Flush water tank device and flush toilet device provided with same

Abstract

The present invention addresses the problem of providing a flush water tank device capable of sufficiently using the volume in a flush water tank and the head pressure of flush water in the flush water tank for toilet cleaning. The present invention is a flush water tank device (4) characterized by comprising: a flush water tank main body (12) provided with a first tank part (13) and a second tank part (15) for storing flush water; a rim spout switching mechanism (8) that switches between discharge and stop of discharge of the wash water in the first water tank part; and a discharge valve (10) for spraying and discharging water, which switches the discharge or stop of the discharge of the wash water in the second tank section, the first tank section and the second tank section being configured such that the cross-sectional area varies depending on the height, and the discharge valve (10) being configured so as to discharge the wash water in the second tank section. A ratio of cross-sectional areas of the first tank portion and the second tank portion at a first height is different from a ratio of cross-sectional areas of the first tank portion and the second tank portion at a second height lower than the first height.

Description

Technical Field

[0001] The present invention relates to a flush water tank device, and more particularly to a flush water tank device installed on a flush toilet body for use in supplying flush water, and a flush toilet device equipped with the flush water tank device. Background Art

[0002] Chinese Patent Application Publication No. CN103967088 (Patent Document 1) describes a toilet water tank device. This toilet water tank device comprises a partition formed by a vertical wall within the water tank, which forms a first water tank and a second water tank. These first and second water tanks are each equipped with a first drain valve and a second drain valve, respectively, and the flush water in the first and second water tanks is supplied to a flush toilet.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent document 1: Chinese patent application publication number CN103967088. Summary of the Invention

[0006] Problems to be solved by the invention

[0007] In the toilet tank device described in Patent Document 1, the first drain valve opens to discharge flush water due to the hydraulic head pressure of the flush water in the first tank, and the second drain valve opens to discharge flush water due to the hydraulic head pressure of the flush water in the second tank. However, in the toilet tank device described in Patent Document 1, since the tank is simply divided into the first tank and the second tank, there is a problem in that the tank capacity and the hydraulic head pressure of the flush water in the tank cannot be fully utilized for toilet flushing.

[0008] Therefore, an object of the present invention is to provide a flush water tank device capable of fully utilizing the volume in a flush water tank and the head pressure of the flush water in the flush water tank for toilet flushing, and a flush toilet device equipped with the flush water tank device.

[0009] Means used to solve problems

[0010] In order to solve the above-mentioned problems, the present invention is a flush water tank device installed on a flush toilet body for use to supply flush water, characterized in that it comprises: a flush water tank body, which has a first water tank portion and a second water tank portion for accumulating flush water supplied to the flush toilet body; a rim water spouting switching mechanism, which switches the discharge or stop of the flush water in the first water tank portion in a manner that the flush water in the first water tank portion is spouted from the rim water spouting port of the flush toilet body; and a jet water spouting drain valve, which switches the discharge or stop of the flush water in the second water tank portion in a manner that the flush water in the second water tank portion is spouted from the jet water spouting port of the flush toilet body, the first water tank portion and the second water tank portion being configured so that the cross-sectional area is different according to the height, and the ratio of the cross-sectional area of ​​the first water tank portion to the second water tank portion at a first height is different from the ratio of the cross-sectional area of ​​the first water tank portion to the second water tank portion at a second height lower than the first height.

[0011] As described above, in the present invention, the first tank portion and the second tank portion are configured such that their cross-sectional areas vary depending on their height, and the ratio of the cross-sectional areas of the first tank portion to the second tank portion at a first height is different from the ratio of the cross-sectional areas of the first tank portion to the second tank portion at a second height lower than the first height. According to the present invention configured in this manner, for example, if the cross-sectional area of ​​the second tank portion is configured such that it is large at the first height and becomes smaller at the second height, a large amount of flushing water can be ejected from the jet spouting port at the beginning of flushing due to high head pressure. That is, according to the present invention, the flushing water within the flushing water tank body can be distributed to the inner rim spouting port and the jet spouting port of the water-washing toilet body in accordance with the required flushing water volume and water pressure. Thus, the volume within the flushing water tank body and the head pressure of the flushing water within the flushing water tank body can be fully utilized for toilet flushing.

[0012] In the present invention, it is preferable that the second tank portion is configured to have a cross-sectional area greater than or equal to a cross-sectional area of ​​the first tank portion at the first height.

[0013] According to the present invention constructed in this way, since the second water tank portion is constructed to have a cross-sectional area greater than or equal to the cross-sectional area of ​​the first water tank portion at the first height, at the beginning of cleaning when the water level in the second water tank portion is high, the instantaneous flow rate of the cleaning water ejected from the jet water outlet of the water-washing toilet body can be increased, thereby improving the cleaning effect.

[0014] In the present invention, preferably, the second water tank portion is configured to have a step portion, which is arranged at a height between the first height and the second height, the second water tank portion is configured to have a cross-sectional area that is reduced on the lower side of the step portion, and the first water tank portion is configured to have a cross-sectional area that is expanded on the lower side of the step portion.

[0015] According to the present invention thus constructed, the cross-sectional area of ​​the second tank portion decreases below the step, while the cross-sectional area of ​​the first tank portion increases below the step. As a result, the instantaneous flow rate from the jet water outlet is increased at the start of washing, and sufficient volume is ensured in the first tank portion below the level of the step, allowing a sufficient amount of washing water to be distributed to the inner rim outlet.

[0016] In the present invention, preferably, an inner tank is disposed in the flush water tank body, the second tank portion is formed inside the inner tank, and the first tank portion is formed inside the flush water tank body and outside the inner tank.

[0017] According to the present invention constructed in this way, since the internal water tank is arranged in the flush water tank body, the second water tank portion is formed on the inner side of the internal water tank, and the first water tank portion is formed on the inner side of the flush water tank body and on the outer side of the internal water tank. Therefore, the cross-sectional areas of the first water tank portion and the second water tank portion at various heights can be freely set, and the flush water volume and water head pressure can also be freely set according to requirements.

[0018] In the present invention, preferably, the jet water discharge valve is configured to discharge the flushing water in the second tank portion to lower the water level in the second tank portion from a predetermined initial water level to a predetermined jet water stop level, and the step portion is provided at a position lower than the jet water stop level.

