Washing toilet device

Abstract

The present invention addresses the problem of providing a flush toilet device capable of saving water while ensuring sufficient washing performance by effectively using washing water stored in a washing water tank. The present invention is a flush toilet device (1) characterized by being provided with: a flush toilet main body (2) provided with a bowl part (2a), a rim spout (2c), a drain elbow line (2b), and a jet spout (2d); a wash water tank main body (4); a rim spouting / water stopping switching mechanism (8) for spouting or stopping spouting of the wash water from the rim spouting port; a flush toilet device (1) that performs a flush sequence including: a first step (S1) in which spouting of rim water is started, and a second step (S2) in which spouting of rim water is stopped from spouting of the rim water through the spouting port (3), and a second step (S4) in which spouting of rim water is stopped from spouting of the rim water through the spouting port (3); a second step (S2) in which, in a state in which the inner edge discharge is continued, spray discharge is started and a siphoning action is started in the drain bend line; and a third step (S3) in which the water spouting is stopped and the water spouting is continued.

Description

Technical Field

[0001] The present invention relates to a water-flushing toilet device, and in particular to a water-flushing toilet device that performs flushing by flushing water accumulated in a flushing water tank. Background Art

[0002] Japanese Patent Application Publication No. 2015-168994 (Patent Document 1) describes a flush toilet. In this flush toilet, the bowl is cleaned by opening a drain valve on a water storage tank assembly, allowing flush water to be discharged from two rim spouts and a jet spout provided on the flush toilet. Furthermore, in this flush toilet, flush water discharged from the water storage tank assembly first flows into a single water conduit, which then branches, and the flush water is then discharged from the two rim spouts and the jet spout.

[0003] Furthermore, in conventional tank-type flush toilets, the flush water tank is equipped with a single drain valve, which diverts flush water discharged from the flush water tank to the inner rim outlet and the jet outlet, whereupon water is discharged from each outlet. Specifically, the water conduit formed within the flush toilet body branches midway, directing flush water to the inner rim outlet and the jet outlet, respectively.

[0004] International Publication No. 2005 / 085538 (Patent Document 2) describes a flush toilet. This flush toilet is a tank-type flush toilet, comprising a tank for storing flush water for rim spouting and a tank for storing flush water for jet spouting. Each flush water tank is provided with a drain valve for rim spouting and a drain valve for jet spouting, respectively. Opening these drain valves allows water to be discharged from the rim spouting port and the jet spouting port, respectively.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2015-168994;

[0008] Patent Document 2: International Publication No. 2005 / 085538. Summary of the Invention

[0009] Problems to be solved by the invention

[0010] However, in the flush toilet described in Patent Document 1, flush water discharged from the water storage tank assembly first flows into a single conduit, which then branches, allowing flush water to be discharged from both the rim spout and the jet spout. Therefore, when flush water flows into the conduit connected to the water storage tank assembly, it is discharged from the lower jet spout. Subsequently, as the water level in the conduit rises, it begins to be discharged from the higher rim spout. Furthermore, if the drain valve is closed, the rim spout stops spouting early due to the higher position of the rim spout. Meanwhile, flush water remaining in the conduit is also discharged from the jet spout after the drain valve is closed. However, after the jet spout activates the siphon effect, the flush water discharged from the jet spout is neither used to clean the waste-receiving surface of the bowl nor to refill the bowl after washing, and therefore is not effectively utilized. Therefore, in the flush toilet described in Patent Document 1, it is difficult to achieve a high level of water conservation.

[0011] Furthermore, in conventional flush toilets equipped with a single drain valve, water is discharged from both the rim and jet outlets almost simultaneously. Therefore, flush water cannot always be discharged from the appropriate outlets at the appropriate time, and some of the used flush water is not fully utilized for flushing. This waste of flush water results in water being wasted.

[0012] On the other hand, the flush toilet described in Patent Document 2 has separate drain valves for rim and jet water spouting, allowing water to be spouted from the rim and jet outlets at different times. However, because the flush toilet described in Patent Document 2 uses a ball chain connected to an operating lever to pull up each drain valve (the ball chain is a common drive input component), the timing for starting water spouting from each outlet cannot be freely set. Therefore, the flush toilet described in Patent Document 2 cannot fully achieve the effect of reducing water waste.

[0013] Furthermore, the inventors of this case discovered that in the jet water conduit from the drain valve for jet water spouting to the jet water spouting port, instead of adopting a method in which the internal air is completely replaced by the cleaning water (complete exhaust) (the previous method), a method is adopted in which the water tightness of the water flow from the drain valve for jet water spouting to the jet water spouting port is maintained while a part of the internal air remains in the jet water conduit, thereby achieving efficient use of the cleaning water.

[0014] Therefore, an object of the present invention is to provide a flush toilet device that can effectively utilize the flush water accumulated in the flush water tank to ensure sufficient flushing performance and can also achieve water conservation.

[0015] The present invention is based on the above findings. Its purpose is to provide a flush toilet device that achieves efficient use of flush water by independently controlling the opening timing of each drain valve and maintaining watertightness of the water flow from the jet water discharge valve to the jet water outlet while retaining some internal air in the jet water conduit.

[0016] Means used to solve problems

[0017] In order to solve the above-mentioned problems, the present invention is a water-washing toilet device that cleans by using the clean water accumulated in the clean water tank, which is characterized in that it comprises: a water-washing toilet body, which comprises: a bowl; an inner rim water spouting port, which is arranged at the upper part of the bowl; a drainage bend pipe, which extends from the lower part of the bowl; and a jet water spouting port, which is arranged opposite to the inlet of the drainage bend pipe; a clean water tank body, which accumulates the clean water for cleaning the bowl of the water-washing toilet body; an inner rim water spouting and stopping switching mechanism, which makes the clean water accumulated in the clean water tank body spout or stop spouting from the inner rim water spouting port via the inner rim water guide channel provided on the water-washing toilet body; and a jet water spouting port. The jet-spit-stop switching mechanism causes the flush water accumulated in the flush water tank body to be ejected or stopped from the jet water spouting port via the jet water conduit provided on the flush toilet body. The rim water spouting-stop switching mechanism and the jet-spit-stop switching mechanism execute a cleaning sequence including the following steps: a first step, causing flush water to start being ejected from the rim water spouting port; a second step, after the first step, while flush water continues to be ejected from the rim water spouting port, causing flush water to start being ejected from the jet water spouting port, and activating the siphon effect in the drainage bend pipe; and a third step, after the second step, causing flush water to stop being ejected from the jet water spouting port, and continuing to eject flush water from the rim water spouting port.

[0018] According to the present invention thus constructed, a cleaning sequence is executed, comprising the following steps: a first step in which water is started to be discharged from the rim spouting port; a second step in which, after the first step, water is started to be discharged from the jet spouting port and the siphon effect is activated; and a third step in which, after the second step, the jet spouting is stopped and water continues to be discharged from the rim spouting port. As a result, after the bowl is cleaned in the first step, the second step is executed at a predetermined time, activating the siphon effect. This allows efficient use of water to clean the bowl and remove impurities. This ensures adequate cleaning performance while also conserving water.

[0019] In the present invention, preferably, the second step is performed after the water level of the accumulated water in the bowl portion rises due to the first step.

[0020] According to the present invention thus constructed, the second step is performed after the water level within the bowl has risen in the first step. Therefore, after the bowl has been thoroughly cleaned in the first step, the water level within the bowl has risen, and the water level within the drain trap has also risen, the second step begins to eject water. This allows the siphon effect to be activated sooner after the bowl has been cleaned, and allows for efficient bowl cleaning and waste removal using a smaller amount of flush water.

[0021] In the present invention, it is preferable that the second step is performed after the flush water in the drain trap pipe starts to overflow.

[0022] According to the present invention thus constructed, since the second step is executed after the water level in the drain trap pipe rises through the first step and the flushing water in the drain trap pipe begins to overflow, if the second step is started, the siphon effect can be generated as early as possible, and the amount of water required for jet spouting can be reduced, thereby achieving water conservation.

[0023] In the present invention, it is preferable that the lengths of time for executing the first step, the second step, and the third step are different from each other.

[0024] According to the present invention thus constituted, since the lengths of time for executing the first, second, and third steps are different from each other, the execution time suitable for the function of each step can be set, thereby making full use of washing water.

[0025] In the present invention, it is preferred that the time for executing the third step is longer than the time for executing the first step and the second step.

[0026] According to the present invention thus constituted, since the third step takes longer than the first and second steps, sufficient time can be allocated to refilling the bowl after the siphon effect ends, thereby enabling the use of flush water without waste.

[0027] In the present invention, preferably, the time for executing the first process is longer than the time for executing the second process.

