Water closet

Abstract

The water-washing toilet of the present application has: a bowl portion having a dirt receiving surface for receiving dirt, an inner edge portion formed at an upper portion of the dirt receiving surface, and a pot portion formed at a lower portion of the dirt receiving surface and having a water storage surface formed inside; one or more water discharge ports for discharging washing water along the inner edge portion; and a drain line connected to a bottom portion of the bowl portion, wherein a front main flow (F1) and a rear main flow (F2) of the washing water discharged from the water discharge ports are configured to swirl at the dirt receiving surface (16) of the bowl portion (6) and flow into three or more regions divided into four regions (S1, S2, S3, S4) of the water storage surface at an initial stage of washing.

Description

TECHNICAL FIELD

[0001] The present application relates to a water-washing toilet, and particularly to a water-washing toilet that improves the discharge performance of floating-type excrement. BACKGROUND

[0002] In the past, as described in Patent Documents 1 to 3, for example, as an example of a water-washing toilet, a washing-type water-washing toilet is known that flushes excrement by the flow of water generated by the fall of water in the basin portion.

[0003] The washing-type water-washing toilet described in Patent Document 1 discharges washing water from three water discharge ports, and by adjusting the amount of washing water discharged from each of the water discharge ports, forms a strong water flow toward a specific area of the water storage surface (corresponding to the second area S2 described later), thereby obtaining good basin portion washing performance.

[0004] The washing-type water-washing toilet described in Patent Document 2 discharges washing water from two water discharge ports, and by causing a main flow of washing water having a large swirling force to flow into a first area of the water storage surface (corresponding to the first area S1 and the second area S2 described later), thereby improving the discharge performance of excrement.

[0005] The washing-type water-washing toilet described in Patent Document 3 improves the excrement discharge performance by causing a large amount of washing water from the second water discharge port to flow in from the rear of the water storage surface.

[0006] PRIOR ART DOCUMENTS

[0007] PATENT DOCUMENTS

[0008] Patent Document 1: Japanese Patent Laid-Open No. 2017-179958

[0009] Patent Document 2: Japanese Patent Laid-Open No. 2021-55437

[0010] Patent Document 3: Japanese Patent Laid-Open No. 2019-190217

[0011] Problems to be solved by the invention

[0012] However, in the washing-type water-washing toilet, the water storage surface is set to be larger than in the past in consideration of reducing the area of the excrement receiving surface as a drying surface to thereby suppress the adhesion of excrement. However, it can be clearly seen that in the washing-type water-washing toilets of Patent Documents 1 to 3 described above, since washing water with a strong water flow is caused to flow into a specific area of the water storage surface, if the water storage surface is increased, the washing water with a strong water flow only flows into the specific area of the water storage surface, thereby causing the surface of the water storage surface to be uneven, and as a result, floating-type excrement floating on the surface of the water storage surface can not be sufficiently discharged.

[0013] The inventors of this invention discovered a problem in water-washing toilets, such as flushing toilets, where a large water surface was formed, and focused their research on solving this problem, thus forming this invention.

[0014] This invention was made to solve the aforementioned new problems, and its purpose is to provide a water-washing toilet that enhances the discharge capacity of airborne waste. Summary of the Invention

[0015] To achieve the above objectives, the present invention is characterized by providing a water-washing toilet that uses washing water to clean and discharge waste, comprising: a basin having a waste receiving surface for receiving waste, an inner edge formed on the upper part of the waste receiving surface, and a pitcher formed on the lower part of the waste receiving surface and having a water storage surface formed therein; one or more spouts that discharge washing water along the inner edge; and a drain pipe connected to the bottom of the basin, wherein the main stream of washing water discharged from the spout is configured to swirl on the waste receiving surface of the basin, and flow into three or more of the four regions divided into four regions by a front-back direction center line and a left-right direction center line at the initial stage of washing, wherein the front-back direction center line and the left-right direction center line divide the water storage surface in two in the front-back direction and the left-right direction from a top view.

[0016] In this invention, the main stream of the washing water discharged from the spout is configured to swirl around the dirt-receiving surface of the basin. At the initial stage of washing, it flows into three or more of the four regions divided by the front-back center line and the left-right center line. These center lines divide the water surface in two in the front-back and left-right directions from a top-view perspective. Therefore, according to this invention, at the initial stage of washing, the washing water flows into three or more of the four regions of the water surface, thus enabling earlier discharge of floating debris. Furthermore, by applying pressure to the entire water surface, the water surface remains stable, thereby enhancing the discharge force of floating debris.

[0017] In this invention, preferably, the prescribed energy of the washing water flowing into the water storage surface is such that it reaches three or more of the four regions of the water storage surface within 1 second.

[0018] In this invention, since the prescribed energy of the washing water flowing into the water storage surface reaches three or more of the four regions divided into the water storage surface within one second, the pressing pressure applied to the water storage surface can be fixed, the instability of the water storage surface can be suppressed, and floating debris can be discharged.

[0019] In this invention, preferably, the main stream of washing water is formed as a front main stream swirling in front of the dirt receiving surface of the basin and a rear main stream swirling behind the dirt receiving surface of the basin.

[0020] In this invention, by forming a front mainstream and a rear mainstream of washing water, the entire dirt-receiving surface of the basin can be cleaned and the discharge performance of floating dirt can be improved.

[0021] In this invention, preferably, the front and rear mainstreams of the washing water are configured to not merge but flow into the water storage surface.

[0022] In this invention, the front and rear main streams of the washing water do not merge but flow into the water storage surface. Therefore, it is easy to keep the energy of the washing water flowing into more than three areas constant, suppress the instability of the water storage surface, and discharge floating debris.

[0023] In this invention, preferably, the front and rear main streams of the washing water are configured to flow into different regions of the region divided into four areas.

[0024] In this invention, the front and rear main streams of the washing water flow into regions with different boundaries that are divided into four areas, that is, they do not flow into the same area. This makes it easy to keep the pressure on the water storage surface constant and to suppress the instability of the water storage surface.