[0019] According to the present invention thus constructed, since the height of the step portion that reduces the cross-sectional area of ​​the second tank portion is configured to be lower than the jet water stop level, the flow rate of the washing water ejected from the jet water spout can be maintained sufficiently high until the ejection is completed.

[0020] In the present invention, preferably, the switching mechanism for inner rim water discharge is constructed to discharge the cleaning water in the first water tank part to reduce the water level in the first water tank part from the specified initial water level to the specified inner rim water stop level, and the step portion is arranged at a position higher than the inner rim water stop level.

[0021] According to the present invention constructed in this manner, since the step portion that enlarges the cross-sectional area of ​​the first water tank portion is arranged at a position higher than the inner edge water stop water level, the cleaning water accumulated at the lower side of the step portion of the first water tank portion can be discharged from the inner edge water outlet, and the amount of cleaning water discharged from the inner edge water outlet can be fully ensured.

[0022] In the present invention, it is preferable that the first tank portion and the second tank portion be configured such that a ratio of a cross-sectional area at the first height to that at the second height is reversed.

[0023] According to the present invention constructed in this manner, since the first water tank portion and the second water tank portion are constructed so that the ratio of the cross-sectional areas at the first height and the second height is reversed, the instantaneous flow rate of the cleaning water ejected from either the jet water outlet or the inner edge water outlet can be increased, and the amount of cleaning water ejected from the other can be sufficiently ensured.

[0024] In addition, the present invention is a flush toilet device that performs cleaning by using flush water accumulated in a flush water tank, and is characterized in that it comprises: a flush toilet main body, which is provided with a bowl, an inner rim water spouting port, and a jet water spouting port; and the flush water tank device of the present invention, which supplies flush water to the inner rim water spouting port and the jet water spouting port of the flush toilet main body.

[0025] Effects of the Invention

[0026] According to the flush water tank device and the flush toilet device equipped with the flush water tank device of the present invention, the volume in the flush water tank and the head pressure of the flush water in the flush water tank can be fully used for flushing the toilet. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a block diagram showing the overall structure of a flush toilet apparatus according to an embodiment of the present invention;

[0028] Figure 2 This is a plan view showing a schematic structure of a flush toilet apparatus according to an embodiment of the present invention;

[0029] Figure 3 This is a front sectional view showing a schematic structure of a flush water tank device included in a flush toilet device according to an embodiment of the present invention;

[0030] Figure 4 is a cross-sectional view showing the structure of a float valve built into the flush water tank device according to an embodiment of the present invention;

[0031] Figure 5 is a cross-sectional view showing the structure of a hydraulic drive mechanism built into the flush water tank device according to an embodiment of the present invention;

[0032] Figure 6 The flush water tank device of the embodiment of the present invention is Figure 3 A horizontal cross-sectional view at a height H1;

[0033] Figure 7 The flush water tank device of the embodiment of the present invention is Figure 3 A horizontal cross-sectional view at a height H2;

[0034] Figure 8This is a timing chart showing the operation of the flush toilet apparatus according to the embodiment of the present invention. DETAILED DESCRIPTION

[0035] Next, a flush water tank assembly according to an embodiment of the present invention and a flush toilet assembly including the flush water tank assembly will be described with reference to the drawings.

[0036] Figure 1 It is a block diagram showing the overall structure of a flush toilet apparatus according to an embodiment of the present invention.

[0037] Figure 2 It is a plan view showing a schematic structure of a flush toilet apparatus according to an embodiment of the present invention. Figure 3 It is a front cross-sectional view showing a schematic structure of a flush water tank assembly included in the flush toilet apparatus according to the embodiment of the present invention. Figure 4 This is a cross-sectional view showing the structure of a float valve built into the flush water tank assembly according to the embodiment of the present invention. Figure 5 This is a cross-sectional view showing the structure of a hydraulic drive mechanism built into the flush water tank assembly according to the embodiment of the present invention. Figure 6 yes Figure 3 A horizontal cross-sectional view of the flush water tank device at a height H1. Figure 7 yes Figure 3 A horizontal cross-sectional view of the flush water tank device at a height H2.

[0038] like Figure 1 and Figure 2 As shown, a flush toilet apparatus 1 according to an embodiment of the present invention includes a flush toilet body 2 and a flush water tank assembly 4 disposed at the rear of the flush toilet body 2. The flush toilet apparatus 1 of this embodiment is configured so that after use, flushing is performed by operating a lever-type flush handle 4a provided on the flush water tank assembly 4.

[0039] The flush toilet body 2 includes a bowl 2a and a drain elbow conduit 2b extending from the lower portion of the bowl 2a. Furthermore, a rim spout 2c is provided at the upper edge of the bowl 2a, and a jet spout 2d is provided at the lower portion. When flushing the toilet, flush water is discharged from the rim spout 2c and jet spout 2d at predetermined times, thereby cleaning the waste-receiving surface of the bowl 2a. The waste and flush water within the bowl 2a are then discharged into the drain elbow conduit 2b. The waste and flush water discharged into the drain elbow conduit 2b are then discharged into a sewage pipe (not shown) through a drainage connection (not shown).

[0040] Wash water is supplied from a water supply source 6 such as a tap water pipe to the wash water tank assembly 4, and the supplied wash water is accumulated in the wash water tank assembly 4. Furthermore, a rim water spouting drain valve 8 and a jet water spouting drain valve 10, which serve as a switching mechanism for rim water spouting, are built into the wash water tank assembly 4 and are configured to open or close a drain port provided at the bottom of the wash water tank assembly 4, respectively.

[0041] In this embodiment, by opening the rim water spouting drain valve 8, flush water flows through the rim water conduit 2e formed inside the flush toilet body 2 and is discharged from the rim water spouting port 2c. Furthermore, by opening the jet water spouting drain valve 10, flush water flows through the jet water conduit 2f formed inside the flush toilet body 2 and is discharged from the jet water spouting port 2d.

[0042] Next, refer to Figure 2 and Figure 3 , the internal structure of the flush water tank device 4 is described.