[0028] Generally speaking, the cleaning effect of the bowl is improved by distributing a large amount of washing water over a longer period of time. On the other hand, once the siphon effect is activated, even if a large amount of washing water is used, the cleaning effect of the waste discharged by the siphon effect will not be greatly changed. According to the present invention constructed as described above, since the time for executing the first step is longer than the time for executing the second step, a large amount of washing water can be distributed to clean the bowl, thereby making full use of the washing water.

[0029] In the present invention, preferably, in the first step, the second step, and the third step, instantaneous flow rates of the washing water spouted from the rim spouting port are different from each other.

[0030] According to the present invention thus constructed, since the instantaneous flow rates of the cleaning water ejected from the inner rim water outlet are different in the first, second, and third steps, the flow rate suitable for the function of each step can be set, thereby making full use of the cleaning water.

[0031] In the present invention, preferably, in the third step, the instantaneous flow rate of the washing water spouted from the rim water spouting port is lower than that in the first step and the second step.

[0032] According to the present invention thus constructed, the instantaneous flow rate of the wash water discharged from the rim water outlet in the third step is lower than that in the first and second steps. Therefore, the wash water discharged from the rim water outlet in the third step hardly swirls in the bowl, but instead flows quickly toward the inlet of the drain trap. As a result, the rim water outlet facilitates the siphon effect initiated in the second step to discharge waste. Furthermore, since a high flow rate of rim washing is no longer required to induce siphoning after the siphoning action occurs, reducing the flow rate after siphoning occurs can help conserve water.

[0033] The present invention is a water-washing toilet device, which is a water-washing toilet device that cleans by accumulating flush water in a flush water tank, and is characterized in that it comprises: a water-washing toilet body, which has a bowl and a drainage bend pipe extending from the lower part of the bowl; a flush water tank, which is arranged on the rear side of the water-washing toilet body and accumulates flush water for cleaning the bowl of the water-washing toilet body; a first drain valve, which switches the discharge of flush water from the inner edge water spouting port provided at the upper edge of the bowl by opening or closing a first drain port provided at the flush water tank; and a second drain valve, which switches the discharge of flush water from the jet water spouting port provided at the front side of the lower part of the bowl by opening or closing a second drain port provided at the flush water tank, The drain valve and the second drain valve are driven based on different drive inputs, and the jet water conduit from the second drain valve to the jet water spouting port includes: an upstream area, which is located directly below the second drain valve; an intermediate area, which extends forward from the upstream area in a top-down perspective; and a downstream area, which extends laterally from the front area of ​​the intermediate area below the accumulated water level and bypasses the lower part of the basin and / or the drain bend pipe to reach the jet water spouting port, wherein the maximum value of a vertical section perpendicular to the front-to-back direction of the intermediate area is greater than the maximum value of a vertical section perpendicular to the front-to-back direction of the upstream area, and the maximum value of a vertical section perpendicular to the front-to-back direction of the intermediate area is greater than the maximum value of a vertical section perpendicular to the flow path direction of the downstream area.

[0034] According to the present invention, since the first drain valve and the second drain valve are driven by different drive inputs, the opening or closing timing of the first drain outlet and the opening or closing timing of the second drain outlet can be flexibly adjusted, thereby effectively achieving the effect of suppressing water waste.

[0035] Furthermore, according to the present invention, the maximum value of the vertical section perpendicular to the front-to-back direction of the middle area is larger than the maximum value of the vertical section perpendicular to the front-to-back direction of the upstream area, and larger than the maximum value of the vertical section perpendicular to the flow direction of the downstream area. By adopting such a dimensional relationship, it is possible to maintain the water tightness of the water flow in the jet water conduit (through which the head pressure of the washing water tank can be used for jet water discharge) while retaining a part of the internal air in the middle area, thereby achieving efficient use of the washing water (especially efficient use of the head pressure).

[0036] In addition, preferably, after water starts to be ejected from the jet spouting port, the flow rate of the cleaning water flowing through the upstream area is greater than the flow rate of the cleaning water flowing through the middle area, and the flow rate of the cleaning water flowing through the middle area is greater than the flow rate of the cleaning water flowing through the downstream area.

[0037] With this configuration, the watertightness of the water flow in the jet water conduit can be more reliably maintained, and the water head pressure of the flush water tank can be more reliably utilized for jet water spouting.

[0038] Furthermore, in this case, preferably, the maximum value of the vertical cross section perpendicular to the front-rear direction of the upstream region is larger than the maximum value of the vertical cross section perpendicular to the flow path direction of the downstream region.

[0039] With this configuration, the watertightness of the water flow in the jet water conduit can be more reliably maintained, and the water head pressure of the flush water tank can be more reliably utilized for jet water spouting.

[0040] Furthermore, in this case, preferably, the intermediate area is not filled with water during a period from when the second drain valve is opened to when the second drain valve is closed.

[0041] This makes it possible to reliably achieve efficient use of washing water.

[0042] Furthermore, preferably, the flush water tank is located above the inner rim water spouting port.

[0043] Based on this, the inner edge water discharge can also effectively utilize the head pressure of the flush water tank.

[0044] The flush water tank may be formed integrally with the flush toilet body, or may be formed separately from the flush toilet body.

[0045] Effects of the Invention

[0046] According to the flush toilet device of the present invention, it is possible to effectively utilize the flush water stored in the flush water tank to ensure sufficient flushing performance and to achieve water conservation.

[0047] According to the present invention, since the first drain valve and the second drain valve are driven so that the timing of opening or closing the first drain port and the timing of opening or closing the second drain port are different from each other, waste of water can be suppressed.

[0048] Furthermore, according to the present invention, the maximum value of the vertical section perpendicular to the front-to-back direction of the middle area is larger than the maximum value of the vertical section perpendicular to the front-to-back direction of the upstream area, and larger than the maximum value of the vertical section perpendicular to the flow direction of the downstream area. By adopting such a dimensional relationship, it is possible to maintain the water tightness of the water flow in the jet water conduit (through which the head pressure of the washing water tank can be used for jet water discharge) while retaining a part of the internal air in the middle area, thereby achieving efficient use of the washing water (especially efficient use of the head pressure). BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a plan view showing a schematic structure of a flush toilet apparatus according to a first embodiment of the present invention;

[0050] Figure 2 This is a side sectional view showing a schematic structure of a flush toilet apparatus according to a first embodiment of the present invention;

[0051] Figure 3 This is a block diagram showing a flush water supply system in a flush toilet apparatus according to a first embodiment of the present invention;

[0052] Figure 4 This is a front sectional view showing the internal structure of a flush water tank body included in the flush toilet apparatus of the first embodiment of the present invention;

[0053] Figure 5 This is a timing chart showing the operation of the flush toilet apparatus according to the first embodiment of the present invention;

[0054] Figure 6 This is a block diagram showing a flush toilet apparatus according to a second embodiment of the present invention;

[0055] Figure 7 2. It is a cross-sectional view showing a schematic structure of a flush water tank included in a flush toilet apparatus according to a second embodiment of the present invention;

[0056] Figure 82. It is a cross-sectional view showing the structure of a float valve built into a flush water tank in a flush toilet apparatus according to a second embodiment of the present invention;

[0057] Figure 9 2. It is a cross-sectional view showing the structure of a hydraulic drive mechanism built into a flush water tank in a flush toilet apparatus according to a second embodiment of the present invention;

[0058] Figure 10 1. This is a schematic side view showing a jet water conduit from a flush water tank to a jet water spouting port in a flush toilet apparatus according to a second embodiment of the present invention;

[0059] Figure 11 1. A schematic longitudinal sectional view of a jet water conduit extending from a flush water tank to a jet water spouting port in a flush toilet apparatus according to a second embodiment of the present invention;

[0060] Figure 12 It is along Figure 11 A cross-sectional view of FIG.

[0061] Figure 13 It is along Figure 11 A cross-sectional view of B;

[0062] Figure 14 It is along Figure 10 A cross-sectional view of C;

[0063] Figure 15A This is a schematic diagram showing the time course of jet water discharge in a comparative example structure (conventional type);

[0064] Figure 15B This is a schematic diagram showing the time course of jet water discharge in a comparative example structure (conventional type);

[0065] Figure 15C This is a schematic diagram showing the time course of jet water discharge in a comparative example structure (conventional type);

[0066] Figure 16A This is a schematic diagram showing the passage of time of jet water discharge in the second embodiment of the present invention;

[0067] Figure 16B This is a schematic diagram showing the passage of time of jet water discharge in the second embodiment of the present invention;

[0068] Figure 16C This is a schematic diagram showing the passage of time of jet water discharge in the second embodiment of the present invention;

[0069] Figure 17 Schematic diagram for explaining the function of the flush toilet apparatus according to the second embodiment of the present invention;

[0070] Figure 18 Schematic diagram for explaining the function of the flush toilet apparatus according to the second embodiment of the present invention;

[0071] Figure 19 Schematic diagram for explaining the function of the flush toilet apparatus according to the second embodiment of the present invention;

[0072] Figure 20 Schematic diagram for explaining the function of the flush toilet apparatus according to the second embodiment of the present invention;

[0073] Figure 21 This is a timing chart showing the operation of the flush toilet apparatus according to the second embodiment of the present invention;

[0074] Figure 22 This is a cross-sectional view showing a schematic structure of a flush water tank included in a flush toilet apparatus according to a third embodiment of the present invention;

[0075] Figure 23 This is a schematic diagram for explaining the function of the flush water tank in the flush toilet apparatus according to the third embodiment of the present invention;

[0076] Figure 24 1 is a timing chart showing the operation of the flush toilet apparatus according to the third embodiment of the present invention;

[0077] Figure 25 4 is a cross-sectional view showing a schematic structure of a flush water tank included in a flush toilet apparatus according to a fourth embodiment of the present invention;

[0078] Figure 26 It is a timing chart showing the operation of the flush toilet apparatus according to the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0079] Next, a flush toilet apparatus according to an embodiment of the present invention will be described with reference to the drawings.

