Flush toilet bowl

Abstract

To suppress the generation of abnormal noise.SOLUTION: A flush toilet bowl according to an embodiment comprises a bowl part, a trap part, a jet water spouting part. The jet water spouting part has a jet water conduit and a jet water spout. The jet water conduit is formed so that washing water flows therethrough. The jet water spout is formed at the tip of the jet conduit, and jets washing water toward the trap part. The jet water conduit has a contracted part. The cross-sectional area of the contracted part becomes smaller toward the jet water spout side. The cross-sectional area of the jet water spout is the smallest among the cross-sectional areas of the jet water conduit. The reduction rate of the width of the top surface of the contracted part in the flow direction of the washing water of the jet water conduit is smaller than the reduction rate of the width of the bottom surface of the contracted part in the flow direction. The angle between at least one of the side surfaces of the jet water conduit and the top surface of the jet water conduit is an acute angle.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] 2. Description of the Related Art Flush toilets that spout flush water from a rim spout and a jet spout to expel waste are known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

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

[0004] The flush toilet described above suppresses the generation of abnormal noises when water is ejected from the jet spout. However, there is room for further improvement in the generation of abnormal noises in the flush toilet described above.

[0005] An object of one aspect of the embodiment is to provide a flush toilet that suppresses the generation of abnormal noise. [Means for solving the problem]

[0006] A flush toilet according to one aspect of the embodiment includes a bowl section, a trap section, and a jet water spout section. The bowl section receives waste. The trap section is connected to the bowl section so as to discharge waste from the bowl section. The jet water spout section spouts flush water from the front of the trap section toward the trap section. The jet water spout section has a jet water conduit and a jet water outlet. The jet water conduit is formed so that flush water flows through it. The jet water outlet is formed at the tip of the jet water conduit and spouts flush water toward the trap section. The jet water conduit has a contraction section. The cross-sectional area of ​​the contraction section decreases toward the jet water outlet side. The cross-sectional area of ​​the jet water outlet is the smallest among the cross-sectional areas of the jet water conduit. The reduction ratio of the width of the top surface of the contraction section in the flow direction of flush water in the jet water conduit is smaller than the reduction ratio of the width of the bottom surface of the contraction section in the flow direction. At least one of the side surfaces of the Z water channel forms an acute angle with the top surface of the Z water channel.

[0007] As a result, the flush toilet can fragment the air in the jet water channel by causing a change in the flow speed of the flush water in the contraction section. Also, the flush toilet can fragment the air floating on the top side of the contraction section by increasing the change in the flow speed of the flush water on the top side of the contraction section. Also, by making the angle between the side of the jet water channel and the top surface of the jet water channel an acute angle, the flush toilet can fragment the air that has accumulated between the top surface and the side surface by flush water that flows at a slower speed near the top surface. As a result, the flush toilet can suppress pressure changes in the jet water channel and suppress the generation of abnormal noise.

[0008] The jet water channel also has a curved portion that is connected to the contraction portion and changes the flow direction of the wash water from rear to front to front to rear.

[0009] This allows the flush toilet to fragment the air using the contraction section located downstream of the curved section in the flow direction of the flush water flowing through the jet water conduit.As a result, the flush toilet can spray flush water containing fragmented air from the jet spout.As a result, the flush toilet can suppress the generation of abnormal noises caused by flush water sprayed from the jet spout.

[0010] Furthermore, at least one of the side surfaces of the contraction portion forms an acute angle with the top surface of the contraction portion.

[0011] This allows the flush toilet to break down the air that has accumulated between the top surface of the contraction section and the side surface of the contraction section using flush water that flows at a slower rate near the top surface, thereby enabling the flush toilet to suppress pressure changes in the contraction section and the generation of abnormal noise.

[0012] In addition, the distance between the top surface of the contraction portion and the bottom surface of the contraction portion gradually becomes shorter toward the jet outlet side.