[0043] like Figure 2 and Figure 3 As shown, the flush water tank device 4 includes: a flush water tank body 12; an internal water tank 14, which is arranged inside the flush water tank body; a drain valve 8 for inner edge water spouting, which is arranged in the flush water tank body 12; a drain valve 10 for jet water spouting, which is arranged in the internal water tank 14; a float valve 16, which is a water supply valve; and a water pressure drive mechanism 18.

[0044] The flush water tank body 12 and the internal tank 14 are containers configured to store flush water to be supplied to the flush toilet body 2. In this embodiment, the flush water tank body 12 is made of ceramic, and the internal tank 14, located within the flush water tank body 12, is made of resin. Furthermore, in this embodiment, the space within the flush water tank body 12 and outside the internal tank 14 constitutes the first tank portion 13, and the space within the internal tank 14 constitutes the second tank portion 15. Therefore, in this embodiment, the flush water tank body 12 includes the first tank portion 13 and the second tank portion 15 for storing flush water to be supplied to the flush toilet body 2.

[0045] In addition, if Figure 3As shown, the bottom surface of the flush water tank body 12 is provided with a first drain port 12a and a second drain port 12b. In this embodiment, these drain ports are circular. Flush water accumulated in the first tank portion 13 (inside the flush water tank body 12 and outside the internal tank 14) flows through the first drain port 12a into the inner rim conduit 2e of the flush toilet body 2 and is discharged through the inner rim spout 2c. Furthermore, flush water accumulated in the second tank portion 15 (inside the internal tank 14) flows through the second drain port 12b into the jet conduit 2f of the flush toilet body 2 and is discharged through the jet spout 2d.

[0046] The internal water tank 14 is arranged on the bottom surface of the flush water tank body 12, and the lower part of the internal water tank 14 is immersed in the flush water accumulated in the flush water tank body 12. In addition, a circular drain outlet 14a is formed on the bottom surface of the internal water tank 14. The drain outlet 14a of the internal water tank 14 is arranged in a concentric circle in a manner integrated with the second drain outlet 12b provided in the flush water tank body 12. That is, in this embodiment, the center of the circular second drain outlet 12b is aligned with the center of the circular drain outlet 14a in a top view. Therefore, the flush water in the internal water tank 14 flows into the jet water conduit 2f of the flush toilet body 2 through the drain outlet 14a of the internal water tank 14 and the second drain outlet 12b of the flush water tank body 12.

[0047] Furthermore, if Figure 3 As shown, in this embodiment, the drain port 14a of the internal water tank 14 is formed by a drain port-forming member 14b, which is separate from the main body of the internal water tank 14. This drain port-forming member 14b is a cylindrical member that is watertightly attached to the bottom surface of the internal water tank 14 and forms the drain port 14a on its inner side. Furthermore, a seating surface is provided at the top end of the drain port-forming member 14b, upon which the jet water spouting drain valve 10 seats, thereby closing the drain port 14a. Therefore, in this embodiment, the seating surface on which the jet water spouting drain valve 10 seats is formed by a separate component from the internal water tank 14.

[0048] In addition, if Figure 2 As shown, the flush water tank body 12 of the flush water tank device 4 is configured such that, in a top view, the width direction ( Figure 2 The arrow W direction is long, and the depth direction ( Figure 2 Furthermore, the inner tank 14 disposed within the flush water tank body 12 is also configured to be long in the width direction and short in the depth direction when viewed from above, and is formed into a special shape to avoid the inner edge drain valve 8 and the float valve 16.

[0049] Specifically, in this embodiment, the front and left end portion ( Figure 2 The lower left corner of the figure) is provided with a float valve 16, and the front and right end ( Figure 2 The inner rim drain valve 8 is located in the lower right corner of the flush water tank body 12. The inner tank 14 has cutouts 14c and 14d at the front ends of its width in a plan view, respectively, to avoid the presence of the float valve 16 and the inner rim drain valve 8. Specifically, the inner tank 14 has a U-shaped cutout 14c located in the area within the flush water tank body 12 where the inner rim drain valve 8 is located, and a cutout 14d located in the area where the float valve 16 is located to prevent interference with the inner tank 14.

[0050] On the other hand, Figure 3 As shown, the inner water tank 14 has steps 14e formed on both sides in the width direction, and the width becomes narrower below the steps 14e. That is, the inner water tank 14 is formed into a substantially T-shape in the front view, and its horizontal cross-sectional area A2 ( Figure 6 、 Figure 7 ) are fixed above and below the stepped portion 14e, respectively. In other words, the second water tank portion 15, which serves as the interior space of the inner water tank 14, and the first water tank portion 13, which serves as the exterior space, are configured so that their horizontal cross-sectional areas vary depending on their height. Specifically, the second water tank portion 15 is configured so that its horizontal cross-sectional area A2 decreases below the stepped portion 14e. On the other hand, the first water tank portion 13 is configured so that its horizontal cross-sectional area A1 increases below the stepped portion 14e.

[0051] As a result, in this embodiment, the ratio of the horizontal cross-sectional area of ​​the first tank portion 13 to that of the second tank portion 15 at the first height H1 above the step portion 14e is ( Figure 6 A1 / A2) is different from the ratio of the horizontal cross-sectional area of ​​the first water tank portion 13 and the second water tank portion 15 at the second height H2 below the first height H1 and the step portion 14e ( Figure 7 In this embodiment, as Figure 6 As shown, at a first height H1 above the step portion 14e, the horizontal cross-sectional area A2 of the second tank portion 15 is configured to be larger than the horizontal cross-sectional area A1 of the first tank portion 13. Figure 7 As shown, at a second height H2 below the step portion 14e, the horizontal cross-sectional area A1 of the first tank portion 13 is larger than the horizontal cross-sectional area A2 of the second tank portion 15. Therefore, in this embodiment, the ratio of the horizontal cross-sectional areas of the first tank portion 13 to the second tank portion 15 is reversed at the first height H1 and the second height H2.

[0052] Furthermore, when the flush water tank assembly 4 is actually in use, flush water accumulates in the second tank section 15 above the stepped portion 14e of the inner tank 14. Therefore, in this embodiment, the inner tank 14 is submerged in the flush water accumulated in the first tank section 13 above the stepped portion 14e. Furthermore, in this embodiment, by making the upper portion of the second tank section 15 larger, the second tank section 15 accumulates a large amount of flush water with high potential energy. This increases the head pressure of the flush water discharged from the second tank section 15 and increases the instantaneous flow rate of the flush water discharged from the jet spout 2d.