[0080] Figure 1 It is a plan view showing a schematic structure of a flush toilet apparatus according to a first embodiment of the present invention. Figure 2 It is a side sectional view showing the schematic structure of the flush toilet apparatus according to the first embodiment of the present invention. Figure 3 This is a block diagram showing the flush water supply system in the flush toilet apparatus according to the first embodiment of the present invention. Figure 4 It is a front cross-sectional view showing the internal structure of a flush water tank body included in the flush toilet apparatus according to the first embodiment of the present invention.

[0081] like Figure 1 and Figure 2As shown in FIG. 1 , the flush toilet device 1 of the first embodiment of the present invention is configured to include a flush toilet body 2 and a flush water tank body 4 disposed at the rear of the flush toilet body 2. The flush toilet device 1 of this embodiment is configured such that after use, flushing is performed by operating a lever-type flush handle 4a disposed on the flush water tank body 4. It should be noted that in Figure 1 and Figure 2 In the figure, a drain valve and the like provided in the flush water tank body 4 are omitted from the figure.

[0082] 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 of the bowl 2a. 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 through a drainage connection (not shown) to a sewage pipe (not shown). It should be noted that in this embodiment, the cross-sectional area of ​​the jet spout 2d is larger than that of the rim spout 2c. Furthermore, when a plurality of rim spouting ports 2c are provided, it is preferable that the cross-sectional area of ​​the jet spouting port 2d be configured to be larger than the total cross-sectional area of ​​each rim spouting port 2c.

[0083] like Figure 3 As shown, flush water is supplied from a water supply source 6 such as a tap water pipe to the flush water tank body 4, and the supplied flush water is accumulated in the flush water tank body 4. In addition, a rim drain valve 8 and a jet drain valve 10 are configured to be built into the flush water tank body 4, and flush water is discharged or stopped from a drain port provided at the bottom of the flush water tank body 4.

[0084] In this embodiment, flush water discharged by opening the rim drain valve 8 passes through the rim conduit 2e formed inside the flush toilet body 2 and is discharged from the rim water spout 2c. Furthermore, flush water discharged by opening the jet drain valve 10 passes through the jet conduit 2f formed inside the flush toilet body 2 and is discharged from the jet water spout 2d.

[0085] Next, refer to Figure 3 and Figure 4 , the internal structure of the flush water tank body 4 is described.

[0086] like Figure 3 and Figure 4As shown, the interior of the flush water tank body 4 is equipped with an internal water tank 14. Furthermore, the interior of the flush water tank body 4 is equipped with: a rim drain valve 8, which is a rim water discharge / stop switching mechanism disposed outside the internal water tank 14 and within the flush water tank body 4; a jet drain valve 10, which is a jet water discharge / stop switching mechanism disposed within the internal water tank 14; a float valve 16, which is a water supply valve; and a hydraulic drive mechanism 18.

[0087] The flush water tank body 4 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 4 is made of ceramic, and the internal tank 14, disposed within the flush water tank body 4, is made of resin. It should be noted that, in this specification, "flush water stored in the flush water tank body 4" includes not only flush water stored in the flush water tank body 4 (outside the internal tank 14), but also flush water stored in the internal tank 14.

[0088] In addition, if Figure 1 and Figure 4 As shown, the bottom surface of the flush water tank body 4 is provided with an inner edge water discharge outlet 4b and a jet water discharge outlet 4c. In this embodiment, these outlets are circular. Figure 2 As shown, in this embodiment, the rim water spouting drain port 4b and the jet water spouting drain port 4c (in Figure 2 In the figure, only the jet water spouting outlet 4c is shown as being formed at the same height as the upper end surface of the bowl portion 2a, and the rim water spouting outlet 2c is formed below the upper end surface of the bowl portion 2a. Therefore, in this embodiment, both the rim water spouting outlet 4b and the jet water spouting outlet 4c are provided at a higher position than the lower end of the rim water spouting outlet 2c.

[0089] Furthermore, in this embodiment, the flush water accumulated in the flush water tank body 4 (and outside the internal tank 14) flows through the rim water spouting drain port 4b into the rim water conduit 2e of the flush toilet body 2, and the flush water accumulated in the internal tank 14 flows through the jet water spouting drain port 4c into the jet water conduit 2f of the flush toilet body 2. However, the internal tank 14 may be omitted. In this case, the flush water accumulated in a single (undivided) space within the flush water tank body 4 is supplied to the flush toilet body 2 through the rim water spouting drain port 4b and the jet water spouting drain port 4c, respectively.

[0090] like Figure 4As shown, the internal water tank 14 is disposed on the bottom surface of the flush water tank body 4. 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 concentrically with the jet water discharge outlet 4c provided in the flush water tank body 4. That is, in this embodiment, the center of the circular jet water discharge outlet 4c is aligned with the circular drain outlet 14a when viewed from above. Therefore, flush water within the internal water tank 14 is discharged through the drain outlet 14a of the internal water tank 14 and the jet water discharge outlet 4c of the flush water tank body 4, and flows into the jet water conduit 2f of the flush toilet body 2.

[0091] Furthermore, in this embodiment, the drain outlet 14a of the internal water tank 14 is formed by a drain outlet-forming member 14b, which is formed separately from the main body of the internal water tank 14. This drain outlet-forming member 14b is a cylindrical member that is watertightly attached to the bottom surface of the internal water tank 14, thereby forming the drain outlet 14a on the inside. Furthermore, a seating surface is provided at the top end of the drain outlet-forming member 14b, upon which the jet drain valve 10 seats, thereby closing the drain outlet 14a. Therefore, in this embodiment, the seating surface on which the jet drain valve 10 seats is formed by a separate component from the internal water tank 14.

[0092] Furthermore, an overflow pipe 15, serving as an exhaust path, is attached to the side of the drain opening forming member 14b. This overflow pipe 15 is an L-shaped tube that extends from the side of the drain opening forming member 14b and opens upward above the upper end of the inner water tank 14. Thus, the space inside the drain opening forming member 14b communicates with the outside air above the water surface of the inner water tank 14 through the overflow pipe 15.

[0093] When the level of the flush water in the flush water tank body 4 exceeds the height of the overflow pipe 15, the flush water flows into the overflow pipe 15 and is discharged into the jet water conduit 2f through the drain opening forming member 14b. On the other hand, when flush water flows into the jet water conduit 2f, the air in the air layer formed at the upstream end of the jet water conduit 2f is discharged to the outside air through the overflow pipe 15. That is, in the standby state of the flush toilet device 1, the flush water fills the upstream end of the jet water conduit 2f to the water level W2 ( Figure 2 、 Figure 4 ), and an air layer is formed between the water surface W2 and the jet drain valve 10. And, if the washing water flows into the air layer, the air in the air layer is squeezed out and discharged through the overflow pipe 15.

[0094] Specifically, the lower end of the overflow pipe 15 communicates with an opening 15a provided on the inner circumferential surface of the drain opening forming member 14b. This opening 15a is located below the jet drain valve 10 and at a higher level than the water surface W2 at the upstream end of the jet conduit 2f. In this manner, the overflow pipe 15 connects the interior of the jet conduit 2f with the air layer within the flush water tank body 4. This allows the interior of the jet conduit 2f to communicate with the outside air.

[0095] Next, if Figure 4 As shown, the rim drain valve 8 is a valve body configured to open or close the rim water discharge outlet 4b provided in the flush water tank body 4. By pulling the rim drain valve 8 upward, the rim water discharge outlet 4b is opened. As a result, the flush water in the flush water tank body 4 is discharged to the rim water conduit 2e ( Figure 1 Therefore, the rim drain valve 8 switches the discharge of flush water to the flush toilet body 2 or stops the discharge by opening or closing the rim drain port 4b provided on the flush water tank body 4.