[0013] This allows the flush toilet to eject flush water from the jet outlet with little bias in the vertical direction while suppressing the generation of abnormal noises in the jet water conduit. Therefore, the flush toilet can suppress a decrease in the dischargeability of waste caused by flush water ejected from the jet outlet while suppressing the generation of abnormal noises.

[0014] In addition, the distance between the sides of the contraction portion gradually becomes shorter toward the jet outlet side.

[0015] This allows the flush toilet to eject flush water from the jet outlet with little bias in the left-right direction while suppressing the generation of abnormal noises in the jet water conduit. Therefore, the flush toilet can suppress a decrease in the dischargeability of waste caused by flush water ejected from the jet outlet while suppressing the generation of abnormal noises. Effect of the Invention

[0016] According to one aspect of the embodiment, the generation of abnormal noise can be suppressed. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view of a flush toilet according to an embodiment. [Diagram 2] FIG. 2 is a plan view of the flush toilet according to the embodiment. [Diagram 3] FIG. 3 is a side view of the flush toilet according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. [Diagram 5] FIG. 5 is a schematic diagram showing the shape of the jet water channel in the VV cross section of FIG. [Figure 6] FIG. 6 is a schematic diagram showing the shape of the jet water channel in a cross section taken along line VI-VI in FIG. [Figure 7] FIG. 7 is a schematic diagram showing the shape of the jet water channel in a cross section taken along line VII-VII in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Below, an embodiment of a flush toilet disclosed in this application will be described in detail with reference to the attached drawings. Note that the invention is not limited to the embodiment shown below. It should be noted that the drawings are schematic, and the dimensional relationships of each element, the ratios of each element, and the like may differ from reality. There may also be parts in which the dimensional relationships and ratios differ between the drawings.

[0019] A flush toilet 1 according to an embodiment will be described with reference to Figs. 1 to 7. Fig. 1 is a perspective view of a flush toilet 1 according to an embodiment. Fig. 2 is a plan view of a flush toilet 1 according to an embodiment. Fig. 3 is a side view of a flush toilet 1 according to an embodiment. Fig. 4 is a cross-sectional view taken along IV-IV in Fig. 3. Fig. 5 is a schematic diagram showing the shape of the jet water channel 20 in the VV cross section of Fig. 4. Fig. 6 is a schematic diagram showing the shape of the jet water channel 20 in the VI-VI cross section of Fig. 4. Fig. 7 is a schematic diagram showing the shape of the jet water channel 20 in the VII-VII cross section of Fig. 4.

[0020] For ease of explanation, Fig. 1 and other figures show a three-dimensional Cartesian coordinate system including a Z-axis whose positive direction is vertically upward. In the Cartesian coordinate system, the positive X-axis direction is defined as the left, and the negative X-axis direction is defined as the right. The positive Y-axis direction is defined as the front, and the negative Y-axis direction is defined as the rear. The X-axis direction is called the left-right direction, the Y-axis direction is called the front-back direction, and the Z-axis direction is called the up-down direction.

[0021] The flush toilet 1 is installed in a toilet room. The flush toilet 1 is a wall-hung type that is attached to the wall of the toilet room. However, the flush toilet 1 may also be a floor-standing type that is installed on the floor of the toilet room.

[0022] The flush toilet 1 comprises a toilet body 2. The flush toilet 1 comprises functional parts that are attached to the toilet body 2. The functional parts include, for example, a toilet seat, a sanitary flushing device, a water tank, and a pressure pump.

[0023] The toilet body 2 is made of, for example, ceramic. The toilet body 2 comprises a bowl portion 3, a rim portion 4, a rim water spout portion 5, a jet water spout portion 6, a drain trap 7 (trap portion), and an attachment portion 8. The bowl portion 3 receives waste from the user. The rim portion 4 is formed on the upper edge of the bowl portion 3.

[0024] The rim water outlet section 5 includes a rim water conduit 10 and a rim water outlet 11. The rim water conduit 10 communicates with a common water conduit 15. The common water conduit 15 is provided behind the bowl section 3. Flush water is supplied to the common water conduit 15 from a water storage tank. The rim water conduit 10 is formed along the rim section 4 from the rear of the bowl section 3 towards the right.