[0025] In this invention, preferably, the water outlets are a first water outlet forming the main front flow and a second water outlet forming the main rear flow. The first water outlet is formed on one side of the front area of ​​the waste receiving surface of the basin, and the second water outlet is formed on the other side of the rear area of ​​the waste receiving surface of the basin. The main front flow mainly flows into the rear area of ​​the water storage surface divided into four areas, on one side of the left or right where the first water outlet is not located. The main rear flow mainly flows into the front area of ​​the water storage surface divided into four areas, on one side of the left or right where the second water outlet is not located.

[0026] In this first embodiment of the invention, since the washing water discharged from the first and second water outlets flows into the area on the side without the water outlets, the washing water does not swirl around the basin surface before flowing into the water storage surface, thereby enabling the washing water to flow into the water storage surface earlier.

[0027] In this invention, preferably, the rear surface of the waste-receiving surface of the basin has a recess that is more deeply recessed than the left and right sides of the waste-receiving surface, and the rear surface extends downward relative to the upper end of the left and right sides of the pot.

[0028] In this invention, the rear surface of the waste-receiving surface of the basin has a recess that is deeper than the left and right sides of the waste-receiving surface. This rear surface extends downwards from the upper end of the left and right sides of the pitcher. Therefore, the main flow of washing water passes the side of the pitcher and reaches the rear surface of the waste-receiving surface, where its flow direction changes, flowing directly along the rear surface of the waste-receiving surface into the water storage surface. As a result, according to the invention, the main flow of washing water can be guided to the water storage surface earlier than when it swirls around the waste-receiving surface before flowing into the water storage surface. The main flow of water at the front and rear can be guided to the water storage surface at approximately the same time, thereby improving the discharge performance of suspended solids.

[0029] In this invention, preferably, the recess on the rear surface of the waste-receiving surface of the basin is formed such that its lateral width is narrower than the maximum lateral width of the pot.

[0030] In this invention, the lateral width W2 of the recess on the rear surface of the dirt receiving surface of the basin is narrower than the maximum lateral width W1 of the pot. Therefore, the diffusion of the washing water from the front and swirling on the side of the pot can be suppressed, and the main stream of washing water can flow into the water storage surface earlier.

[0031] In this invention, preferably, the concave portion of the rear surface of the waste receiving surface of the basin is formed in a concave shape along the vertical direction, and its lower end is connected to the rear of the pot through a convex connecting portion.

[0032] In this invention, the recessed portion of the rear surface of the waste receiving surface of the basin is formed in a concave shape along the vertical direction, and its lower end is connected to the rear of the pot through a convex connecting portion. Therefore, the washing water can be smoothly guided to the water storage surface.

[0033] In this invention, preferably, for the radius of curvature R1 at the upper position and the radius of curvature R2 at the lower position behind the pot, the radius of curvature R2 at the lower position is formed to be smaller than the radius of curvature R1 at the upper position.

[0034] In this invention, the radius of curvature R1 at the upper position and the radius of curvature R2 at the lower position of the back of the kettle are formed to be smaller than the radius of curvature R1 at the upper position (R1 > R2). Therefore, the flow of washing water from the kettle to the drain pipe becomes smoother, and the performance of dirt discharge is improved.

[0035] In this invention, preferably, the water outlet has a first inner edge water outlet and a second inner edge water outlet. The first inner edge water outlet is disposed in the inner space of the basin, further forward than the front end of the water storage surface, and clean water is discharged forward from the first inner edge water outlet. The second inner edge water outlet is disposed further rearward than the rear end of the water storage surface, and clean water is discharged rearward from the second inner edge water outlet.

[0036] In this invention, the first inner edge water outlet is positioned further forward than the front end of the water reservoir surface, discharging washing water forward from the first inner edge water outlet. Conversely, the second inner edge water outlet is positioned further rearward than the rear end of the water reservoir surface, discharging washing water backward from the second inner edge water outlet. Therefore, at the start of washing, the washing water from both the first and second inner edge water outlets flows into the water reservoir surface as early and approximately simultaneously as possible, ensuring that the washing water flows evenly across the entire water reservoir surface. Consequently, in a toilet bowl where all the washing water supplied to the toilet body is discharged from the inner edge water outlets, floating debris can be adequately removed.

[0037] In this invention, preferably, the first inner edge water outlet and the second inner edge water outlet are located further to the left of the left end of the water storage surface or further to the right of the right end of the water storage surface.

[0038] In this invention, at the start of the washing process, the washing water from the first inner edge outlet and the second inner edge outlet can flow into the water storage surface simultaneously, so that the washing water flows evenly into the entire water storage surface.

[0039] In this invention, preferably, the first inner edge water outlet and the second inner edge water outlet are respectively arranged diagonally in the region where the center line that bisects the water storage surface in the left-right direction and the center line that bisects the water storage surface in the front-back direction intersect, from a top view perspective.

[0040] In this invention, at the start of the washing process, the washing water from the first inner edge outlet and the second inner edge outlet can flow into the water storage surface simultaneously, allowing the washing water to flow evenly across the entire water storage surface. Attached Figure Description

[0041] Figure 1 This is a top cross-sectional view of a water-washing toilet according to the first embodiment of the present invention.

[0042] Figure 2 It is along Figure 1 The longitudinal section view observed along line II-II.

[0043] Figure 3 This is a top view showing the first region S1, the second region S2, the third region S3, and the fourth region S4 of the water-washing toilet according to the first embodiment of the present invention.

[0044] Figure 4A This is a schematic top view showing a first example of the arrangement of the first and second water outlets of the water-washing toilet according to the first embodiment of the present invention in the basin.

[0045] Figure 4B This is a schematic top view showing a second example of the arrangement of the first and second water outlets of the water-washing toilet according to the first embodiment of the present invention in the basin.

[0046] Figure 4C This is a schematic top view showing a third example of the arrangement of the first and second water outlets of the water-washing toilet according to the first embodiment of the present invention in the basin.

[0047] Figure 4D This is a schematic top view showing a fourth example of the arrangement of the first and second water outlets of the water-washing toilet according to the first embodiment of the present invention in the basin.