[0096] It should be noted that, in this embodiment, the user rotates the lever-type flush handle 4a provided on the flush water tank body 4, thereby pulling the ball chain 8a ( Figure 4 ), and then pull up the inner rim drain valve 8. It should be noted that, as a modified example, the present invention can also be constructed in a manner such that the inner rim 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) to perform cleaning.

[0097] The jet drain valve 10 is a valve body configured to open or close the jet water discharge outlet 4c provided in the washing water tank body 4 and the discharge outlet 14a provided in the internal water tank 14. By pulling the jet drain valve 10 upward, the jet drain valve 10 is separated from the seat surface of the discharge outlet 14a, and the discharge outlet 14a is opened. As a result, the washing water in the internal water tank 14 flows into the jet water conduit 2f ( Figure 1 ).

[0098] As described above, by pulling the jet drain valve 10 upward, the flush water in the internal tank 14 is discharged from the drain port 14a and flows into the jet water conduit 2f ( Figure 1 It should be noted that, when the internal water tank 14 is omitted, the water in the water tank body 4 is discharged by directly opening or closing the water jet discharge port 4c through the water jet discharge valve 10.

[0099] In addition, if Figure 4 As shown, in this embodiment, the jet drain valve 10 is configured to be pulled up from the discharge port 14a by a hydraulic drive mechanism 18. Specifically, the jet drain valve 10 comprises a valve body having an upwardly extending valve shaft 10a, which is pulled up by the hydraulic drive mechanism 18. Furthermore, when the jet drain valve 10 is pulled up to a predetermined height, it is disconnected from the hydraulic drive mechanism 18 and slowly lowered, thereby closing the discharge port 14a. The structure of the hydraulic drive mechanism 18 will be described later.

[0100] Furthermore, the float valve 16 as a water supply valve is configured to allow flush water supplied from the water supply source 6 to flow in through the inflow pipe 16 a and to switch the supply or stop of flush water to be stored in the flush water tank body 4 and the internal tank 14 .

[0101] like Figure 4 As shown, the float valve 16 is connected to an inlet pipe 16a and an outlet pipe 16b, and the valve seat 20b is opened and closed by the internal main valve body 20a. The float valve 16 also includes a float 22 and an arm 24 that is rotated by the float 22. The float 22 of the float valve 16 operates in conjunction with the water level in the flush water tank body 4. When the float 22 drops to a predetermined position, the internal main valve body 20a opens, supplying flush water to the hydraulic drive mechanism 18.

[0102] Specifically, the float valve 16 has a main valve body 20a disposed therein to open or close a valve seat 20b. When the valve is open, tap water flowing from the inlet pipe 16a flows through the valve seat 20b and out to the outlet pipe 16b. The outlet pipe 16b is connected to the hydraulic drive mechanism 18.

[0103] The main valve body 20a is a roughly disc-shaped diaphragm-type valve body, installed in the float valve 16 so that it can be seated and unseated relative to the valve seat 20b. Furthermore, a pressure chamber 20c is formed within the float valve 16 on the opposite side of the main valve body 20a from the valve seat 20b. Furthermore, a pilot valve port (not shown) is provided in the float valve 16 to communicate with the interior of the pressure chamber 20c. When the pilot valve port (not shown) is closed, the pressure in the pressure chamber 20c increases, and the main valve body 20a is pressed against the valve seat 20b by this pressure, causing it to seat on the valve seat 20b.

[0104] Meanwhile, the float 22 is supported by an arm 24, to which a pilot valve (not shown) is connected. The pilot valve is configured to move as the arm 24 rotates. In this embodiment, the float 22 is disposed in the flush water tank body 4 and moves up and down according to the water level within the flush water tank body 4. Thus, when the water level within the flush water tank body 4 rises above a predetermined level, the float 22 is pushed upward, causing the pilot valve (not shown) to move and close the pilot valve port (not shown) provided in the float valve 16. On the other hand, if flush water within the flush water tank body 4 is drained, thereby lowering the water level, the float 22 moves downward, opening the pilot valve port (not shown). Therefore, when the toilet is on standby for flushing, that is, when the water level within the flush water tank body 4 is higher than the predetermined level, the pilot valve port (not shown) of the float valve 16 is closed.

[0105] Furthermore, tap water flowing from inlet pipe 16a into float valve 16 flows into pressure chamber 20c. With the pilot valve port (not shown) closed, the pressure in pressure chamber 20c rises. As the pressure in pressure chamber 20c rises, the main valve element 20a is pressed against valve seat 20b by this pressure, closing valve seat 20b.

[0106] On the other hand, when the rim drain valve 8 is opened during the flushing operation, if the water level in the flush water tank body 4 falls below the specified level, the float 22 drops, and the pilot valve (not shown) moves, thereby opening the pilot valve port (not shown). When the pilot valve port (not shown) opens, the pressure in the pressure chamber 20c decreases. As a result, the main valve body 20a moves away from the valve seat 20b, opening the valve seat 20b. Thus, when the pilot valve port (not shown) is open, the pressure in the pressure chamber 20c does not rise, so the valve seat 20b remains open.

[0107] Next, refer to Figure 4 , the structure of the water pressure drive mechanism 18 is explained.

[0108] The hydraulic drive mechanism 18 is configured to actuate the jet drain valve 10 using the water pressure of the flush water supplied from the tap water pipe to the flush water tank body 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 actuate the jet drain valve 10. Furthermore, a spring 18c is disposed within the cylinder 18a, biasing the piston 18b downward. A gasket is mounted on 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 drain valve 10.

[0109] Cylinder 18a is a cylindrical component with its axis aligned vertically. It slidably accommodates piston 18b within it. Furthermore, an outflow tube 16b extending from float valve 16 is connected to the lower end of cylinder 18a, allowing wash water flowing from float valve 16 to flow into cylinder 18a. Consequently, the water flowing into cylinder 18a causes piston 18b within cylinder 18a to overcome the force of spring 18c and be pushed upward.

[0110] On the other hand, the top end of cylinder 18a is provided with an outflow hole, which is connected to water supply pipe 32. 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. Furthermore, the washing water flowing into water supply pipe 32 flows into internal water tank 14.

[0111] The rod 28 is a rod-shaped member connected to the lower surface of the piston 18b. It extends downward from the cylinder 18a, passing through a through-hole formed in the bottom surface of the cylinder 18a. Furthermore, the lower end of the rod 28 is connected to the valve shaft 10a of the jet drain valve 10 via a clutch mechanism 30. The rod 28 connects the piston 18b to the jet 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 drain valve 10 upward, opening the jet drain valve 10.

[0112] 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 internal water tank 14. 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 overcome the force of the spring 18c and be pushed upward.

[0113] Furthermore, the clutch mechanism 30 detachably couples the rod 28 to the jet drain valve 10. When the jet 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 drain valve 10 from the rod 28. When the clutch mechanism 30 is disconnected, the jet drain valve 10 is no longer linked to the movement of the piston 18b and the rod 28. As the water level in the internal water tank 14 decreases, the jet drain valve 10 descends, closing the drain port 14a of the internal water tank 14.

[0114] Next, the first reference Figure 5 , the function of the flush toilet apparatus 1 according to the first embodiment of the present invention will be described.

[0115] Figure 5 This is a timing chart showing the operation of the flush toilet apparatus 1 according to the first embodiment of the present invention, showing the jet water spouting state, the rim water spouting state, the float valve state, and the water levels of each part in order from top to bottom.

[0116] First, in the toilet flushing standby state, the inner rim water discharge outlet 4b of the flush water tank body 4 and the outlet 14a of the inner water tank 14 are closed by the inner rim drain valve 8 and the jet drain valve 10 respectively. In addition, in the standby state, the initial water level in the flush water tank body 4 is higher than the specified water level, and thus the float valve 16 ( Figure 5 ) is in a closed state, and the valve seat 20b is closed by the main valve body 20a. Figure 2 As shown, in standby mode ( Figure 5 Before time t1), the water level W1 of the accumulated water in the bowl 2a, the water level W2 at the upstream end of the jet water conduit 2f, and the water level W3 in the drainage bend pipe 2b are the same and consistent with the height of the top 2g of the drainage bend pipe 2b.

[0117] Furthermore, since the water level W2 at the upstream end of the jet water conduit 2f is located below the jet water discharge outlet 4c of the washing water tank body 4, in the standby state, there is an air layer between the water surface at the upstream end of the jet water conduit 2f and the jet water discharge outlet 4c.