[0025] The rim spout 11 is formed at the tip of the rim water conduit 10. The rim spout 11 is formed at the tip of the rim water conduit 10 in the direction of flush water flow, i.e., at the downstream end of the rim water conduit 10 in the direction of flush water flow. The rim spout 11 is formed to the right of the rim section 4. The rim spout 11 spouts flush water flowing through the rim water conduit 10 into the rim section 4. The flush water spouted from the rim spout 11 swirls along the rim section 4 while flowing into the bowl section 3, forming a swirling flow. The bowl section 3 is cleaned by the swirling flow formed in this way. Waste in the bowl section 3 is washed to the bottom of the bowl section 3 by the swirling flow.

[0026] The jet water outlet 6 sprays flush water from the front of the drain trap 7 toward the drain trap 7. The jet water outlet 6 includes a jet water conduit 20 and a jet water outlet 21. The jet water conduit 20 communicates with the common conduit 15. The jet water conduit 20 is formed from the rear of the bowl portion 3 toward the left. The jet water conduit 20 is formed from the rear of the bowl portion 3 diagonally downward along the bowl portion 3.

[0027] The jet conduit 20 includes a curved portion 23 and a contracted portion 24. The curved portion 23 is provided forward of the drain trap 7. The curved portion 23 is formed to change the flow of flush water in the jet conduit 20 from rear to front to front to rear. In the flow direction of flush water flowing in the jet conduit 20, the downstream end of the curved portion 23 is connected to the contracted portion 24.

[0028] The contraction section 24 is provided forward of the drain trap 7. The contraction section 24 is provided such that the cross-sectional area in a cross section perpendicular to the front-to-rear direction becomes smaller from the front to the rear. The contraction section 24 may be provided such that the cross-sectional area in a cross section perpendicular to the flow direction of the flush water flowing through the contraction section 24 becomes smaller from the upstream side to the downstream side in the flow direction of the flush water flowing through the contraction section 24.

[0029] The Z outlet 21 is formed at the tip of the Z water conduit 20. That is, the Z outlet 21 is formed at the tip of the contraction section 24. The Z outlet 21 is formed at the tip of the Z water conduit 20 in the direction of the flush water flow, that is, at the downstream end of the Z water conduit 20 in the direction of the flush water flow. The Z outlet 21 spouts flush water flowing through the Z water conduit 20 toward the drain trap 7. The flush water spouted from the Z outlet 21 flows into the drain trap 7 while drawing in the accumulated water stored in the bowl section 3. As a result, waste washed away by the flush water spouted from the rim outlet 11 is discharged into the drain trap 7.

[0030] For example, the cross-sectional area of ​​the contracted portion 24 in a cross section perpendicular to the front-rear direction decreases from the front to the rear as shown in Figures 5 to 7. Figure 7 is a cross-sectional view of the contracted portion 24 including the jet water spout 21.

[0031] The cross-sectional area of ​​the jet water outlet 21 is the smallest among the cross-sectional areas of the jet water conduit 20. The width of the top surface 24a of the contraction section 24 gradually decreases from the front to the rear. The width of the top surface 24a of the contraction section 24 changes from W1 to W2 to W3 from the front to the rear in the cross sections shown in Figures 5 to 7.

[0032] Additionally, the width of bottom surface 24b of contraction portion 24 gradually decreases from the front to the rear. The width of bottom surface 24b of contraction portion 24 changes from W4 to W5 to W6 from the front to the rear in the cross sections shown in Figures 5 to 7. The width of top surface 24a of contraction portion 24 and the width of bottom surface 24b of contraction portion 24 are the length of top surface 24a in the left-right direction.