[0053] Furthermore, by forming the inner tank 14 into a special shape using resin, the depth dimension of the flush water tank assembly 4 is reduced while ensuring a sufficient volume for the inner tank 14. Furthermore, since the inner tank 14 made of resin can have thinner walls than when formed of ceramic, the volume within the flush water tank body 12 can be effectively utilized.

[0054] Next, the rim water spouting drain valve 8, which serves as a rim water spouting switching mechanism, is a valve body configured to open or close the first drain port 12a provided in the flush water tank body 12. By pulling the rim water spouting drain valve 8 upward, the first drain port 12a is opened. As a result, the flush water in the first tank portion 13 is discharged to the rim water conduit 2e ( Figure 1 ) and spouts from the rim spout port 2c. Therefore, the rim spouting drain valve 8, which serves as a rim spouting switching mechanism, switches the flush water accumulated in the first tank portion 13 to be discharged to the flush toilet body 2 or stops the discharge.

[0055] It should be noted that, in this embodiment, the user rotates the lever-type flush handle 4a provided on the flush water tank device 4, thereby pulling the ball chain 8a ( Figure 3 ), and then the inner rim water spouting drain valve 8 is pulled up. It should be noted that, as a modified example, the present invention can also be configured in such a manner that the inner rim water spouting drain valve 8 is pulled up based on a control signal from a remote control device (not shown) or a detection signal from a human body sensor (not shown), thereby performing cleaning.

[0056] In this embodiment, a rim water spouting drain valve 8 is provided as the rim water spouting switching mechanism. However, any structure other than the rim water spouting drain valve 8 can be used as the rim water spouting switching mechanism. For example, a jet pump (not shown) can be used as the rim water spouting switching mechanism. This jet pump directs flush water stored in the first tank portion 13 into the flush toilet body. In this case, a jet pump nozzle (not shown) is located in the first tank portion 13, and this nozzle ejects a portion of the flush water supplied via a water supply valve such as the float valve 16. By ejecting flush water from the nozzle within the first tank portion 13, flush water stored in the first tank portion 13 is drawn in, and the jet pump then causes the flush water to flow into the flush toilet body. In addition to this jet pump (not shown), any structure that switches the flow of flush water to the flush toilet body 2 between on and off can be used as the rim water spouting switching mechanism.

[0057] Next, the jet water discharge valve 10 is a valve body configured to open or close the discharge port 14a provided in the internal water tank 14. By pulling the jet water discharge valve 10 upward, the jet water discharge valve 10 is separated from the seat surface of the discharge port 14a, and the discharge port 14a is opened. As a result, the flush water in the second water tank portion 15 is discharged from the discharge port 14a and flows into the jet water conduit 2f ( Figure 1 ), and then spouted from the jet water spouting port 2d. Therefore, the jet water spouting drain valve 10 switches the flush water accumulated in the second tank portion 15 to be discharged to the flush toilet body 2 or stops the discharge.

[0058] Furthermore, in this embodiment, the jet water spouting drain valve 10 is configured to be pulled up from the discharge port 14a by a hydraulic drive mechanism 18. Specifically, the jet water spouting drain valve 10 comprises a valve body having an upwardly extending valve shaft 10a, and the hydraulic drive mechanism 18 pulls up the valve shaft 10a. Furthermore, when the jet water spouting drain valve 10 is pulled up to a predetermined height, it is disconnected from the hydraulic drive mechanism 18 and slowly lowered, closing the discharge port 14a. While the structure of the hydraulic drive mechanism 18 will be described later, the present invention is also applicable to flush water tank devices that do not include the hydraulic drive mechanism 18.

[0059] Furthermore, the float valve 16 as a water supply valve is configured to allow washing water supplied from the water supply source 6 to flow in through the inflow pipe 16 a and to switch supply or stop supply of washing water to be stored in the first tank portion 13 and the second tank portion 15 .

[0060] Next, refer to Figure 4 , the structure of the float valve 16 will be described.

[0061] like Figure 4 As shown, the float valve 16 includes a main body 20 connected to the inlet pipe 16a and the outlet pipe 16b; a main valve element 20a disposed within the main body 20; a valve seat 20b on which the main valve element 20a is seated; an arm 24 rotated by a float 22; and a pilot valve 26 moved by the rotation of the arm 24. Specifically, the float valve 16 is configured to include a float 22 that operates in conjunction with the water level within the flush water tank assembly 4. When the float 22 descends to a predetermined position, flush water is supplied to the hydraulic drive mechanism 18.

[0062] The main body 20 is a component with a connection to the inlet pipe 16a at its lower portion and a connection to the outlet pipe 16b on one side. A valve seat 20b is formed inside the main body 20, communicating with the outlet pipe 16b connected to the connection. Furthermore, a main valve body 20a is located inside the main body 20 to open and close the valve seat 20b. When opened, tap water flowing into the inlet pipe 16a passes through the valve seat 20b and flows out of the outlet pipe 16b. The outlet pipe 16b is connected to the hydraulic drive mechanism 18.

[0063] The main valve body 20a is a diaphragm valve body in a generally circular plate shape, and is mounted in the main body 20 so as to be seated and unseated relative to the valve seat 20b. In addition, a drain hole 20c is provided on the peripheral edge of the main valve body 20a. Furthermore, in the main body 20, a drain hole 20c is provided on the opposite side of the valve seat 20b relative to the main valve body 20a. Figure 4 A pressure chamber 20d is formed (left side in the center). Specifically, the pressure chamber 20d is defined by the inner wall surface of the main body 20 and the main valve body 20a. When the pressure in the pressure chamber 20d increases, the main valve body 20a is pressed toward the valve seat 20b by the pressure, and is seated on the valve seat 20b.

[0064] Furthermore, the pressure passage 20e extends upward so as to communicate with the pressure chamber 20d provided in the main body 20, and a pilot valve port 26a is provided at the upper end of the pressure passage 20e. The pilot valve port 26a is open upward and is opened or closed by the pilot valve 26.