[0118] Next, in Figure 5 At time t1, if the user presses the lever type flush handle 4a ( Figure 4 ) is rotated, the ball chain 8a connected thereto pulls up the inner rim drain valve 8. As a result, the inner rim drain valve 8 is separated from the inner rim water spouting drain port 4b, and the inner rim water spouting drain port 4b is opened, and the first step S1 is started. In the first step S1, the inner rim water spouting drain port 4b is opened, and the washing water accumulated in the washing water tank body 4 (outside the internal water tank 14) flows from the inner rim water spouting drain port 4b into the inner rim water conduit 2e ( Figure 1 ) and is discharged from the inner edge water outlet 2c. The inner edge water discharge from the inner edge water outlet 2c forms a swirling flow on the waste receiving surface of the bowl portion 2a, thereby cleaning the waste receiving surface. The clean water discharged from the inner edge water outlet 2c forms a swirling flow on the inner wall surface of the bowl portion 2a. This swirling flow swirls around the bowl portion 2a at least once, thereby cleaning every part of the bowl portion 2a.

[0119] First, the washing water spouted from the inner rim water spouting port 2c flows into the bowl portion 2a, and the water level W1 of the accumulated water in the bowl portion 2a rises. Furthermore, since the bowl portion 2a and the drain bend pipe 2b are connected via the inlet of the drain bend pipe 2b, if the water level W1 of the accumulated water in the bowl portion 2a rises, the water level W3 in the drain bend pipe 2b will also rise. In this way, in the first step S1, the water level W3 in the drain bend pipe 2b rises by spouting water from the inner rim water spouting port 2c. It should be noted that, in this embodiment, the first step S1 ( Figure 5 The time t1~t2) lasts for about 2 seconds.

[0120] Furthermore, because the bowl 2a and the jet conduit 2f are connected via the jet spout 2d, if the water level W1 of the accumulated water in the bowl 2a rises, the wash water flows into the jet conduit 2f via the jet spout 2d. Therefore, after the water level W1 of the accumulated water in the bowl 2a rises, the water level W2 at the upstream end of the jet conduit 2f also rises.

[0121] As described above, in this embodiment, after the washing starts at time t1, the jet drain valve is opened ( Figure 5 Before the time t2), the washing water is supplied to the jet water conduit 2f. That is, in this embodiment, after the start of washing, the jet drain valve 10 is opened ( Figure 5 Before the moment t2), the inner edge drain valve 8 is opened ( Figure 5At time t1 ), washing water is discharged from the rim water spouting port 2c, thereby causing washing water to flow from the jet water spouting port 2d, thereby supplying washing water to the jet water conduit 2f.

[0122] As flush water is supplied into the jet conduit 2f, the water level W2 at the upstream end of the jet conduit 2f rises. However, as described above, an air layer exists between the water surface at the upstream end of the jet conduit 2f and the jet water discharge outlet 4c. Therefore, as the water level W2 at the upstream end of the jet conduit 2f rises, the air in the air layer is discharged to the outside air (above the water surface in the flush water tank body 4) through the overflow pipe 15, which serves as an exhaust path.

[0123] However, even when the water level W2 reaches its highest point before the jet drain valve 10 opens, it remains lower than the jet water discharge outlet 4c, leaving an air layer. Specifically, the jet water conduit 2f is configured so that, even when flush water is being supplied to the jet water conduit 2f before the jet drain valve 10 opens, an air layer remains within the conduit. It should be noted that even when the water level W2 at the upstream end of the jet water conduit 2f rises, the opening 15a provided on the inner circumferential surface of the drain outlet forming member 14b, which communicates with the overflow pipe 15, remains higher than the water surface W2. Therefore, flush water does not intrude from the lower end of the overflow pipe 15 due to the rising water level W2.

[0124] Furthermore, as described above, after the start of water spouting from the inner rim spouting port 2c, before the jet drain valve 10 is opened, as the water level W2 rises, the water level W3 in the drain trap conduit 2b also rises. Figure 5 As shown in FIG. 1 , the water level W3 in the drain trap pipe 2b rises earlier than the water level W2 and the amount of the rise is greater. In this way, by supplying the washing water into the jet water conduit 2f, the water level W2 in the jet water conduit 2f rises, and at the time when the jet drain valve 10 is opened ( Figure 5 At time t2), the water level W3 in the drainage trap conduit 2b rises to be higher than the water level W2 in the jet water conduit 2f.

[0125] On the other hand, the washing water is discharged from the inner edge water discharge port 4b, and the water level in the washing water tank body 4 is lowered. Figure 4 ) float 22 drops, thereby opening the pilot valve port (not shown). As a result, the pressure in the pressure chamber 20c drops and the main valve body 20a opens, and the washing water is supplied to the hydraulic drive mechanism 18 ( Figure 4 ).

[0126] When washing water is supplied to the hydraulic drive mechanism 18, the water flowing into the cylinder 18a overcomes the force of the spring 18c and pushes the piston 18b upward. This causes the rod 28 connected to the piston 18b to pull up the valve shaft 10a of the jet drain valve 10, thereby opening the outlet 14a of the internal water tank 14. In other words, the jet drain valve 10 is driven open by the water pressure of the tap water supplied via the float valve 16.

[0127] Therefore, in Figure 5 At time t2, the outlet 14a is opened and the second step S2 is started. In this way, after the water level W1 of the accumulated water in the bowl portion 2a rises in the first step S1, the second step S2 is executed. In the second step S2, the washing water accumulated in the internal water tank 14 flows into the jet water conduit 2f ( Figure 2 ) and is discharged from the jet water spouting port 2d. The cross-sectional area of ​​the jet water spouting port 2d is larger than that of the rim water spouting port 2c. Furthermore, the head pressure of the washing water in the internal tank 14 is higher than that in the washing water tank body 4. Therefore, the instantaneous flow rate of the jet water spouting is greater than that of the rim water spouting.

[0128] Furthermore, by the jet water spouting from the jet water spouting port 2d, the drain bend pipe 2b is filled with water, thereby inducing a siphon effect. Due to the occurrence of the siphon effect, the retained water and dirt in the bowl 2a are sucked into the drain bend pipe 2b and discharged to the sewage pipe (not shown). In this way, in the second process S2, after the first process S1, while the washing water continues to be spouted from the inner edge water spouting port 2c, the washing water begins to be spouted from the jet water spouting port 2d, and the siphon effect is activated in the drain bend pipe 2b. It should be noted that in this embodiment, the second process S2 ( Figure 5 The time t2~t3) lasts for about 1.5 seconds.

[0129] That is, Figure 5As shown, the outlet 14a is opened at time t2. If the washing water is discharged from the jet water spouting port 2d, the water level W3 in the drain bend pipe 2b rises in a short time, and the drain bend pipe 2b is filled with water. As a result, due to the siphon effect, the accumulated water in the bowl 2a is sucked into the drain bend pipe 2b, and the water level W1 of the accumulated water in the bowl 2a drops. In addition, as mentioned above, the water level W3 in the drain bend pipe 2b has risen before the jet drain valve 10 is opened. Therefore, if the jet water spouting starts, the drain bend pipe 2b is filled with water as soon as possible, thereby shortening the time from the start of the jet water spouting to the occurrence of the siphon effect. (It should be noted that when the jet drain valve 10 is open and the washing water flows into the jet water conduit 2f from the jet water spouting port 4c, it is difficult to correctly determine the water level W2 at the end of the upstream side of the jet water conduit 2f. Therefore, Figure 5 The graph of water level W2 between time t2 and t3 shows the general situation.)

[0130] Furthermore, as described above, the water level W2 at the upstream end of the jet conduit 2f rises before the jet drain valve 10 opens, shrinking the air layer above the water level W2. Therefore, when the jet drain valve 10 opens, the air layer at the upstream end of the jet conduit 2f quickly fills with water, allowing the flushing water to be discharged from the jet spout 2d as quickly as possible. It should be noted that in this embodiment, the jet drain valve 10 opens at or after the time the water level in the jet conduit 2f reaches its highest point.

[0131] As described above, in the flush toilet device 1 of this embodiment, a siphon effect can be initiated within the drain trap conduit 2b as soon as possible after the jet drain valve 10 is opened. In particular, because the water level in the internal tank 14 is high, the flush water initially discharged from the jet spouting outlet 4c (discharge port 14a) has a high head pressure. In this embodiment, the air layer at the upstream end of the jet conduit 2f is relatively small, so flush water with a high head pressure shortly after drainage begins is less likely to be wasted in the air-filled layer. As a result, flush water with a high head pressure can be effectively used for toilet flushing, and the instantaneous flow rate of flush water discharged from the jet spouting port 2d can be increased. Furthermore, the jet conduit 2f is constructed so that an air pool forms near its top surface even after the jet drain valve 10 is opened. This reduces the effective volume of the jet conduit 2f, thereby minimizing flush water wasted before the siphon effect is initiated.

[0132] On the other hand, when the jet drain 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 4), and the valve shaft 10a of the jet drain valve 10 is disconnected from the rod 28. As a result, the jet drain valve 10 descends toward the discharge port 14a as the water level in the internal water tank 14 decreases. Figure 5 At time t3, the jet water discharge valve 10 is seated on the discharge port 14a, thereby closing the discharge port 14a. As a result, the jet water spouting from the jet water spouting port 2d is stopped, and the third step S3 is started.