[0033] The reduction ratio of the width of the top surface 24a of the contraction portion 24 is smaller than the reduction ratio of the width of the bottom surface 24b of the contraction portion 24. The reduction ratio is the ratio of the downstream width of the wash water flowing through the Z conduit 20 to the upstream width of the wash water flowing through the Z conduit 20. The reduction ratio is calculated by dividing the downstream width of the wash water flowing through the Z conduit 20 by the upstream width of the wash water flowing through the Z conduit 20.

[0034] The width reduction rate r1 of the top surface 24a of the contraction portion 24 is W3 / W1. The width reduction rate r2 of the bottom surface 24b of the contraction portion 24 is W6 / W4. The width reduction rate r1 of the top surface 24a of the contraction portion 24 is smaller than the width reduction rate r2 of the bottom surface 24b of the contraction portion 24.

[0035] In addition, the reduced width of the top surface 24a of the contraction portion 24 is greater than the reduced width of the bottom surface 24b of the contraction portion 24. The reduced width is the difference between the upstream width of the wash water flowing through the jet conduit 20 and the downstream width of the wash water flowing through the jet conduit 20. The reduced width d1 of the top surface 24a of the contraction portion 24 is W1-W3. The reduced width d2 of the bottom surface 24b of the contraction portion 24 is W4-W6. The reduced width d1 of the top surface 24a of the contraction portion 24 is greater than the reduced width d2 of the bottom surface 24b of the contraction portion 24.

[0036] The height from bottom surface 24b of contraction portion 24 to top surface 24a of contraction portion 24 gradually decreases from the front to the rear. The height from bottom surface 24b of contraction portion 24 to top surface 24a of contraction portion 24 changes from H1, H2, to H3 from the front to the rear in the cross sections shown in Figures 5 to 7.

[0037] Of the side surfaces 24c connecting the top surface 24a of the contraction portion 24 to the bottom surface 24b of the contraction portion 24, at least one side surface 24c forms an acute angle with the top surface 24a of the contraction portion 24. For example, the contraction portion 24 is formed such that the angles between two side surfaces 24c and the top surface 24a are acute angles.

[0038] The distance between the side surfaces 24c of the contraction portion 24 becomes gradually shorter from the front to the rear. That is, the distance between the side surfaces 24c of the contraction portion 24 becomes gradually shorter toward the jet outlet 21. The distance between the side surfaces 24c of the contraction portion 24 is the distance between two opposing side surfaces 24c.

[0039] Drain trap 7 communicates with the bottom of bowl portion 3. Drain trap 7 extends from the bottom of bowl portion 3 to drain waste within bowl portion 3. Drain trap 7 includes an upflow pipe 7a and a downflow pipe 7b.

[0040] The rising pipe 7a communicates with the lower end of the bowl portion 3. The rising pipe 7a extends from the lower end of the bowl portion 3 toward the side wall surface, that is, obliquely upward toward the rear.

[0041] The downcomer pipe 7b is connected to the rear end of the upcomer pipe 7a. The downcomer pipe 7b is connected to a drain pipe provided on the wall through a drain socket.

[0042] The mounting part 8 is provided between the bowl part 3 and the wall surface. The mounting part 8 is provided at the rear end of the toilet body 2. The mounting part 8 mounts the flush toilet 1 to the wall surface via mounting members. The mounting members are, for example, bolts and nuts.

[0043] In the flush toilet 1, a contraction section 24 is provided in which the cross-sectional area of ​​the jet water channel 20 becomes smaller in the direction of the flush water flow, which makes it easy for changes to occur in the flow speed of the flush water flowing through the jet water channel 20. For this reason, the air in the jet water channel 20, for example, the air contained in the flush water flowing through the jet water channel 20, and the air that has accumulated in the jet water channel 20, is subdivided by the contraction section 24.

[0044] In addition, the contraction rate of the top surface 24a is smaller than the contraction rate of the bottom surface 24b in the contraction portion 24. Therefore, the flow rate of the flush water is more likely to change in the contraction portion 24, and the air in the jet water channel 20 is further divided by the contraction portion 24.