[0048] Figure 5 This is a line graph showing the kinetic energy (instantaneous value) of the flushing water discharged from the spout into each area of ​​the water storage surface in the flush toilet according to the first embodiment of the present invention.

[0049] Figure 6A This is a line graph showing the kinetic energy (cumulative amount) of the washing water discharged from the spout into each area of ​​the water surface in the water-washing toilet according to the first embodiment of the present invention.

[0050] Figure 6B This is a line graph showing the kinetic energy (cumulative amount) of the cleaning water discharged from the spout of the water-washing toilet in the comparative example of the first embodiment of the present invention as it flows into each area of ​​the water surface.

[0051] Figure 7 This is a top view of the basin in the water-washing toilet according to the first embodiment of the present invention, showing the washing water discharged from the first and second water outlets flowing into the water storage surface.

[0052] Figure 8 This is a perspective cross-sectional view of the water-washing toilet of the second embodiment of the present invention, viewed from an oblique angle.

[0053] Figure 9 yes Figure 2 A magnified longitudinal section view of the part.

[0054] Figure 10 yes Figure 1 A magnified top-view cross-sectional view of a portion of the structure.

[0055] Figure 11 It is along Figure 2 A cross-sectional view observed along the XI-XI line.

[0056] Figure 12 It is along Figure 2 A cross-sectional view observed along line XII-XII.

[0057] Figure 13 This is a perspective cross-sectional view showing the flow of the main stream of washing water discharged from the spout in the water-washing toilet according to the second embodiment of the present invention.

[0058] Figure 14 This is a perspective cross-sectional view showing the flow of the main stream of washing water discharged from the spout in the water-washing toilet according to the second embodiment of the present invention.

[0059] Figure 15 This is a top cross-sectional view of a water-washing toilet according to the third embodiment of the present invention.

[0060] Figure 16 This is a conceptual top view showing the position of the water outlet (inner edge water outlet) and the flow of washing water in the water-washing toilet according to the third embodiment of the present invention.

[0061] Figure 17A This is a top view showing the location of the water outlet (inner edge outlet) and the flow of washing water in the existing example 1 water-washing toilet.

[0062] Figure 17B This is a top view showing the location of the water outlet (inner edge outlet) and the flow of washing water in the existing water-washing toilet of Example 2. Detailed Implementation

[0063] The following describes a water-washing toilet according to a first embodiment of the present invention. The water-washing toilet of the present invention is applicable to flushing-type water-washing toilets, siphon-type water-washing toilets, or other types of water-washing toilets. Hereinafter, a flushing-type water-washing toilet will be described as an embodiment of the present invention. First, let's start with... Figure 1 and Figure 2 Let's begin.

[0064] like Figure 1 and Figure 2 As shown, the flushing toilet 1 is a type of toilet that uses the flow of water generated by the drop of water in the basin to flush away waste. The flushing toilet 1 includes: a ceramic toilet body 2 and a water tank 4 for storing flushing water for cleaning the toilet body 2. The toilet body 2 has a basin 6 on the front side and a common water passage 8 formed in the upper rear part. An opening 7 located at the upstream end of the common water passage 8 communicates with the water tank 4. Furthermore, a drain pipe 10 for discharging waste is formed in the lower rear part of the basin 6.

[0065] In this instruction manual, the side of the toilet closest to the user's hand when viewed from the user's side will be described as the front, the inside as the back, the right side as the right side, and the left side as the left side.

[0066] The aforementioned water tank 4 is equipped with a drain valve 12. When the user operates the lever (not shown), the drain valve 12 is opened, and the clean water in the water tank 4 is supplied to the toilet body 2.

[0067] It should be noted that, in this embodiment, in addition to the water storage tank 4, the water source for washing water can be a direct-pressure tap water supply or a device using a flushing valve, or a pump can be used to supply washing water.

[0068] The basin 6 has a basin-shaped waste receiving surface 16, an inner edge 18 formed above the waste receiving surface 16, and a pot 22 formed below the waste receiving surface 16 and having a water storage surface 20 formed therein. The water storage surface 20 of the pot 22 is approximately triangular, measuring 160mm to 180mm in the front-to-back direction and 125mm to 145mm in the width direction when viewed from above, making it larger (enlarged) than the water storage surface of conventional wash-type toilets. Furthermore, the pot 22 is approximately 20cm to 24cm in the front-to-back direction and 15cm to 19cm in the width direction when viewed from above, forming an approximately triangular shape relative to the water storage surface 20, which is oval (with a pointed front).

[0069] A first water outlet 24 for discharging washing water is formed on the left front side when viewed from the front, and a second water outlet 26 for discharging washing water is formed on the right rear side when viewed from the front. The aforementioned common water passage 8 branches downstream into a first water passage 28 and a second water passage 30. The first water passage 28 extends to the first water outlet 24, and the second water passage 30 extends to the second water outlet 26, supplying washing water from the water storage tank 4 to the first water outlet 24 and the second water outlet 26. The first water outlet 24 and the second water outlet 26 discharge washing water in a swirling flow that forms a counter-clockwise swirling flow. In this embodiment, a counter-clockwise swirling flow is formed.

[0070] It should be noted that in this embodiment, there may be one water outlet, or more than two (e.g., three).

[0071] Next, according to Figure 3 The water storage surface of the water-washing toilet according to the first embodiment of the present invention will be described. For example... Figure 3As shown, for ease of explanation, the area of ​​the water storage surface 20 formed inside the pot 22 is divided into four regions by a center line A1 extending in the left-right direction (width direction) and a center line A2 extending in the front-back direction in the width direction. These four regions will be described below. Specifically, the water storage surface 20 includes a first region S1 on the left rear side, a second region S2 on the right rear side, a third region S3 on the right front side, and a fourth region S4 on the left front side. It should be noted that in this embodiment, the water storage surface 20 is divided into four regions, but the pot 22 can also be divided into four regions in the same way.