[0133] When the jet drain valve 10 is closed and the jetting stops, the siphon effect within the drain trap conduit 2b ceases, and the wash water within the bowl 2a is no longer drawn into the drain trap conduit 2b. Meanwhile, since water continues to be discharged from the rim spouting port 2c, the water level W1 within the bowl 2a begins to rise after the jet drain valve 10 is closed. Thus, after the siphon effect ceases, the wash water discharged from the rim spouting port 2c in the third step S3 does not drain into the drain trap conduit 2b and can therefore be used to refill the accumulated water within the bowl 2a. Consequently, the water level W2 within the jet conduit 2f also rises. Furthermore, due to the cessation of the siphon effect, the water level W3 within the drain trap conduit 2b drops rapidly.

[0134] 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 through the float valve 16 and is supplied to the hydraulic drive mechanism 18 through the water supply pipe 32 ( Figure 4 ) and flows into the internal water tank 14. Figure 5 At time t3 , after the jet water spouting stops, the water level in the internal tank 14 rises due to the flush water flowing in from the water supply pipe 32 .

[0135] On the other hand, since the rim drain valve 8 is still open, the water in the water tank body 4 flows out from the rim water discharge port 4b, and the water level in the water tank body 4 continues to decrease. Figure 5 At time t4, when the water level in the flush water tank body 4 drops to the specified water stop level, the rim drain valve 8 seats on the rim water spouting outlet 4b, closing the rim drain valve 8. This stops rim water spouting from the rim water spouting outlet 2c. Furthermore, at time t4 when rim water spouting stops, the water level W1 in the bowl portion 2a, the water level W2 in the jet conduit 2f, and the water level W3 in the drain trap conduit 2b return to their standby levels.

[0136] In this way, in the third step S3 ( Figure 5 In the time t3 to t4), after the second step, the washing water is stopped from being ejected from the jet spouting port 2d, while the washing water is continuously ejected from the inner edge spouting port 2c. It should be noted that, in this embodiment, the third step S3 ( Figure 5That is, the flush toilet apparatus 1 of this embodiment is configured to execute a flushing sequence including the first step S1, the second step S2, and the third step S3.

[0137] Furthermore, in this embodiment, from the first step S1 to the third step S3, water is continuously discharged from the rim water spouting port 2c by the head pressure of the flush water within the flush water tank body 4. Therefore, the instantaneous flow rate of flush water discharged from the rim water spouting port 2c decreases as the water level within the flush water tank body 4 decreases. In the flush toilet apparatus 1 of this embodiment, the instantaneous flow rate of rim water spouting at the start of the first step S1 is approximately 12 (L / min), and the instantaneous flow rate of rim water spouting at the end of the third step S3 is approximately 8 (L / min). Furthermore, in the flush toilet apparatus 1 of this embodiment, the total amount of flush water discharged from the rim water spouting port 2c and the jet water spouting port 2d is approximately 3.8 (L).

[0138] Furthermore, the lengths of time for executing the first step S1, the second step S2, and the third step S3 are different from each other. In this embodiment, the third step S3 ( Figure 5 The time from time t3 to time t4 is longer than the time for executing the first step S1 (time t1 to time t2) and the time for executing the second step S2 (time t2 to time t3). Furthermore, the time for executing the first step S1 is longer than the time for executing the second step S2.

[0139] Furthermore, water is discharged from the rim spouting port 2c based on the hydraulic head pressure of the flush water accumulated in the flush water tank body 4. This hydraulic head pressure decreases as the water level in the flush water tank body 4 drops. As a result, the instantaneous flow rates of flush water discharged from the rim spouting port 2c differ in the first, second, and third steps S3, which are sequentially performed starting with the water level in the flush water tank body 4 being high. Specifically, because the water level in the flush water tank body 4 drops in the third step S3, the instantaneous flow rate of flush water discharged from the rim spouting port 2c is lower than in the first and second steps S1, S2.

[0140] Furthermore, after the inner rim drain valve 8 is closed, the main valve body 20a of the float valve 16 is also maintained in the open state. Therefore, the washing water supplied from the water supply source 6 (tap water pipe) flows from the water supply pipe 32 into the inner water tank 14 through the float valve 16 and the hydraulic drive mechanism 18. As a result, the water level in the inner water tank 14 rises. Figure 5 At time t5, if the internal tank 14 is full of water, the flush water flowing into the internal tank 14 from the water supply pipe 32 overflows and flows into the flush water tank body 4. As a result, the water level in the flush water tank body 4 starts to rise.

[0141] Next, when the water level in the washing water tank body 4 rises to a predetermined level, the float 22 of the float valve 16 rises, and the pilot valve (not shown) closes. In this way, when the pilot valve closes, the pressure in the pressure chamber 20d rises. Figure 5 At time t6, the main valve body 20a is pressed by the pressure in the pressure chamber 20c 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 internal water tank 14 is stopped.

[0142] If the water supply to the hydraulic drive mechanism 18 is stopped, the piston 18b ( Figure 4 ) is pushed down by the force of spring 18c. Rod 28 attached to piston 18b also lowers accordingly. When rod 28 is lowered to a predetermined position, it is reconnected to valve shaft 10a of jet drain valve 10 via clutch mechanism 30. As described above, a single toilet flushing cycle is completed, and flush toilet apparatus 1 returns to its standby state for toilet flushing.

[0143] The flush toilet apparatus 1 according to the first embodiment of the present invention executes a flushing sequence comprising the following steps: a first step S1, which starts discharging flush water from the rim spouting port 2c; a second step S2, which, after the first step S1, starts discharging flush water from the jet spouting port 2d and activates the siphon effect; and a third step S3, which, after the second step S2, stops the jet spouting and continues discharging flush water from the rim spouting port 2c. As a result, after the bowl 2a is cleaned in the first step S1, the second step S2 is executed at a predetermined time, activating the siphon effect. This allows flush water to be efficiently used to clean the bowl 2a and remove waste. This ensures adequate flushing performance while also achieving water conservation.

[0144] Furthermore, according to the flush toilet apparatus 1 of this embodiment, the second step S2 is performed after the water level W1 of the accumulated water in the bowl 2a has risen in the first step S1. Therefore, after the bowl 2a has been fully cleaned in the first step S1, the accumulated water level W1 in the bowl 2a has risen, and the water level W3 in the drainage trap pipe 2b has also risen, the jetting of water is performed in the second step S2. Therefore, after the bowl 2a has been cleaned, the siphon effect can be activated as soon as possible, and the bowl 2a can be cleaned and waste discharged efficiently using a small amount of flush water.

[0145] Furthermore, according to the flush toilet device 1 of this embodiment, since the second process S2 is executed after the water level W3 in the drainage bend pipe 2b rises due to the first process S1 and the flush water in the drainage bend pipe 2b begins to overflow, if the second process S2 is started, the siphon effect can occur as early as possible and the amount of water required for jetting water can be reduced, thereby achieving water saving.

[0146] Furthermore, according to the flush toilet apparatus 1 of this embodiment, since the lengths of time for executing the first step S1, the second step S2, and the third step S3 are different from each other, the execution time suitable for the function of each step can be set, thereby making full use of flush water.

[0147] Furthermore, according to the flush toilet device 1 of this embodiment, since the time for executing the third step S3 is longer than the time for executing the first step S1 and the second step S2, sufficient time can be allocated to refilling the bowl 2a with water after the siphon action is completed, so that the flush water can be used without waste.

[0148] Furthermore, according to the flush toilet apparatus 1 of this embodiment, since the time for executing the first step S1 is longer than the time for executing the second step S2, a large amount of flush water can be allocated to flushing the bowl 2a, thereby enabling full utilization of the flush water.

[0149] Furthermore, according to the flush toilet device 1 of this embodiment, since the instantaneous flow rates of flush water ejected from the inner rim water outlet in the first step S1, the second step S2, and the third step S3 are different from each other, the flow rate suitable for the function of each step can be set, thereby making full use of the flush water.

[0150] Furthermore, according to the flush toilet apparatus 1 of this embodiment, the instantaneous flow rate of flush water discharged from the rim water outlet 2c in the third step S3 is lower than in the first and second steps S1 and S2. Therefore, the flush water discharged from the rim water outlet 2c in the third step S3 does not swirl much in the bowl 2a, but rather flows quickly toward the inlet of the drainage trap conduit 2b. As a result, the rim water outlet assists in the siphon action initiated in the second step S2 to discharge waste. Furthermore, if a large flow rate of flush water is discharged from the rim water outlet 2c during the siphon action, this flush water will be discharged from the drainage trap conduit 2b, thus failing to be effectively utilized. According to the flush toilet apparatus 1 of this embodiment, since the instantaneous flow rate of flush water in the third step S3 is reduced, the amount of flush water wasted by the siphon action can be reduced, thereby achieving water conservation.