[0065] On the other hand, the float 22 is supported by an arm 24, which is rotatably supported by a support shaft 24a. Furthermore, the pilot valve 26 is connected to the arm 24, and the pilot valve 26 moves in the vertical direction as the arm 24 rotates. In this embodiment, the float 22 is arranged in the flush water tank body 12 and moves up and down according to the water level in the flush water tank body 12. Thus, when the water level in the flush water tank body 12 rises to above a predetermined water level, the float 22 is pushed upward, and the pilot valve 26 moves downward and seats on the pilot valve port 26a, closing it. On the other hand, if the flush water in the flush water tank body 12 is drained, thereby lowering the water level, the float 22 moves downward, causing the pilot valve 26 to move upward, and the pilot valve port 26a to open. Therefore, when the water level in the flush water tank body 12 is higher than the predetermined water level and the toilet is on standby for flushing, the pilot valve port 26a of the main body 20 is in a closed state.

[0066] Furthermore, the tap water flowing into the main body 20 from the inlet pipe 16a flows into the annular space around the valve seat 20b, and from there flows into the pressure chamber 20d through the drain hole 20c of the main valve body 20a. However, when the pilot valve port 26a is closed by the pilot valve 26, the tap water flowing into the pressure chamber 20d from the drain hole 20c has no way to flow out, and the pressure in the pressure chamber 20d rises. In this way, when the pressure in the pressure chamber 20d rises, the main valve body 20a is pushed toward the valve seat 20b (towards the valve seat 20b) by the pressure. Figure 4 The valve seat 20b is pressed by the main valve body 20a.

[0067] On the other hand, when the inner rim water discharge valve 8 is opened by the washing operation, if the water level in the first tank portion 13 falls below the predetermined level, the float 22 drops, the pilot valve 26 moves upward, and the pilot valve port 26a opens. When the pilot valve port 26a opens, the water in the pressure chamber 20d flows out from the pilot valve port 26a, and the pressure in the pressure chamber 20d decreases. As a result, the main valve body 20a moves away from the valve seat 20b (towards the valve seat 20b). Figure 4 Like this, when the pilot valve port 26a is open, the pressure in the pressure chamber 20d does not rise, and therefore, the valve seat 20b becomes the open state.

[0068] Next, refer to Figure 5 , the structure of the water pressure drive mechanism 18 is explained.

[0069] The hydraulic drive mechanism 18 is configured to drive the jet water discharge valve 10 using the water pressure of the flush water supplied from the tap water pipe to the flush water tank assembly 4. Specifically, the hydraulic drive mechanism 18 comprises a cylinder 18a, into which water supplied from the float valve 16 flows; a piston 18b slidably disposed within the cylinder 18a; and a rod 28 protruding from the lower end of the cylinder 18a and used to drive the jet water discharge valve 10. Furthermore, a spring 18c is disposed within the cylinder 18a, biasing the piston 18b downward. A gasket is attached to the piston 18b to ensure watertightness between the inner wall of the cylinder 18a and the piston 18b. Furthermore, a clutch mechanism 30 is provided at the lower end of the rod 28, which connects and disconnects the rod 28 from the valve shaft 10a of the jet water discharge valve 10.

[0070] Cylinder 18a is a cylindrical component with its axis aligned vertically. It slidably accommodates piston 18b. Furthermore, an outflow tube 16b extending from float valve 16 is connected to the lower end of cylinder 18a. Wash water flowing from float valve 16 flows into cylinder 18a. Consequently, the water flowing into cylinder 18a pushes piston 18b upward against the force of spring 18c.

[0071] Meanwhile, an outflow hole is provided at the top end of cylinder 18a, and water supply pipe 32 is connected to this outflow hole. Therefore, when water flows into cylinder 18a from outflow pipe 16b connected to the bottom of cylinder 18a, piston 18b is pushed upward from the bottom of cylinder 18a. Furthermore, when piston 18b is pushed above the outflow hole, the water flowing into cylinder 18a flows out of the outflow hole into water supply pipe 32.

[0072] The water supply pipe 32 extends downward from an outflow hole provided at the upper end of the cylinder 18a. The wash water flowing out of the cylinder 18a flows into the second water tank portion 15 through a water supply port 32a at the lower end of the water supply pipe 32. The water supply port 32a at the lower end of the water supply pipe 32 is located below the surface of the wash water within the second water tank portion 15 during standby operation. Therefore, the float valve 16 is configured to allow the wash water to flow into the second water tank portion 15 from the water supply port 32a, which is located below the surface of the water in the second water tank portion 15.

[0073] The rod 28 is a rod-shaped member connected to the lower surface of the piston 18b. It extends downward from the cylinder 18a through a through-hole formed in the bottom surface of the cylinder 18a. The lower end of the rod 28 is connected to the valve shaft 10a of the jet water spouting drain valve 10 via a clutch mechanism 30. The rod 28 connects the piston 18b to the jet water spouting drain valve 10. Therefore, when water flows into the cylinder 18a and the piston 18b is pushed upward, the rod 28 connected to the piston 18b lifts the jet water spouting drain valve 10 upward, opening it.

[0074] Furthermore, a gap is provided between the rod 28 protruding from the bottom of the cylinder 18a and the inner wall of the through-hole of the cylinder 18a. Some of the water flowing into the cylinder 18a flows out through this gap. The water flowing out of this gap flows into the second water tank portion 15. It should be noted that because this gap is narrow and the flow resistance is high, even when water is flowing out of the gap, the pressure in the cylinder 18a rises due to the water flowing into the cylinder 18a from the outflow pipe 16b, causing the piston 18b to be pushed upward against the force of the spring 18c.

[0075] Furthermore, the clutch mechanism 30 detachably couples the rod 28 to the jet water spouting drain valve 10. When the jet water spouting drain valve 10 and the rod 28 are raised to a predetermined distance, the clutch mechanism 30 disconnects the valve shaft 10a of the jet water spouting drain valve 10 from the rod 28. When the clutch mechanism 30 is disconnected, the jet water spouting drain valve 10 is no longer linked to the movement of the piston 18b and the rod 28. As the water level in the second tank portion 15 decreases, the jet water spouting drain valve 10 descends, closing the drain port 14a of the internal tank 14.

