept to 5.0 mm or less, a decrease in flushing ability is avoided. In the modified example, the thickness of the flush water flowing over the toilet bowl 21 is kept to 3.0 mm, 4.0 mm, 6.0 mm, or 7.0 mm or less.

[0065] When the upper region 21c is viewed from above, the ratio of the area of ​​the water surface WF to the area other than the water surface WF is 4:6. Also, at the opening of the toilet seat 14, the ratio of the area of ​​the water surface WF to the area other than the water surface WF is 5:5. With this configuration, by increasing the area of ​​the water surface WF, it is possible to prevent waste from directly contacting the toilet bowl 21 and adhering to the toilet bowl 21. In a modified example, when the toilet body 20 is viewed from above, the ratio of the area of ​​the water surface WF to the area other than the water surface WF does not have to be between 4:6 and 10:0, and may be, for example, any of 9:1, 8:2, 7:3, 6:4, and 5:5 instead of 10:0, and any of 5:5, 6:4, 7:3, 8:2, and 9:1 instead of 4:6. In a modified example, when the toilet seat 14 is placed above the toilet body 20 and viewed from the opening of the toilet seat 14, the area of ​​the water surface WF: the area other than the water surface WF does not have to be between 5:5 and 10:0; for example, instead of 10:0, it could be any of 9:1, 8:2, 7:3, and 6:4, and instead of 5:5, it could be any of 6:4, 7:3, 8:2, and 9:1.

[0066] The vertical distance D1 from the top end of the toilet body 20 to position P is equal to the front-rear distance D2 from position P to the front edge F of the pooled water. When feces excreted by a user comes into contact with either the surface of the toilet bowl 21 or the drainage section 32, it often falls forward along the shape of the toilet bowl 21. By setting the distance D1 to be equal to or less than the distance D2, it is possible to prevent the feces from falling over the pooled water and coming into direct contact with the toilet bowl 21.

[0067] Second embodiment As shown in Fig. 14, the toilet apparatus 10 of this embodiment may be provided with four on-off valves 252, 254, 256, and 258 instead of the switching valve 54. The four on-off valves 252, 254, 256, and 258 are respectively disposed in the four communication pipes 56a, 56b, 56c, and 56d. The four on-off valves 252, 254, 256, and 258 switch the communication pipes 56a, 56b, 56c, and 56d in which the four on-off valves 252, 254, 256, and 258 are disposed, between an open state and a closed state. When flush water is supplied to toilet bowl 21, on-off valves 252, 254, 256, 258 switch four communicating pipes 56a, 56b, 56c, 56d from an open state to a closed state in sequence, thereby discharging flush water from outlets 44, 42, 46, 48 in that order. The other configurations are the same as in the first embodiment.

[0068] Third embodiment As shown in FIG. 15, the toilet apparatus 10 of this embodiment includes a motor 345 that changes the direction of the nozzle 45, and an operation button that allows the user to change the direction of the nozzle 45. In the default state, the nozzle 45 faces in the direction shown in FIG. 11. When the user operates the operation button, the nozzle 45 is moved downward as shown by the dashed line in FIG. 15. In this case, the washing water discharged from the discharge port 44 flows only in a part behind the first region 21x. With this configuration, the washing water can be directed toward the part where dirt is attached. The nozzle 47 may also be provided with a motor that changes the direction in the same way as the nozzle 45.

[0069] (Fourth embodiment) In the toilet apparatus 10 of this embodiment, the pump 52 controls the flow rate of the flush water by adjusting the pressure of the flush water. The toilet apparatus 10 is provided with an operation button that allows the user to adjust the flow rate of the flush water. When the operation button is operated by the user, the pump 52 discharges flush water from at least one of the outlets 42, 44, 46, 48, at a flow rate adjusted by the user. With this configuration, the flow rate of the flush water can be adjusted according to the degree of dirt on the toilet bowl 21. In a modified example, the pump 52 may change the flow rate of the flush water discharged from at least one of the outlets 42, 44, 46, 48 between the start and end of the supply of flush water.