[0151] The flush toilet apparatus according to an embodiment of the present invention has been described above, but various modifications can be made to the above-described embodiment. In particular, in the above-described embodiment, the jet drain valve 10 is opened by using the hydraulic drive mechanism 18, thereby opening the jet drain valve 10 after the rim drain valve 8 is opened. In contrast, as a modified example, the rim drain valve 8 and / or the jet drain valve 10 can be opened using the power of a motor (not shown), and the motor can be operated to delay the opening of the jet drain valve 10. Alternatively, the rim drain valve 8 and the jet drain valve 10 can be pulled up by a ball chain or the like connected to the lever-type flush handle 4a, and the ball chain or the like attached to the jet drain valve 10 can be set longer so that the jet drain valve 10 opens after the rim drain valve 8 is opened.

[0152] In the above-described embodiment, the rim drain valve 8 is used as the rim water spouting / stopping switching mechanism, and the jet drain valve 10 is used as the jet water spouting / stopping switching mechanism. However, it is also possible to switch between the discharge and cessation of flush water from the rim water spouting port 2c or the jet water spouting port 2d using a structure other than a drain valve. For example, a pressure accumulator (not shown) capable of pressurizing flush water within the flush water tank body using a pressure spring or the like can be pre-installed, and the discharge and cessation of flush water pressurized by the pressure accumulator can be switched using an electrically controllable on / off valve (not shown). Furthermore, the present invention can also be configured such that the pressure accumulator is used to enable or disable at least one of the discharge and cessation of flush water from the rim water spouting port 2c or the jet water spouting port 2d, and the drain valve is used to enable or disable the other of the discharge and cessation of flush water from the rim water spouting port 2c or the jet water spouting port 2d, thereby switching between discharge and cessation.

[0153] (Second embodiment)

[0154] Next, a flush toilet apparatus according to a second embodiment of the present invention will be described with reference to the drawings.

[0155] Figure 6 This is a block diagram showing a flush toilet apparatus according to a second embodiment of the present invention. Figure 7 It is a cross-sectional view showing a schematic structure of a flush water tank included in a flush toilet apparatus according to a second embodiment of the present invention. Figure 8 It is a cross-sectional view showing the structure of a float valve built into a flush water tank in a flush toilet apparatus according to a second embodiment of the present invention. Figure 9 This is a cross-sectional view showing the structure of a hydraulic drive mechanism built into a flush water tank in a flush toilet apparatus according to a second embodiment of the present invention.

[0156] (Basic Structure)

[0157] like Figure 6 As shown, a flush toilet device 101 according to an embodiment of the present invention includes a flush toilet body 102 serving as a flush toilet, and a flush water tank 104 located at the rear of the flush toilet body 102. The flush toilet device 101 of this embodiment is configured so that after use, flushing is performed by operating a lever-type flush handle 104a provided in the flush water tank 104. As a variation, the present invention can also be configured such that flushing is performed based on a control signal from a remote control device (not shown) or a detection signal from a human body sensor (not shown).

[0158] The flush toilet body 102 includes a bowl 102a and a drain elbow conduit 102c extending from the lower portion of the bowl 102a. Furthermore, a rim spout 102d is provided at the upper edge of the bowl 102a, and a jet spout 102e is provided at the lower portion of the bowl 102a. When flushing the toilet, flush water is discharged from the rim spout 102d and jet spout 102e at predetermined times, thereby cleaning the waste-receiving surface of the bowl 102a. The waste and flush water within the bowl 102a are then discharged into the drain elbow conduit 102c. The waste and flush water discharged into the drain elbow conduit 102c are then discharged into a sewage pipe (not shown) through a drainage connection (not shown).

[0159] Flushing water is supplied from a water supply source 106 such as a tap to the flushing water tank 104 via a stopcock 108. The supplied flushing water accumulates in the flushing water tank 104 to a predetermined level. The stopcock 108 is provided to stop the supply of flushing water to the flushing water tank 104 during maintenance, etc., and is normally in the "open" position. Furthermore, a first drain valve 110, which serves as a rim water discharge / stop switching mechanism, and a second drain valve 112, which serves as a jet water discharge / stop switching mechanism, are built into the flushing water tank 104 and respectively open or close the first drain port 104b and the second drain port 104c provided at the bottom of the flushing water tank 104. The flushing water tank 104 may be integral with the flushing toilet body 102 or may be separate from the flushing toilet body 102.

[0160] The flush water flowing out of the first drain port 104b passes through the rim conduit 102f formed within the flush toilet body 102 and is discharged from the rim spouting port 102d. That is, the flush water tank 104 is located above the rim spouting port 102d. Therefore, the first drain valve 110 switches the flow of flush water from the rim spouting port 102d between open and close. Furthermore, the flush water flowing out of the second drain port 104c passes through the jet conduit 102g formed within the flush toilet body 102 and is discharged from the jet spouting port 102e. Therefore, the second drain valve 112 switches the flow of flush water from the jet spouting port 102e between open and close.

[0161] (Internal Structure)

[0162] Next, refer to Figure 7 , the internal structure of the cleaning water tank 104 is described.

[0163] like Figure 7 As shown, the flush water tank 104 includes a first drain valve 110 that opens or closes the first drain port 104 b , a second drain valve 112 that opens or closes the second drain port 104 c , a float valve 114 that serves as a delay mechanism, and a hydraulic drive mechanism 116 .

[0164] The flush water tank 104 is a tank configured to store flush water to be supplied to the flush toilet body 102 , and has a first drain port 104 b and a second drain port 104 c formed at its bottom for discharging the stored flush water to the flush toilet body 102 .

[0165] The first drain valve 110 is a valve body configured to open or close the first drain port 104b. By pulling the first drain valve 110 upward, the first drain port 104b is opened. As a result, the flush water in the flush water tank 104 is discharged to the inner edge water conduit 102f ( Figure 6 ) and spit out from the inner edge water outlet 102d.

[0166] In this embodiment, the user rotates the lever-type flush handle 104a provided on the flush water tank 104, thereby pulling the ball chain 110a ( Figure 7), and then pull up the first drain valve 110. In addition, in this embodiment, the first drain valve 110 is a valve body having a floating ball 110b, and is configured to be opened by being pulled up from the first drain port 104b, and then slowly descend as the water level in the flush water tank 104 decreases, and close when it drops to a specified water level.

[0167] The second drain valve 112 is a valve body configured to open or close the second drain port 104c. By pulling the second drain valve 112 upward, the second drain port 104c is opened. As a result, the flush water in the flush water tank 104 is discharged to the jet water conduit 102g ( Figure 6 ) and is ejected from the jet water outlet 102e.

[0168] In this embodiment, the second drain valve 112 is configured to be pulled up from the second drain outlet 104c by a hydraulic drive mechanism 116 (using the action of the hydraulic drive mechanism 116 as a driving input). The second drain valve 112 comprises a valve body having an upwardly extending valve shaft 112a and a floating ball 112b. The hydraulic drive mechanism 116 pulls the valve shaft 112a upward. Once raised to a predetermined height, the valve shaft 112a is disconnected from the hydraulic drive mechanism 116 and gradually descends as the water level in the flush water tank 104 decreases, closing the second drain outlet 104c.

[0169] Furthermore, in this embodiment, since the floating ball 112b of the second drain valve 112 is mounted at a higher position than the floating ball 110b of the first drain valve 110, when the water level in the flush water tank 104 is relatively high, the second drain valve 112 seats on the second drain outlet 104c, closing it. Specifically, when the first drain valve 110 and the second drain valve 112 lower as the water level in the flush water tank 104 decreases, the second drain valve 112 first seats on the second drain outlet 104c, closing it.

[0170] The float valve 114, serving as a delay mechanism, is configured to allow wash water supplied from the water supply source 106 to flow in through the inlet pipe 114a. The action of the float valve 114 delays the activation of the hydraulic drive mechanism 116. As a result, in this embodiment, the second drain valve 112 opens later than the first drain valve 110 (the extent of this "delay" can be adjusted by the structural design of the float valve 114).

[0171] (Float valve 114)

[0172] Next, refer to Figure 8 , the structure of the float valve 114 is described.

[0173] like Figure 8As shown, the float valve 114 includes a main body 118 connected to the inlet pipe 114a and the outlet pipe 114b; a main valve body 120 disposed within the main body 118; a valve seat 122 on which the main valve body 120 is seated; an arm 126 rotated by a float 124; and a pilot valve 128 moved by the rotation of the arm 126. Specifically, the float valve 114 is configured to include the float 124, which operates in conjunction with the water level in the flush water tank 104. When the float 124 is lowered to a predetermined position (which can be adjusted through structural design), flush water is supplied to the hydraulic drive mechanism 116.