[0072] Next, according to Figure 4A , Figure 4B , Figure 4C , Figure 4D The various configurations of the water outlet that discharges clean water are explained. Figure 4A This is a schematic top view showing a first example of the arrangement of the first and second water outlets of the water-washing toilet according to the first embodiment of the present invention on the basin. Figure 4B This is a schematic top view showing a second example of the arrangement of the first and second water outlets of the water-washing toilet according to the first embodiment of the present invention in the basin. Figure 4C This is a schematic top view showing a third example of the arrangement of the first and second water outlets of the water-washing toilet according to the first embodiment of the present invention in the basin. Figure 4D This is a schematic top view showing a fourth example of the arrangement of the first and second water outlets of the water-washing toilet according to the first embodiment of the present invention in the basin.

[0073] like Figure 4A and even Figure 4D As shown, the basin 6 is divided into four regions in a top view by the center line B1 extending in the left-right direction (width direction) and the center line B2 extending in the front-back direction.

[0074] exist Figure 4A In the first example shown, the first water outlet 24 is located in the area on the left front side of the basin 6, and discharges water forward to form the front mainstream F1. The second water outlet 26 is located in the area on the right rear side of the basin 6, and discharges water laterally to form the rear mainstream F2.

[0075] exist Figure 4B In the second example shown, the first water outlet 24 is located in the area on the left rear side of the basin 6, and discharges water forward to form the front mainstream F1. The second water outlet 26 is located in the area on the right rear side of the basin 6, and discharges water laterally to form the rear mainstream F2.

[0076] exist Figure 4CIn the third example shown, the first water outlet 24 is located in the area on the left front side of the basin 6, and water is discharged forward to form the front mainstream F1. The second water outlet 26 is located in the area on the right front side of the basin 6, and water is discharged backward to form the rear mainstream F2.

[0077] exist Figure 4D In the fourth example shown, the first water outlet 24 is located in the area on the left rear side of the basin 6, and discharges water forward to form the front mainstream F1. The second water outlet 26 is located in the area on the right front side of the basin 6, and discharges water backward to form the rear mainstream F2.

[0078] In the water-washing toilet 1 of this embodiment, in Figure 4A In the first case, both the upstream mainstream F1 and the downstream mainstream F2 easily flow into the water surface 20, however, Figure 4B In the second case, the main F1 stream had difficulty flowing into the reservoir surface 20. Figure 4C In the third case, the main F2 flow from the rear was unable to flow into the reservoir surface 20. Figure 4D In the fourth case, neither the upstream mainstream F1 nor the downstream mainstream F2 could flow into the water surface 20.

[0079] In the water-washing toilet 1 of this embodiment, the main stream of washing water, namely the front main stream F1 and the rear main stream F2, flows into three or more of the four areas of the above-mentioned water storage surface 20 at the initial stage of washing, so that the timing of the discharge of floating waste is advanced, and pressure is applied to the front of the water storage surface 20, so that the water storage surface 20 is not unstable, thereby improving the discharge force of floating waste.

[0080] In order to achieve the above-mentioned features, the following mechanism is adopted in the water-washing toilet 1 of this embodiment.

[0081] Mechanism 1 (with a first water outlet and a second water outlet)

[0082] First, such as Figure 4A The first case and Figure 4C As shown in the third example, in the case where the main flow F1 of the washing water discharged from the first outlet 24 flows into the water storage surface 20 earlier, (I) an inflow delay mechanism is provided to delay the flow of the main flow F1 of the washing water discharged from the first outlet 24 into the water storage surface 20. The inflow delay mechanism can control the flow rate of the washing water by a pressure pump, or by the shape of the first water passage 28 of the washing water, the shape of the first outlet 24, the shape of the dirt receiving surface 16, etc. In addition, the distance from the main flow F1 discharged from the first outlet 24 to the water storage surface 20 can be increased.

[0083] Furthermore, if the main flow F1 of the washing water discharged from the first outlet 24 flows into the water storage surface 20 earlier, (II) an inflow promotion mechanism is provided to ensure that the main flow F1 of the washing water discharged from the second outlet 26 flows into the water storage surface 20 earlier. The inflow promotion mechanism can increase the flow velocity of the main flow F2 discharged from the second outlet 26 by allowing the rear flow F2 to flow towards the water storage surface 20. For this purpose, the flow velocity of the washing water is controlled by a pressure pump, or by the shape of the second water passage 30 of the washing water, the shape of the second outlet 26, the shape of the dirt receiving surface 16, etc.

[0084] Mechanism 2 (with a first water outlet and a second water outlet)

[0085] Next, as Figure 4B The second case and Figure 4D As shown in the fourth example, when the main stream F1 of the washing water discharged from the first outlet 24 flows into the water storage surface 20 later, an inflow promotion mechanism is provided to ensure that the main stream F1 of the washing water discharged from the first outlet 24 flows into the water storage surface 20 earlier. The inflow promotion mechanism can control the flow rate of the washing water via a pressure pump, or by controlling the flow rate through the shape of the first water passage 28, the shape of the first outlet 24, the shape of the dirt receiving surface 16, etc. Furthermore, the distance from the main stream F1 discharged from the first outlet 24 to the water storage surface 20 can be shortened, allowing the main stream F1 to flow into the water storage surface 20 along the side of the container 22.

[0086] Mechanism 3 (with a first water outlet and a second water outlet)

[0087] Furthermore, such as Figure 4B The second case and Figure 4D In the fourth example, when the main flow F1 of the washing water discharged from the first outlet 24 flows into the water storage surface 20 later, an inflow promotion mechanism is provided to ensure that the main flow F2 of the washing water discharged from the second outlet 26 flows into the water storage surface 20 earlier. The inflow promotion mechanism can control the flow rate of the washing water using a pressure pump, or by controlling the flow rate through the shape of the second water passage 30, the shape of the second outlet 26, the shape of the dirt receiving surface 16, etc. Furthermore, the distance from the main flow F2 discharged from the second outlet 26 to the water storage surface 20 can be increased.

[0088] Next, according to Figure 5 , Figure 6A , Figure 6B The kinetic energy of the washing water flowing into the water storage surface of the water-washing toilet 1 in this embodiment will be explained. Figure 5 , Figure 6A , Figure 6BThe kinetic energy of the wash water shown was determined using fluid analysis. Figure 5 , Figure 6A , Figure 6B The results of this measurement are shown in the figure.