[0045] Furthermore, by forming an acute angle between the top surface 24a of the contraction portion 24 and the side surface 24c of the contraction portion 24, the air that has accumulated between the top surface 24a and the side surface 24c is broken down by the cleaning water, which has a slow flow rate near the top surface 24a.

[0046] By dividing the air in the Z water conduit 20, pressure changes in the Z water conduit 20 caused by bursts of air are suppressed. Therefore, abnormal noises of the wash water flowing through the Z water conduit 20 and the wash water sprayed from the Z water outlet 21 are suppressed.

[0047] The flush toilet 1 comprises a bowl portion 3, a drain trap 7, and a jet water outlet portion 6. The bowl portion 3 receives waste. The drain trap 7 is connected to the bowl portion 3 so as to discharge waste from the bowl portion 3. The jet water outlet portion 6 spouts flush water from the front of the drain trap 7 toward the drain trap 7. The jet water outlet portion 6 has a jet water conduit 20 and a jet water outlet 21. The jet water conduit 20 is formed so that flush water flows through it. The jet water outlet 21 is formed at the tip of the jet water conduit 20, and spouts flush water toward the drain trap 7. The jet water conduit 20 has a contraction portion 24. The cross-sectional area of ​​the contraction portion 24 decreases toward the jet water outlet 21 side. The cross-sectional area of ​​the jet water outlet 21 is the smallest among the cross-sectional areas of the jet water conduit 20. The reduction ratio of the width of the top surface 24a of the contraction portion 24 in the flow direction of the wash water in the jet conduit 20 is smaller than the reduction ratio of the width of the bottom surface 24b of the contraction portion 24 in the flow direction of the wash water in the jet conduit 20. At least one of the side surfaces 24c of the contraction portion 24 forms an acute angle with the top surface 24a of the contraction portion 24.

[0048] As a result, the flush toilet 1 can fragment the air in the jet water channel 20 by causing a change in the flow speed of the flush water in the contraction section 24. Also, the flush toilet 1 can fragment the air floating on the top surface 24a side of the contraction section 24 by increasing the change in the flow speed of the flush water on the top surface 24a side of the contraction section 24. Also, by making the angle between the side surface 24c of the contraction section 24 and the top surface 24a of the contraction section 24 an acute angle, the flush toilet 1 can fragment the air that has accumulated between the top surface 24a and the side surface 24c by flush water that has a slower flow speed near the top surface 24a. As a result, the flush toilet 1 can suppress pressure changes in the jet water channel 20 and suppress the generation of abnormal noise.

[0049] The jet water channel 20 has a curved portion 23. The curved portion 23 is connected to a contracting portion 24, and changes the flow direction of the wash water from rear to front to front to rear.

[0050] As a result, the flush toilet 1 is able to fragment the air at the contraction section 24, which is provided downstream of the curved section 23 in the flow direction of the flush water flowing through the jet water conduit 20. As a result, the flush toilet 1 is able to spray flush water containing fragmented air from the jet outlet 21. The flush toilet 1 is therefore able to suppress the generation of abnormal noises caused by flush water sprayed from the jet outlet 21.

[0051] The distance between the top surface 24a of the contraction portion 24 and the bottom surface 24b of the contraction portion 24 gradually becomes shorter toward the jet water outlet 21 side.

[0052] As a result, the flush toilet 1 can spout flush water that is less biased in the vertical direction from the jet outlet 21, while suppressing the generation of abnormal noises in the jet water conduit 20. As a result, the flush toilet 1 can suppress a decrease in the dischargeability of waste caused by the flush water spouted from the jet outlet 21, while suppressing the generation of abnormal noises.

[0053] The distance between the side surfaces 24c of the contraction portion 24 gradually becomes shorter toward the jet water outlet 21 side.

[0054] As a result, the flush toilet 1 can spout flush water that is less biased in the left-right direction from the jet outlet 21, while suppressing the generation of abnormal noises in the jet water conduit 20. As a result, the flush toilet 1 can suppress a decrease in the dischargeability of waste caused by the flush water spouted from the jet outlet 21, while suppressing the generation of abnormal noises.