[0070] 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.

[0071] (1) There is no limit to the number of outlets arranged in the toilet apparatus 10. For example, the number of outlets may be three or less, or may be five or more. There is also no limit to the location of the outlets. For example, the outlets may be arranged near the front end of the toilet body 20.

[0072] (2) The upper end flange portion 30 may not be disposed. In this case, the lower surface of the toilet seat 14 may be in contact with the upper end edge 21e. The flushing water may flow toward the lower surface of the toilet seat 14. The lower surface of the toilet seat 14 may be flushed by the flushing water. In this modified example, the toilet seat 14 is an example of a "protruding portion." The protruding portion may go around the upper end edge of the toilet bowl 21. In other words, the upper end edge 21e may be disposed at the upper end of the toilet body 20. The upper end edge 21e may be lower than the upper end of the toilet body 20. For example, if a waterproof member that blocks the flow of flushing water is disposed on the toilet body 20, such as the upper end flange portion 30, the upper end edge 21e may be disposed below the waterproof member. For example, if the toilet body 20 has a folded portion that is folded downward toward the toilet bowl 21 at the upper end, and if the lower end of the folded portion functions as a waterproof member, the upper end edge 21e may coincide with the lower end of the folded portion. When the lower end of the folded portion is disposed with a gap between it and the toilet bowl 21, and the upper end of the folded portion, i.e., the upper end portion of the toilet body 20, functions as a waterproof member, the upper edge 21e may coincide with the upper end portion of the toilet body 20. The upper edge 21e may be the upper end portion of the area designed to allow flushing water to flow.

[0073] (3) The shape of the vicinity of the upper edge 21e of the toilet bowl 21 may be, for example, as shown in Figures 16 and 17, such that the lower part of the upper edge 21e is recessed from the upper edge 21e. In these modifications, the upper flange portion 30 may or may not be provided. When the upper flange portion 30 is not provided, the toilet seat 14 may be in contact with the upper edge 21e, as in modification (2).

[0074] (4) At least one of the outlets 42, 44, 46, 48 of the discharge part 40 does not have to be located in the toilet body 20. The discharge part 40 may discharge flush water from the functional part 16.

[0075] (5) The discharge unit 40 may start discharging the cleaning water from at least one of the discharge ports 42, 46 after the flow velocity of the cleaning water flowing through the first region 21x becomes either ½ or ¼ of the maximum flow velocity after starting discharging the cleaning water from the discharge port 44. The discharge order of the discharge ports 42, 44, 46 is not particularly limited.

[0076] (6) Discharge section 40 may start discharging flush water from discharge outlet 46 while flush water is being discharged from discharge outlet 44. The flush water discharged from discharge outlet 44 may merge with the flush water discharged from discharge outlet 46 in toilet bowl 21, for example, in front region 22.

[0077] (7) The number and positions of the outlets arranged in the outlet unit 40 are not particularly limited. For example, the outlet unit 40 may have only one outlet arranged to the right of the center in the left-right direction of the toilet bowl 21 and in front of the drainage unit 32. In this case, the outlet may discharge flushing water toward the rear. For example, the outlet unit 40 may have one outlet each on the left and right sides of the center in the left-right direction of the toilet bowl 21, for a total of two outlets. One of the two outlets may be arranged forward of the center in the front-to-rear direction of the toilet bowl 21. The other of the two outlets may be arranged rearward of the center in the front-to-rear direction of the toilet bowl 21. The two outlets may discharge flushing water in the same direction, either clockwise or counterclockwise, as viewed from above.