[0076] Next, the first reference Figure 8 , the function of the flush toilet device 1 according to the embodiment of the present invention will be described.

[0077] Figure 8 This is a timing chart showing the operation of the flush toilet apparatus 1 according to the embodiment of the present invention, and shows, from top to bottom, the jet water spouting state, the rim water spouting state, and the float valve state.

[0078] First, in the standby state for toilet flushing, the first drain port 12a of the flush water tank body 12 and the drain port 14a of the internal water tank 14 are closed by the inner rim water spouting drain valve 8 and the jet water spouting drain valve 10, respectively. In addition, in the standby state, flush water is accumulated in the first water tank portion 13 and the second water tank portion 15 to a predetermined initial water level. In this embodiment, the initial water level of the first water tank portion 13 is set at a position higher than the step portion 14e of the internal water tank 14. In this way, when the first water tank portion 13 is at the initial water level, the main body 20 ( Figure 4 ) is in a closed state, and the valve seat 20b is closed by the main valve body 20a. On the other hand, in this embodiment, the initial water level of the second water tank portion 15 is located at a height substantially the same as the upper edge of the inner water tank 14, which is higher than the initial water level of the first water tank portion 13.

[0079] Next, in Figure 8 At time t1, if the user rotates the lever type flush handle 4a ( Figure 3 ), the ball chain 8a connected thereto pulls up the inner rim water discharge valve 8. As a result, the inner rim water discharge valve 8 is separated from the first drain port 12a, and the first drain port 12a is opened. When the first drain port 12a is opened, the washing water accumulated in the first tank portion 13 flows from the first drain port 12a into the inner rim water conduit 2e ( Figure 2 ) and spit out from the inner edge water spouting port 2c. By spouting water from the inner edge water spouting port 2c, a swirling flow is formed on the waste receiving surface of the bowl portion 2a, thereby cleaning the waste receiving surface.

[0080] The washing water is discharged from the first drain port 12a, and the water level in the first tank portion 13 is lowered. As a result, the float 22 of the float valve 16 is lowered, and the pilot valve 26 ( Figure 4 ) is opened. As a result, the pressure in the pressure chamber 20d decreases and the main valve body 20a opens, so that the washing water is supplied to the water pressure drive mechanism 18 through the outflow pipe 16b.

[0081] When washing water is supplied to the hydraulic drive mechanism 18, it flows into the cylinder 18a ( Figure 5 ) pushes piston 18b upward against the force of spring 18c. This pulls up the valve shaft 10a of jet water discharge valve 10, which opens outlet 14a of internal tank 14. Specifically, jet water discharge valve 10 is driven and opened by the pressure of tap water supplied via float valve 16.

[0082] Therefore, in Figure 8 At time t2, the outlet 14a is opened, and the washing water accumulated in the second tank portion 15 flows into the jet water conduit 2f ( Figure 2 ) and is ejected from the jet water spouting port 2d. The jet water spouting from the jet water spouting port 2d fills the drainage trap pipe 2b with water, thereby inducing a siphon effect.

[0083] The siphon effect causes the retained water and waste in the bowl 2a to be sucked into the drain trap pipe 2b and discharged to the sewage pipe (not shown).

[0084] When the drain port 14a is closed, the jet water conduit 2f is filled with wash water up to the level of the accumulated water in the bowl 2a, and no wash water is present above the accumulated water level. Therefore, before the jet water discharge valve 10 is opened, no wash water is present at the upstream end of the jet water conduit 2f.

[0085] When the jet water discharge valve 10 is opened, the space in the jet water conduit 2f where no water is present can be filled with water in a short time, and the water can be discharged from the jet water discharge port 2d as quickly as possible. In particular, in this embodiment, the cross-sectional area ( Figure 6 The cross-sectional area A2 in the middle is configured to be larger than the cross-sectional area ( Figure 7 The cross-sectional area A2 in the second tank portion 15 is large, so the second tank portion 15 has a large volume at a high position. Therefore, a large amount of washing water with high head pressure can flow into the jet water conduit 2f, thereby increasing the instantaneous flow rate of washing water ejected from the jet water spout 2d.

[0086] On the other hand, when the jet water discharge valve 10 is pulled up to a predetermined height together with the piston 18b of the hydraulic drive mechanism 18, the clutch mechanism 30 ( Figure 5 ), and the valve shaft 10a of the jet water discharge valve 10 is disconnected from the rod 28. As a result, the jet water discharge valve 10 descends toward the discharge port 14a as the water level in the second tank portion 15 decreases. Figure 8 At time t3, when the water level in the second water tank portion 15 drops to the specified injection water stop water level JWL ( Figure 3 ), the jet water spouting valve 10 is seated on the discharge port 14a, and the discharge port 14a is closed. As a result, the jet water spouting from the jet water spouting port 2d is stopped.

[0087] Furthermore, in this embodiment, the jet water stop level JWL is set above the stepped portion 14e of the internal tank 14. Therefore, the water discharged from the jet water spouting port 2d utilizes the wash water stored at a higher position within the second tank portion 15. Consequently, a high head pressure acts on the wash water discharged from the jet water spouting port 2d, enabling high-flow jet water spouting with a strong water momentum. Furthermore, because the horizontal cross-sectional area A2 above the stepped portion 14e of the internal tank 14 is larger, a large amount of wash water can be secured for jet water spouting.

[0088] It should be noted that, when the main valve body 20a of the float valve 16 is open, the washing water supplied from the water supply source 6 (tap water pipe) is supplied to the hydraulic drive mechanism 18 via the float valve 16 and is supplied to the hydraulic drive mechanism 18 via the water supply pipe 32 ( Figure 5) and flows into the second water tank portion 15. However, since the flow rate of the washing water flowing out of the discharge port 14a of the internal water tank 14 is greater than the flow rate of the washing water flowing into the second water tank portion 15 through the water supply port 32a of the water supply pipe 32 when the jet water discharge valve 10 is open, the water level in the second water tank portion 15 is lowered. Figure 8 At time t3 , after the jet water spouting stops (after the jet water spouting drain valve 10 is closed), the water level in the second tank portion 15 rises due to the flush water flowing in from the water supply pipe 32 .