[0089] First, if the user operates the lever (not shown) of the water tank 4, the drain valve 12 will open, and the washing water stored in the water tank 4 will be discharged from the first outlet 24 and the second outlet 26 through the common water passage 8, the first water passage 28, and the second water passage 30.

[0090] Among them, such as Figure 5 The process involves opening the control lever, initiating the water flow into the water reservoir 20, which takes approximately 5.5 seconds from the start of the flow until it ends. This flow period is divided into three phases: initial washing stage (E1), middle washing stage (E2), and final washing stage (E3). Figure 5 It can be seen that the kinetic energy of the washing water flowing into each region (S1, S2, S3, S4) of the water storage surface 20 is generated 1 second after the washing water flows into the water storage surface 20.

[0091] Next, as Figure 6A As shown, in the water-washing toilet 1 of this embodiment, the kinetic energy (cumulative value) of the washing water flowing into each region S1, S2, S3, and S4 of the water storage surface 20 increases (generates) in all regions at time G1. Furthermore, it is known that the kinetic energy (cumulative value) of the four regions S1, S2, S3, and S4 reaches a predetermined value J1 when there is a time difference of less than 1 second (i.e., time T1).

[0092] In this comparative example of the present embodiment, the kinetic energy (cumulative value) of the washing water flowing into each region S1, S2, S3, and S4 of the water storage surface 20 increases (generates) in all regions when time G2 is reached. Furthermore, it is known that the kinetic energy (cumulative value) of the four regions S1, S2, S3, and S4 reaches the predetermined value J1 when there is a time difference of more than 1 second (i.e., time T2).

[0093] Next, according to Figure 7 The following describes the situation where the washing water of the water-washing toilet 1 in this embodiment flows into the water storage surface. Figure 7 This is a top view of the basin portion showing the washing water discharged from the first and second water outlets of the water-washing toilet in this embodiment flowing into the water storage surface.

[0094] like Figure 7 As shown, firstly, the main stream F1 of the washing water discharged from the first outlet 24 flows through the front area on the right side of the dirt receiving surface 16 of the basin 6, then reaches the rear area of ​​the dirt receiving surface 16, and then flows into (downwards) the areas S2 and S1 of the water storage surface 20.

[0095] Next, the main stream F2 of the washing water discharged from the first outlet 26 flows through the rear area on the left side of the dirt receiving surface 16 of the basin 6, reaches the front area of ​​the dirt receiving surface 16, and then flows into (down) the areas S4 and S3 of the water storage surface 20.

[0096] according to Figure 7 It can be seen that in the water-washing toilet 1 of this embodiment, the front mainstream F1 and the rear mainstream F2 of the washing water will not merge and flow into the water storage surface 20.

[0097] Furthermore, the main stream F1 at the front and the main stream F2 at the back of the washing water flow into the four regions S1, S2, S3, and S4, which have different boundaries.

[0098] The effects of the first embodiment described above will be explained below.

[0099] First, in the water-washing toilet 1 of this embodiment, the front mainstream F1 and rear mainstream F2 of the washing water discharged from the first outlet 24 and the second outlet 26 are configured to swirl on the waste receiving surface 16 of the basin 6. At the initial stage of washing, the water flowing into the water storage surface is divided into three or more of the four regions S1, S2, S3, and S4 by the front-back direction center line and the left-right direction center line. The front-back direction center line and the left-right direction center line divide the water storage surface 20 in two in the front-back direction and the left-right direction from a top view. Therefore, according to this embodiment, at the initial stage of washing, the washing water flows into three or more of the four regions S1, S2, S3, and S4 of the water storage surface. Therefore, the timing of the discharge of floating waste can be advanced. Furthermore, by applying pressure to the entire water storage surface 20, the water storage surface 20 will not be unstable, thereby improving the discharge force of floating waste.

[0100] Next, in the water-washing toilet 1 of this embodiment, the prescribed energy of the washing water flowing into the water storage surface 20 reaches three or more of the four regions S1, S2, S3, and S4 of the water storage surface within 1 second. Therefore, the pressing pressure applied to the water storage surface 20 can be fixed, the instability of the water storage surface 20 can be suppressed, and floating debris can be discharged.

[0101] Next, in the water-washing toilet 1 of this embodiment, by forming a front mainstream F1 and a rear mainstream F2 of washing water, the entire waste receiving surface 16 of the basin 6 can be washed and the discharge performance of floating waste can be improved.

[0102] Next, in the water-washing toilet 1 of this embodiment, since the front mainstream F1 and the rear mainstream F2 of the washing water do not merge and flow into the water storage surface 20, it is easy to keep the energy of the washing water flowing into three or more areas constant, which can suppress the instability of the water storage surface 20 and enable the discharge of floating dirt.

[0103] Next, in the water-washing toilet 1 of this embodiment, the front mainstream F1 and the rear mainstream F2 of the washing water flow into regions with different boundaries, which are divided into four regions S1, S2, S3, and S4, respectively. That is, they do not flow into the same region. Therefore, it is easy to make the pressing pressure applied to the water storage surface 20 fixed and to suppress the instability of the water storage surface 20.

[0104] Next, in the water-washing toilet 1 of this embodiment, the flushing water flows from the first spout 24 and the second spout 26 into the area on the side where the spout is not provided. The flushing water does not swirl around the basin surface 6 but flows directly into the water storage surface 20. Therefore, the timing of the flushing water flowing into the water storage surface 20 can be advanced.

[0105] Next, according to Figure 2 and Figure 8 and even Figure 14 The second embodiment of the water-washing toilet 101 of the present invention will be described.

[0106] First, according to Figure 8 and even Figure 10 The specific shapes of the waste receiving surface 16 and the pot part 22 of the water-washable toilet 101 are explained.

[0107] First, such as Figure 8 As shown, the rear surface 40 of the waste receiving surface 16 of the basin 6 has a recess 40a that is deeper than the left and right side surfaces 16a of the waste receiving surface 16. The lower end 40b of the rear surface 40 with the recess 40a extends downward relative to the upper end 22c of the right side surface 22a and the left side surface 22b of the pot 22.