[0078] The technical elements described in this specification or drawings have technical utility either 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 this specification or drawings can achieve multiple objectives simultaneously, and achieving one of these objectives is itself technically useful. [Explanation of symbols]

[0079] 10: toilet device, 12: toilet part, 14: toilet seat, 14a: opening, 20: toilet body, 21: toilet bowl, 21b: water collection area, 21c: upper area, 21e: upper edge, 21u: lower end, 21x: first area, 21y: second area, 21z: third area, 22: front area, 22a: straight shape, 22b: curved shape, 24: rear area, 24a: straight shape, 24b: curved shape, 24c: curved shape, 26: Side region, 26a: straight line shape, 26b: curved shape, 26c: curved shape, 30: upper flange portion, 32: drain portion, 34: drain outlet, 36: drain pipe, 36a: curved position, 40: discharge portion, 42, 44, 46, 48: discharge outlet, 42a: spreader, 45, 47: nozzle, 52: pump, 54: switching valve, 56: communicating pipe, 56a: communicating pipe, 56b: communicating pipe, 56c: communicating pipe, 56d: communicating pipe

Claims

1. a toilet body having a toilet bowl; a discharge part that flushes the toilet bowl surface with flush water; A toilet apparatus, wherein the discharge section discharges the flush water such that the flow velocity on the surface of the flush water is 0.5 m / s or more.

2. The toilet apparatus according to claim 1, wherein the discharge section discharges flush water such that the thickness of the flush water flowing on the surface of the toilet bowl in the specific area is 5.0 mm or less.

3. 3. The toilet apparatus according to claim 1, wherein the discharge section discharges the flushing water in a specific area such that the flow velocity of the surface of the flushing water at a position 1.0 mm from the surface of the toilet bowl is 0.5 m / s or more.

4. 3. The toilet apparatus according to claim 1, wherein the discharge portion discharges the flush water at an angle of from 0° to 30° toward the surface of the toilet bowl.

5. The discharge section is a discharge port disposed on either the left or right side of the center of the toilet bowl in the left-right direction; 3. The toilet apparatus according to claim 1, wherein the flush water flows to the other side of the left or right of the center of the toilet bowl in the left-right direction, and the flow velocity of the flush water on the surface of the flush water is 0.5 m / s or more.

6. 3. The toilet apparatus according to claim 1, wherein the discharge section causes the flush water to flow up to the surface of the water in the toilet bowl, with a flow velocity of the surface of the flush water maintained at 0.5 m / s or more.

7. The toilet apparatus according to claim 1 , wherein the discharge portion discharges the flush water downward.

8. 3. The toilet apparatus according to claim 1, wherein the discharge portion discharges flush water in a direction along an upper edge of the toilet bowl, causing the flush water to flow along the upper edge.

9. The toilet body has a drainage portion recessed downward from the bottom of the toilet bowl, The toilet bowl has a water collection area extending from the upper end of the drainage section to the water level of the water in the toilet bowl in the vertical direction, and an upper area extending from the upper end of the water collection area to the upper edge of the toilet bowl, A toilet device as described in any one of claims 1 to 2, wherein in a cross section perpendicular to the left-right direction at the center of the left-right direction of the toilet bowl, the surface of the upper region forward of the water collection region is configured with at least one of a downwardly curved shape and a straight shape that slopes downward toward the water surface of the collected water.

10. A toilet device as described in any one of claims 1 to 2, wherein when the toilet bowl is viewed from above, the ratio of a first area of ​​the water surface stored in the toilet bowl to a second area of ​​the water other than the water surface is 4:6 to 10:

0.

11. The discharge section is flushing water is ejected in multiple directions to flow onto the surface of the toilet bowl; flushing water onto the surface of the toilet bowl by at least one of using the pressure of flushing water supplied from a supply pipe extending from a clean water path to cause flushing water to flow onto the surface of the toilet bowl, and flushing water pressurized by a pump to flow onto the surface of the toilet bowl; The flush water is discharged in a first direction among the plurality of directions to flow onto a first region of the surface of the toilet bowl; The toilet apparatus according to claim 1 or 2, wherein the flush water is discharged in a second direction of the plurality of directions, and the flush water is caused to flow onto a second area of ​​the surface of the toilet bowl that is different from the first area.

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