[0089] On the other hand, since the rim water discharge valve 8 is still open, the washing water in the first tank portion 13 flows out from the first drain port 12a, and the water level in the first tank portion 13 continues to decrease. Figure 8 At time t4, when the water level in the washing water tank body 12 drops to the specified inner edge water stop level RWL ( Figure 3 ), the rim water spouting drain valve 8 is seated on the first drain port 12a, thereby closing the rim water spouting drain valve 8. Thus, the rim water spouting from the rim water spouting port 2c is stopped.

[0090] Furthermore, in this embodiment, the rim water stop level RWL is set below the step 14e of the inner tank 14. Therefore, wash water accumulated at a lower level within the first tank portion 13 is also used for water discharge from the rim water outlet 2c. Consequently, there is little head pressure acting on the wash water discharged from the rim water outlet 2c. However, since the rim water outlet 2c, which opens above the surface of the accumulated water in the bowl 2a, is exposed to the atmosphere, water discharge can be performed easily even when the head pressure of the wash water is low, effectively cleaning the bowl 2a. Furthermore, in this embodiment, since the rim water discharge utilizes the wash water accumulated in the first tank portion 13 from the initial water level above the step 14e to the rim water stop level RWL below the step 14e, a large amount of wash water can be ensured for rim water discharge.

[0091] Furthermore, since the main valve body 20a of the float valve 16 is also maintained in an open state after the inner rim water discharge drain valve 8 is closed, the cleaning water supplied from the water supply source 6 (tap water pipe) flows into the second water tank part 15 from the water supply port 32a of the water supply pipe 32 via the float valve 16 and the water pressure drive mechanism 18.

[0092] The water level in the second water tank portion 15 rises due to the inflow of the washing water. Figure 8 At time t5 , when the second tank portion 15 is filled with water, the wash water begins to overflow from the inner tank 14 and flows into the first tank portion 13 .

[0093] Then, the washing water flows into the first water tank portion 13, and the water level in the first water tank portion 13 begins to rise. Next, when the water level in the first water tank portion 13 rises to a predetermined initial water level, the float 22 of the float valve 16 rises, and the pilot valve 26 ( Figure 4 ) is closed. In this way, if the pilot valve 26 is closed, the washing water flowing into the pressure chamber 20d from the discharge hole 20c of the main valve body 20a provided in the float valve 16 cannot flow out, and the pressure in the pressure chamber 20d rises. Figure 8 At time t6, the main valve body 20a is pressed by the pressure in the pressure chamber 20d and seats on the valve seat 20b, thereby closing the main valve body 20a. As a result, the water supply from the water supply source 6 to the hydraulic drive mechanism 18 via the float valve 16 is stopped, and the supply of washing water to the second tank portion 15 is stopped.

[0094] If the water supply to the hydraulic drive mechanism 18 is stopped, the piston 18b ( Figure 5 ) is pushed down by the force of spring 18c. Rod 28 attached to piston 18b also lowers accordingly. When rod 28 reaches a predetermined position, it reconnects to valve shaft 10a of jet water discharge valve 10 via clutch mechanism 30. As described above, a single toilet flush is completed, and flush toilet apparatus 1 returns to its standby state for toilet flushing.

[0095] In the flush water tank device 4 of the embodiment of the present invention, the first tank portion 13 and the second tank portion 15 are configured so that the cross-sectional area A1 and the cross-sectional area A2 are different according to the height, and the ratio of the cross-sectional area of ​​the first tank portion 13 to the cross-sectional area of ​​the second tank portion 15 at the first height H1 is ( Figure 6 A1 / A2) is different from the ratio of the cross-sectional area of ​​the first water tank portion 13 to the second water tank portion 15 at a second height H2 lower than the first height H1 ( Figure 7 For example, as shown in the above-mentioned embodiment, when the cross-sectional area A2 of the second water tank portion 15 is configured to be large at the first height H1 and to be smaller at the second height H2, a large amount of flushing water can be ejected from the jet water spouting port 2d by high water head pressure at the beginning of flushing. That is, the flushing water in the flushing water tank body 12 can be distributed to the inner edge spouting port 2c and the jet water spouting port 2d of the flush toilet body 2 in accordance with the required flushing water volume and water potential. Thus, the volume in the flushing water tank body 12 and the water head pressure of the flushing water in the flushing water tank body 12 can be fully used for toilet flushing.

[0096] In addition, according to the flush water tank device 4 of this embodiment, since the second water tank portion 15 is constructed to have a cross-sectional area greater than or equal to the cross-sectional area A1 of the first water tank portion 13 at the first height H1, at the initial stage of flushing when the water level in the second water tank portion 15 is high, the instantaneous flow rate of the flush water ejected from the jet spout 2d of the water-flushing toilet body can be increased, thereby improving the flushing effect.

[0097] Furthermore, in the flush water tank assembly 4 of this embodiment, the second tank portion 15 is configured such that its cross-sectional area A2 decreases below the step 14e, while the first tank portion 13 is configured such that its cross-sectional area A1 increases below the step 14e. As a result, the instantaneous flow rate from the jet spout 2d is increased at the start of flushing, while ensuring sufficient volume in the first tank portion 13 below the level of the step 14e, allowing a sufficient amount of flush water to be distributed to the inner rim spout 2c.

[0098] In addition, according to the flush water tank device 4 of this embodiment, since the internal water tank 14 is arranged in the flush water tank body 12, the second water tank portion 15 is formed on the inner side of the internal water tank 14, and the first water tank portion 13 is formed on the inner side of the flush water tank body 12 and on the outer side of the internal water tank 14. Therefore, the cross-sectional areas of the first water tank portion 13 and the second water tank portion 15 at various heights can be freely set, and the flush water volume and water head pressure can also be freely set according to requirements.

[0099] Furthermore, according to the cleaning water tank device 4 of this embodiment, since the height of the step portion 14e that reduces the cross-sectional area A2 of the second water tank portion 15 is constructed to be lower than the jet water stop level JWL, the flow rate of the cleaning water ejected from the jet water spouting port 2d can be maintained sufficiently high until the water spouting is completed.