[0108] like Figure 9 As shown, the rear surface 40 of the waste-receiving surface 16 of the basin portion 6 is connected to the rear end 22d of the pot portion 22 and the connecting portion 42. The rear surface 40 of the waste-receiving surface 16 is concave in the vertical direction, while the connecting portion 42 is convex, and the rear surface 40 and the connecting portion 42 are smoothly connected by a bend. This connecting portion 42 corresponds to the lower end 40b of the rear surface 40 of the waste-receiving surface 16.

[0109] like Figure 10 As shown, in a top view, the lateral width W2 of the recess 40a of the rear surface 40 of the dirt receiving surface 16 of the basin 6 is narrower than the maximum lateral width W1 of the pot 22.

[0110] Next, according to Figure 2 , Figure 11 and Figure 12 The shape of the rear part 22d of the pot part 22 will be explained.

[0111] like Figure 11 As shown, the upper part of the rear 22d of the pot section 22 is formed by the radius of curvature R1, as... Figure 12 As shown, the area below the rear end 22d of the pot portion 22 is formed by a radius of curvature R2. Here, the radius of curvature R2 is a smaller value than the radius of curvature R1 (R1 > R2). Therefore, as... Figure 8 As shown, the radius of curvature R2 of the lower position of the rear part 22d of the kettle part 22 is close to the radius of curvature of the rear side of the inlet 10a of the drain pipe 10, so that the flow of washing water from the kettle part 22 to the drain pipe 10 becomes smooth.

[0112] Next, according to Figure 13 and Figure 14 The flow of the washing water is explained.

[0113] First, such as Figure 13 As shown, the main stream F2 of the washing water discharged from the second spout 26 passes over the rear surface 40 of the dirt receiving surface 16. However, at this time, due to the recess 41a, it will not continue to swirl on the dirt receiving surface 16, but will flow along the left side 22b of the pot 22, and will flow into (flow down) the fourth region S4 and the third region S3 of the water storage surface 20.

[0114] Next, as Figure 14 As shown, the main stream F1 of the washing water discharged from the first spout 24 flows from the dirt receiving surface 16 along the right side 22a of the pot 22. Next, it collides with the recess 40a of the rear surface 40 of the dirt receiving surface 16. The flow direction of the main stream F1 changes from the front-to-back direction to the lateral direction. The main stream F1 flows into (flows down) the second region S2 and the first region S1 of the water storage surface 20.

[0115] The effects of the water-washing toilet according to the second embodiment of the present invention will be explained below.

[0116] First, in the water-washing toilet 101 of this embodiment, the rear surface 40 of the waste receiving surface 16 of the basin 6 has a recess 40a that is more deeply recessed than the left and right side surfaces 16a of the waste receiving surface 16. This rear surface 40 extends downward from the upper end 22c of the left and right side surfaces 22a and 22b of the pot 22. Therefore, the main flow F1 of the washing water passes through the side of the pot 22 and reaches the rear surface 40 of the waste receiving surface 16. At this rear surface 40, the direction of the water flow changes and becomes a water flow that flows directly along the rear surface 40 of the waste receiving surface 16 into the water storage surface 20. As a result, according to this embodiment, the front mainstream F1 of the washing water can be guided to the water storage surface 20 earlier than the water that swirls at the dirt receiving surface 16 and then flows into the water storage surface 20. Therefore, the front mainstream F1 and the rear mainstream F2 can be guided to the water storage surface 20 at almost the same time, thereby improving the discharge performance of floating dirt.

[0117] Next, as with the water-washing toilet in Patent Document 1, if the rear recess of the waste-receiving surface of the basin is wider than the lateral width of the pot, there is a possibility that the washing water swirling from the front on the side of the pot may diffuse, causing a delay in its flow to the water storage surface. In this embodiment of the water-washing toilet 101, the lateral width W2 of the recess 40a of the rear surface 40 of the waste-receiving surface 16 of the basin 6 is made narrower than the maximum lateral width W1 of the pot 22. Therefore, the diffusion of washing water swirling from the front on the side of the pot 22 can be suppressed, and the main flow F1 of the washing water can flow into the water storage surface 20 earlier.

[0118] Next, in the water-washing toilet 101 of this embodiment, the recess 40a of the rear surface 40 of the waste receiving surface 16 of the basin 6 is formed in a concave shape along the vertical direction, and its lower end is connected to the rear 22d of the pot 22 through the convex connecting part 42. Therefore, the washing water can be smoothly guided to the water storage surface 20.

[0119] Next, in the water-washing toilet 101 of this embodiment, for the radius of curvature R1 at the upper position and the radius of curvature R2 at the lower position of the rear end 22d of the pot 22, since the radius of curvature R2 at the lower position is formed to be smaller than the radius of curvature R1 at the upper position (R1>R2), the flow of washing water flowing from the pot 22 to the drain pipe 10 becomes smoother, and the performance of waste discharge is improved.

[0120] Next, according to Figure 15 , Figure 16 , Figure 17A , Figure 17B The third embodiment of the water-washing toilet 201 of the present invention will be described.

[0121] First, according to Figure 15The location of the water outlet (inner edge water outlet) of the basin part of the water-washing toilet in the third embodiment will be described in detail. Figure 15 This is a top cross-sectional view of the water-washing toilet according to this embodiment. In this third embodiment, for ease of explanation, the first water outlet 24 and the second water outlet 26 are described as the first inner edge water outlet 24 and the second inner edge water outlet 26.

[0122] like Figure 15 As shown, the top view of the basin 6 is divided into nine regions, and the position of the inner edge water outlet of the water-washing toilet 201 of this embodiment will be explained. The top view of the basin 6 is divided into nine regions (f1~f3, m1~m3, r1~r3) by the extension line X1 extending in the left-right direction at the front end s1 of the water storage surface 20, the extension line X2 extending in the left-right direction at the rear end s2 of the water storage surface 20, the extension line Y1 extending in the front-back direction at the left end s3 of the water storage surface 20, and the extension line Y2 extending in the front-back direction at the right end s4 of the water storage surface 20.