[0055] In a flush toilet 1 according to a modified example, the cross-sectional area of ​​the curved section 23 may decrease as it approaches the jet outlet 21. In a flush toilet 1 according to a modified example, the cross-sectional area of ​​the jet water conduit 20 upstream of the curved section 23 may decrease as it approaches the jet outlet 21. In other words, the constricted section 24 may include the curved section 23, and the jet water conduit 20 upstream of the curved section 23.

[0056] As a result, the flush toilet 1 pertaining to the modified example is able to subdivide the air inside the jet water channel 20. As a result, the flush toilet 1 pertaining to the modified example is able to suppress pressure changes in the jet water channel 20, and suppress the generation of abnormal noise.

[0057] In a flush toilet 1 according to a modified example, the angle between at least one of the sides of the curved section 23 and the top surface of the curved section 23 may be an acute angle. Also, in a flush toilet 1 according to a modified example, the angle between at least one of the sides of the jet water channel 20 upstream of the curved section 23 and the top surface of the jet water channel 20 may be an acute angle. Also, in a flush toilet 1 according to a modified example, the angle between the side 24c of the contraction section 24 and the top surface 24a of the contraction section 24 does not have to be an acute angle. For example, the side 24c of the contraction section 24 and the top surface 24a of the contraction section 24 may be perpendicular. In other words, it is sufficient that the angle between at least one of the sides of the jet water channel 20 and the top surface of the jet water channel 20 is an acute angle.

[0058] As a result, the flush toilet 1 pertaining to the modified example is able to subdivide the air that has accumulated between the top surface of the jet water channel 20 and the side surface of the jet water channel 20. As a result, the flush toilet 1 pertaining to the modified example is able to suppress pressure changes in the jet water channel 20, and suppress the generation of abnormal noise.

[0059] In a flush toilet 1 pertaining to a variation, the top surface 24a of the contracted section 24 may protrude downward. For example, the top surface 24a of the contracted section 24 is formed so that the centre of the top surface 24a in the left-right direction protrudes downward. In this case, the width of the top surface 24a is the length of the top surface 24a in the left-right direction, including the protruding part.

[0060] Further advantages and modifications may readily occur to those skilled in the art. Thus, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and equivalents thereof. [Explanation of symbols]

[0061] 1 flush toilet 2 Toilet bowl body 3 Bowl section 6 Z outlet 7 Drain trap (trap part) 20 Zed Waterway 21 Z outlet 23 Curved section 24 Contraction section 24a Top 24b Bottom 24c side

Claims

1. A bowl part for receiving dirt, a trap part that communicates with the lower end of the bowl part so as to discharge the dirt in the bowl part and includes a riser pipe, and a jet water discharge part that jets washing water from the front of the trap part toward the riser pipe of the trap part are provided, wherein the jet water discharge part has a jet water guide path formed on both left and right sides so that the washing water flows, and at least a part of which is provided above the water storage surface, and a jet water discharge port formed at the tip of the jet water guide path for jetting the washing water toward the trap part and has, the jet water discharge port is formed such that the width of the top surface is larger than the width of the bottom surface, and the jet water discharge port is provided in front of the rear end of the opening that serves as the inlet of the trap part when viewed from above. A flush toilet.

2. The angle between at least one side surface of the side surfaces of the jet water discharge port and the top surface of the jet water guide path is an acute angle. The flush toilet according to Claim 1.

3. The jet water guide path has a contraction part whose cross-sectional area becomes smaller as it approaches the jet water discharge port side. The flush toilet according to Claim 1.

4. The distance between the top surface of the contraction part and the bottom surface of the contraction part gradually becomes shorter as it approaches the jet water discharge port side. The flush toilet according to Claim 3.

5. The distance between the side surfaces of the contraction part gradually becomes shorter as it approaches the jet water discharge port side. The flush toilet according to Claim 3.

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