[0100] In addition, according to the cleaning water tank device 4 of this embodiment, since the step portion 14e that enlarges the cross-sectional area A1 of the first water tank portion 13 is arranged at a position higher than the inner edge water stop level RWL, the cleaning water accumulated on the lower side of the step portion 14e of the first water tank portion 13 can be discharged from the inner edge water outlet 2c, and the amount of cleaning water discharged from the inner edge water outlet 2c can be fully ensured.

[0101] Furthermore, according to the cleaning water tank device 4 of this embodiment, since the first water tank portion 13 and the second water tank portion 15 are constructed so that the ratio of the cross-sectional areas (A1 / A2) is reversed at the first height H1 and the second height H2, the instantaneous flow rate of the cleaning water ejected from the jet water outlet 2d can be increased, and the amount of cleaning water ejected from the inner edge water outlet 2c can be fully ensured.

[0102] While the flush water tank assembly and flush toilet assembly equipped with the flush water tank assembly according to an embodiment of the present invention have been described above, various modifications may be made to the above-described embodiment. In particular, in the above-described embodiment, the first and second tank sections are formed by disposing an internal tank within the flush water tank body. Alternatively, the first and second tank sections may be formed by providing a partition wall within the flush water tank body.

[0103] In addition, in the above-mentioned embodiment, the horizontal cross-sectional area of ​​the first water tank portion and the second water tank portion changes sharply due to the step portion provided in the internal water tank, but it is also possible to form a partition wall or internal water tank within the flush water tank body in a manner that allows the horizontal cross-sectional area of ​​the first water tank portion and the second water tank portion to change slowly according to the height.

[0104] In addition, in the above embodiment, a float valve is used as the water supply valve for switching the supply of flush water to be stored in the flush water tank body and the internal water tank, or stopping the supply. However, a water supply valve other than a float valve can also be used. Furthermore, in the above embodiment, the jet water discharge valve is driven by a hydraulic drive mechanism, but the hydraulic drive mechanism does not need to be provided.

[0105] Explanation of symbols:

[0106] 1. Water-flushing toilet device

[0107] 2. Water-washing toilet body

[0108] 2a Pelvis

[0109] 2b drainage elbow pipeline

[0110] 2c inner edge water outlet

[0111] 2D jet water outlet

[0112] 2e inner edge waterway

[0113] 2f jet water channel

[0114] 4. Clean water tank device

[0115] 4a Lever flush handle

[0116] 6 Water supply source

[0117] 8 Drain valve for inner rim water spouting (switching mechanism for inner rim water spouting)

[0118] 8a spherical chain

[0119] 10 Drain valve for jet water

[0120] 10a valve shaft

[0121] 12 Clean water tank body

[0122] 12a First drainage outlet

[0123] 12b Second drain outlet

[0124] 13 First water tank

[0125] 14 internal water tank

[0126] 14a Discharge outlet

[0127] 14b Drainage outlet forming component

[0128] 14c incision

[0129] 14d incision

[0130] 14e Step

[0131] 15 Second water tank

[0132] 16 Float valve (water supply valve)

[0133] 16a Inflow pipe

[0134] 16b outflow tube

[0135] 18. Hydraulic drive mechanism

[0136] 18a cylinder

[0137] 18b piston

[0138] 18c spring

[0139] 20 Main body

[0140] 20a main valve body

[0141] 20b valve seat

[0142] 20c drain hole

[0143] 20d pressure chamber

[0144] 20e pressure path

[0145] 22 buoys

[0146] 24 arms

[0147] 24a support shaft

[0148] 26 pilot valve

[0149] 26a pilot valve port

[0150] 28 strokes

[0151] 30 Clutch mechanism

[0152] 32 water supply pipe

[0153] 32a Water supply port.

Claims

1. A flush water tank device, which is installed on a flush toilet body to supply flush water, characterized in that: It has: a flush water tank body including a first tank portion and a second tank portion for storing flush water supplied to the flush toilet body; a rim water spouting switching mechanism for switching the discharge or stopping of the flush water in the first tank portion so that the flush water in the first tank portion is spouted from the rim water spouting port of the flush toilet body; and The jet water discharge valve switches the discharge of the flush water in the second tank portion to or stops the discharge in such a manner that the flush water in the second tank portion is discharged from the jet water discharge port of the flush toilet body. The first water tank portion and the second water tank portion are configured so that their cross-sectional areas vary depending on their heights, and a ratio of the cross-sectional areas of the first water tank portion to the second water tank portion at a first height is different from a ratio of the cross-sectional areas of the first water tank portion to the second water tank portion at a second height lower than the first height.

2. The flush water tank device according to claim 1, wherein: The second tank portion is configured to have a cross-sectional area greater than or equal to a cross-sectional area of ​​the first tank portion at the first height.

3. The flush water tank device according to claim 2, wherein: The second water tank portion is provided with a step portion which is provided at a height between the first height and the second height. The second water tank portion is configured such that the cross-sectional area is reduced on the lower side of the step portion, and the first water tank portion is configured such that the cross-sectional area is expanded on the lower side of the step portion.

4. The flush water tank device according to claim 2, wherein: An inner tank is disposed in the flush water tank body. The second tank portion is formed inside the inner tank. The first tank portion is formed inside the flush water tank body and outside the inner tank.

5. The flush water tank device according to claim 3, wherein: The jet water discharge valve is configured to discharge the flush water in the second tank portion to lower the water level in the second tank portion from a predetermined initial water level to a predetermined jet water stop level, and the step portion is provided at a position lower than the jet water stop level.

6. The flush water tank device according to claim 3, wherein: The rim water discharge switching mechanism is configured to discharge the flushing water in the first water tank portion to lower the water level in the first water tank portion from a specified initial water level to a specified rim water stop level, and the step portion is arranged at a position higher than the rim water stop level.

7. The flush water tank device according to any one of claims 1 to 6, wherein: The first tank portion and the second tank portion are configured such that a ratio of cross-sectional areas is reversed at the first height and the second height.

8. A flush toilet device that performs flushing using flush water stored in a flush water tank, characterized in that: It has: A flush toilet body, which is provided with a bowl, an inner edge water spout, and a jet water spout; and The flush water tank device according to any one of claims 1 to 6 supplies flush water to the rim water spouting port and the jet water spouting port of the flush toilet body.

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