[0123] Specifically, the top view of the basin 6 is divided into a front region (f1-f3) located further forward than the front end s1 of the water storage surface 20, a lateral region (m1-m3) located between the front end s1 and the rear end s2 of the water storage surface 20, and a rear region (r1-r3) located further backward than the rear end s2 of the water storage surface 20. Furthermore, the front region is divided into a left front region f1 located further to the left of the left end s3 of the water storage surface 20, a middle front region f2 located between the left end s3 and the right end s4 of the water storage surface 20, and a right front region f3 located further to the right of the right end s4 of the water storage surface 20. Similarly, starting from the left, the lateral regions are divided into a left lateral region m1, a middle lateral region m2, and a right lateral region m3; and starting from the left, the rear regions are divided into a left rear region r1, a middle rear region r2, and a right rear region r3.

[0124] In this embodiment, the water storage surface 20 is formed in the central side region m2 of the basin 6. The first inner edge outlet 24 is disposed in the left front region f1, which is further forward than the front end s1 (extension line X1) of the water storage surface 20 and further to the left than the left end s3 (extension line Y1) of the water storage surface 20. Furthermore, the first inner edge outlet 24 is disposed upstream of the front end of the basin 6, which has the smallest radius of curvature, when viewed from above.

[0125] The second inner edge water outlet 26 is located in the right rear region r3, which is further rearward than the rear end s2 (extension line X2) of the water storage surface 20 and further to the right than the right end s4 (extension line Y2) of the water storage surface 20. Furthermore, the second inner edge water outlet 26 is located near the rear end of the basin 6.

[0126] The first inner edge water outlet 24 and the second inner edge water outlet 26 are respectively arranged in the left front region f1 and the right rear region r3, which are diagonally arranged in a manner that sandwich the intersection point O of the center line X and the center line Y. The center line X bisects the front-back direction of the water storage surface 20, and the center line Y bisects the left-right direction of the water storage surface 20.

[0127] It should be noted that in this embodiment, the first inner edge water outlet 24 is disposed in the left front region f1 and the second inner edge water outlet 26 is disposed in the right rear region r3. However, it is also possible to replace it by disposing of the first inner edge water outlet 18 in the right front region f3 and the second inner edge water outlet 26 in the left rear region r1.

[0128] Next, refer to Figure 16 , Figure 17A and Figure 17B While comparing Existing Example 1 and Existing Example 2, the flow of washing water in the water-washing toilet of this embodiment will be explained.

[0129] Regarding the first inner edge water outlet, in the existing example 1 (refer to...) Figure 17A In the first inner edge water outlet 124, the water outlet 124 is located in the left side region m1 between the front end s1 and the rear end s2 of the water storage surface 20. Therefore, the washing water discharged from the first inner edge water outlet 124 will not flow into the water storage surface 20 at the left side region m1, but will flow into the front region (f1~f3) after passing through the left side region m1, and then flow into the water storage surface 20 from the front side (refer to the reference). Figure 17A (The arrow). In this embodiment (refer to...) Figure 16 In the first inner edge water outlet 24, the water outlet 24 is located in the left front region f1, which is further forward than the front end s1 of the water storage surface 20. Therefore, the washing water discharged from the first inner edge water outlet 24 flows forward into the forward region (f1 to f3) without passing through other regions, and can flow into the water storage surface 20 from the front side (see reference). Figure 16 (arrow).

[0130] Regarding the second inner edge water outlet, in existing example 2 (refer to...) Figure 17B In the process, the second inner edge water outlet 226 is located in the right side region m3 between the front end s1 and the rear end s2 of the water storage surface 20. Therefore, the washing water discharged from the second inner edge water outlet 226 to the rear does not flow into the water storage surface S at the right side region m3, but flows into the rear region (r1~r3) after passing through the right side region m3, and then flows into the water storage surface 20 from the rear side (refer to the reference). Figure 17B (The arrow). In this embodiment (refer to...) Figure 16In the second inner edge water outlet 26, the water outlet 26 is located in the right rear region r3, which is further rearward than the rear end s2 of the water storage surface 20. Therefore, the washing water discharged from the second inner edge water outlet 26 flows to the rear region (r1~r3) without passing through other regions, and can flow into the water storage surface 20 from the rear side (see reference). Figure 16 (arrow).

[0131] In this embodiment (refer to) Figure 16 In this embodiment, the first inner edge water outlet 24 is located in the left front region f1, which is further forward than the front end S1 of the water storage surface 20, and the second inner edge water outlet 26 is located in the right rear region r3, which is further rear than the rear end S2 of the water storage surface 20. At the start of the washing process, the washing water discharged forward from the first inner edge water outlet 24 and the washing water discharged rearward from the second inner edge water outlet 26 flow into the water storage surface 20 earlier and approximately simultaneously compared to existing embodiments (see reference). Figure 16 (arrow).

[0132] Next, the effects of the water-washing toilet 20 according to the third embodiment of the present invention will be explained.

[0133] In the flush toilet 201 of this embodiment, the first inner edge spout 24 is located in the inner space of the basin 6, further forward than the front end s1 of the water storage surface 20, and flushing water is discharged forward from the first inner edge spout 24. Furthermore, the second inner edge spout 26 is located in the basin 6, further rearward than the rear end s2 of the water storage surface 20, and flushing water is discharged rearward from the second inner edge spout 26. Therefore, at the start of flushing, the flushing water from the first inner edge spout 24 and the second inner edge spout 26 can flow into the water storage surface 20 earlier and approximately simultaneously, allowing the flushing water to flow evenly across the entire water storage surface 20. Thus, in a flush toilet where all the flushing water supplied to the toilet body 2 is discharged from the inner edge spouts, floating debris can be adequately discharged.

[0134] Furthermore, in the water-washing toilet 201 of this embodiment, preferably, the first inner edge water outlet 24 and the second inner edge water outlet 26 are arranged further to the left than the left end s3 of the water storage surface 20 or further to the right than the right end s4 of the water storage surface 20. Therefore, when washing begins, the washing water from the first inner edge water outlet 24 and the second inner edge water outlet 26 can flow into the water storage more simultaneously, and the washing water can flow evenly into the entire water storage surface 20.

[0135] In the water-washing toilet 201 of this embodiment, preferably, the first inner edge water outlet 24 and the second inner edge water outlet 26 are respectively arranged diagonally in the area that is sandwiched between the intersection point O of the center line X and the center line Y, when viewed from a top view. The center line X bisects the front-to-back direction of the water storage surface 20, and the center line Y bisects the left-to-right direction of the water storage surface 20. Therefore, when washing begins, the washing water from the first inner edge water outlet 24 and the second inner edge water outlet 26 can flow into the water storage surface 20 more simultaneously, and the washing water can flow evenly into the entire water storage surface 20.

[0136] In this embodiment, a flush toilet with two inner edge water outlets is described; however, the present invention is not limited to this and can also be applied to flush toilets with three or more inner edge water outlets. In this case, the three or more inner edge water outlets can be distributed in one of the aforementioned left front region f1, right front region f3, left rear region r1, or right rear region r3.

[0137] Next, further explanation will be given regarding the water-washing toilet of this embodiment. In the water-washing toilets 1, 101, and 201 of this embodiment, as shown above, the basin 6 is provided with a jug portion 22, and a water storage surface 20 is formed inside the jug portion 22. The jug portion 22 has a roughly triangular shape when viewed from above. Figure 8 and Figure 9 As shown, the height of the upper ends 22c of the right side 22a and the left side 22b of the pot section 22 is formed to decrease as it faces forward. Therefore, it can function as an inflow promoting mechanism. By causing the rear mainstream F2 to flow along the left side 22b of the upper end 22c, whose height is approximately fixed, at the inclined portion that decreases as it faces forward of the upper end 22c, the flow along the upper end 22c deviates from the direction of change of the upper end 22c due to the change point of the upper end 22c, and changes from the left side 22b towards the direction of inflow into the water storage surface 20. As a result, the rear mainstream F2 surrounds the side of the pot section 22, suppressing the delay of inflow into the water storage surface 20. Since the upper end 22c of the right side 22a is formed to rise from the front to the rear, it can function as an inflow promoting mechanism, causing the main flow F1 to flow along the right side 22a. At the inclined part that rises from the rear of the upper end 22c, the flow along the upper end 22c easily changes from the right side 22b to the direction of flowing into the water storage surface 20. The main flow F1 surrounds the side of the pot 22, suppressing the delay of the inflow to the water storage surface 20.

[0138] Furthermore, the height of the upper edges 22c of the two side surfaces 22a and 22b of the jug section 22 decreases as it faces forward. Therefore, the rear mainstream F2, which flows down from the rear of the jug section 22 and along the left side surface 22b, collides with the front of the jug section 22 and rises after flowing into the water storage surface 20. At this time, the rear mainstream F1 flows from the front area of ​​the waste receiving surface 16 of the basin section 6 towards the jug section 22. At the front of the jug section 22, the rear mainstream F2 merges with the front mainstream F1, resulting in a strong surging flow that improves waste discharge performance.

Claims

1. A water-washing toilet, which cleans and discharges waste using washing water, and has the following features: The basin has a waste receiving surface for receiving waste, an inner edge formed on the upper part of the waste receiving surface, and a pot part formed on the lower part of the waste receiving surface and having a water storage surface formed therein. The first and second water outlets discharge washing water along their inner edges, wherein... The first water outlet forms the main flow at the front, and the second water outlet forms the main flow at the rear. The first water outlet is formed on one side of the front area of ​​the waste-receiving surface of the basin, and the second water outlet is formed on the other side of the rear area of ​​the waste-receiving surface of the basin. A drain pipe, which is connected to the bottom of the basin. The first water outlet is located in front of the front end of the water storage surface, and the second water outlet is located behind the rear end of the water storage surface. The front and rear main flows are configured to swirl and flow over the waste-receiving surface of the basin. During the initial inflow period—from the start of the washing water flowing into the water storage surface to the cessation of the washing water flowing into the water storage surface—the water flowing into the water storage surface is divided into at least three of four regions by the front-back center line and the left-right center line. These front-back and left-right center lines divide the water storage surface in two in the front-back and left-right directions from a top-down perspective. The prescribed energy of the washing water flowing into the water storage surface is such that it reaches three or more of the four zones of the water storage surface within 1 second.

2. The water-washing toilet according to claim 1, wherein, The main stream at the front and the main stream at the rear of the washing water are configured to not merge but flow into the water storage surface.

3. The water-washing toilet according to claim 1, wherein, The main and rear streams of the washing water flow into different areas that are divided into four zones.

4. The water-washing toilet according to claim 1, wherein, The main flow in front mainly flows into the area behind one of the left and right sides of the water storage surface divided into four regions, which does not have a first outlet. The main flow in the rear mainly flows into the area in front of one of the left and right sides of the water storage surface divided into four regions, which does not have a second outlet.

5. The water-washing toilet according to claim 1, wherein, The rear surface of the waste-receiving surface of the basin has a recess that is deeper than the left and right sides of the waste-receiving surface, and the rear surface extends downward relative to the upper end of the left and right sides of the pot.

6. The water-washing toilet according to claim 5, wherein, The recess on the rear surface of the waste-receiving surface of the basin is formed such that its lateral width is narrower than the maximum lateral width of the pot.

7. The water-washing toilet according to claim 5, wherein, The concave portion of the rear surface of the waste receiving surface of the basin is formed in a concave shape along the vertical direction, and its lower end is connected to the rear of the pot through a convex connecting portion.

8. The water-washing toilet according to claim 5, wherein, For the upper and lower curvature radii R1 and R2 of the rear of the pot, the lower curvature radius R2 is formed to be smaller than the upper curvature radius R1.

9. The water-washing toilet according to claim 1, wherein, The first and second water outlets are positioned further to the left of the water storage surface or further to the right of the water storage surface.

10. The water-washing toilet according to claim 1, wherein, The first and second water outlets are respectively arranged diagonally in the area where they intersect the center line that bisects the water storage surface in the left-right direction and the center line that bisects the water storage surface in the front-back direction, from a top-down perspective.

Images