[0174] The main body 118 is a component with a connection section for the inlet pipe 114a at its lower portion and a connection section for the outlet pipe 114b on one side. A valve seat 122 is formed inside the main body 118, which communicates with the outlet pipe 114b connected to the connection section. Furthermore, a main valve body 120 is located inside the main body 118 to open and close the valve seat 122. When the valve is open, tap water flowing into the inlet pipe 114a flows through the valve seat 122 and out of the outlet pipe 114b. The outlet pipe 114b is connected to the hydraulic drive mechanism 116.

[0175] The main valve body 120 is a diaphragm valve body having a substantially circular plate shape and is mounted in the main body 118 so as to be seated and unseated relative to the valve seat 122. In addition, a drain hole 120a is provided at the peripheral edge of the main valve body 120. In addition, in the main body 118, on the side opposite to the valve seat 122 relative to the main valve body 120 (on the opposite side of the valve seat 122), a drain hole 120a is provided. Figure 8 A pressure chamber 118a is formed on the left side (in the center). Specifically, the pressure chamber 118a is defined by the inner wall surface of the main body 118 and the main valve body 120. When the pressure in the pressure chamber 118a increases, the main valve body 120 is pressed toward the valve seat 122 by the pressure, and is seated on the valve seat 122.

[0176] Furthermore, the pressure passage 118b extends upward to communicate with the pressure chamber 118a provided in the main body 118, and a pilot valve port 128a is provided at the upper end of the pressure passage 118b. The pilot valve port 128a is open upward and is opened or closed by the pilot valve 128.

[0177] Meanwhile, the float 124 is supported by an arm 126 rotatably supported by a support shaft 126 a . Furthermore, a pilot valve 128 is coupled to the arm 126 , and the pilot valve 128 moves vertically as the arm 126 rotates.

[0178] Thus, when the water level in the flush water tank 104 rises to above the predetermined set water level L101, the float 124 is pushed upward, and accordingly, the pilot valve 128 moves downward and seats on the pilot valve port 128a, closing it. On the other hand, if the flush water in the flush water tank 104 is drained, thereby lowering the water level in the flush water tank 104, the float 124 moves downward, thereby moving the pilot valve 128 upward, and the pilot valve port 128a opens. (Therefore, when the toilet is on standby for flushing, that is, when the water level in the flush water tank 104 is higher than the set water level L101, the pilot valve port 128a of the main body 118 is closed.)

[0179] Furthermore, the tap water flowing into the main body 118 from the inlet pipe 114 a flows into the annular space around the valve seat 122 , and from there flows into the pressure chamber 118 a through the discharge hole 120 a of the main valve body 120 .

[0180] When the pilot valve port 128a is closed by the pilot valve 128, the tap water flowing into the pressure chamber 118a from the drain hole 120a has no way to flow out, so the pressure in the pressure chamber 118a rises. Figure 8 The right side in the figure is pressed, so that the valve seat 122 is closed by the main valve body 120.

[0181] On the other hand, when the first drain valve 110 is opened by the washing operation, if the water level in the washing water tank 104 is lower than the set water level L101, the float 124 drops, the pilot valve 128 moves upward, and the pilot valve port 128a opens. When the pilot valve port 128a opens, the water in the pressure chamber 118a flows out from the pilot valve port 128a, and the pressure in the pressure chamber 118a decreases. As a result, the main valve body 120 moves away from the valve seat 122 (towards the valve seat 122). Figure 8 The left side in the pilot valve port 128a moves, thereby opening the valve seat 122. In this way, when the pilot valve port 128a is open, the pressure in the pressure chamber 118a does not rise, and therefore, the valve seat 122 becomes an open state.

[0182] (Hydraulic drive mechanism 116)

[0183] Next, refer to Figure 9 , the structure of the water pressure drive mechanism 116 is explained.

[0184] The hydraulic drive mechanism 116 utilizes the water pressure of the flush water supplied from the tap water pipe to the flush water tank to actuate the second drain valve 112. Specifically, the hydraulic drive mechanism 116 comprises a cylinder 116a, into which water supplied from the float valve 114 flows; a piston 116b slidably disposed within the cylinder 116a; and a rod 130 protruding from the lower end of the cylinder 116a and used to actuate the second drain valve 112. Furthermore, a spring 116c is positioned within the cylinder 116a, biasing the piston 116b downward. A gasket is installed within the piston 116b to ensure watertightness between the inner wall of the cylinder 116a and the piston 116b. Furthermore, a clutch mechanism 132 is provided at the lower end of the rod 130, which connects and disconnects the rod 130 from the valve shaft 112a of the second drain valve 112.

[0185] Cylinder 116a is a cylindrical component with its axis aligned vertically. It slidably accommodates piston 116b. Furthermore, the lower end of cylinder 116a is connected to an outflow tube 114b extending from float valve 114. Wash water flowing from float valve 114 flows into cylinder 116a. Consequently, the water flowing into cylinder 116a causes piston 116b in cylinder 116a to overcome the force of spring 116c and be pushed upward.

[0186] On the other hand, an outflow hole is provided at the upper end of cylinder 116a, and water supply pipe 134 communicates with the interior of cylinder 116a via this outflow hole. Therefore, when water flows into cylinder 116a from outflow pipe 114b connected to the lower portion of cylinder 116a, piston 116b is pushed upward from the lower portion of cylinder 116a. When piston 116b is pushed above the outflow hole, the water flowing into cylinder 116a flows out of the outflow hole into water supply pipe 134. The wash water flowing into water supply pipe 134 falls into the wash water tank 104, thereby supplying the wash water to the wash water tank 104.

[0187] Rod 130 is a rod-shaped component connected to the lower surface of piston 116b. It extends downward from cylinder 116a, passing through a through-hole formed in the bottom surface of cylinder 116a. Furthermore, the lower end of rod 130 is connected to valve shaft 112a of second drain valve 112 via clutch mechanism 132. In other words, rod 130 connects piston 116b to second drain valve 112 via clutch mechanism 132. Therefore, when water flows into cylinder 116a and piston 116b is pushed upward, rod 130, connected to piston 116b, lifts second drain valve 112 upward, opening it.

[0188] It should be noted that a gap is provided between the rod 130 protruding from the bottom of the cylinder 116a and the inner wall of the through-hole of the cylinder 116a. Some of the water flowing into the cylinder 116a flows out through this gap. The water flowing out of this gap flows into the washing water tank 104. However, 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 116a increases due to the water flowing into the cylinder 116a from the outflow pipe 114b, causing the piston 116b to overcome the force of the spring 116c and be pushed upward.

[0189] Furthermore, the clutch mechanism 132 detachably couples the rod 130 to the second drain valve 112. When the second drain valve 112 and the rod 130 are raised to a predetermined distance, the clutch mechanism 132 disconnects the valve shaft 112a of the second drain valve 112 from the rod 130. In this disconnected state, the second drain valve 112 is no longer linked to the movement of the piston 116b and the upper portion of the rod 130, and therefore descends as the water level in the flush water tank 104 decreases.

[0190] (Jet water conduit 102g)

[0191] Next, Figure 10 and Figure 11 They are a schematic side view and a schematic longitudinal sectional view respectively showing the jet water conduit 102g from the flush water tank 104 to the jet water spouting port 102e.

[0192] like Figure 10 and Figure 11 As shown, the jet water spout 102e is provided on the front side of the lower portion of the bowl portion 102a.

[0193] like Figure 10 and Figure 11 As shown, the jet water conduit 102g has: an upstream side area 161, which is located directly below the second drain valve 112; a middle area 162, which extends forward from the upstream side area 161 in a top-down perspective; and a downstream side area 163, which extends laterally from the front side area of ​​the middle area 162 below the water level and bypasses the lower part of the basin 102a and the drainage bend pipe 102c to reach the jet water outlet 102e.

[0194] Furthermore, in this embodiment, the vertical cross section perpendicular to the front-rear direction of the upstream region 161 is located at Figure 11 The maximum value is about 2400 mm at the A section on the most downstream side of the upstream area 161. 2 .exist Figure 12 The A section is shown in FIG.

[0195] In addition, in this embodiment, the vertical cross section perpendicular to the front-back direction of the middle region 162 is located at Figure 11 The maximum value is about 7300mm at the B section near the rear end of the toilet seat surface. 2 .exist Figure 13 The B section is shown in FIG.

[0196] In addition, in this embodiment, the vertical cross section perpendicular to the flow path direction of the downstream area 163 is located at Figure 10 The maximum value is about 2000 mm at the C section of the connection between the downstream area 163 and the middle area 162 (the transition part from the middle area 162). 2 .exist Figure 14 The C section is shown in FIG.

[0197] According to the above dimensional relationship, (1) the maximum value of the vertical cross section perpendicular to the front-back direction of the middle region 162 ( Figure 13 ) is greater than the maximum value of the vertical cross section perpendicular to the front-back direction of the upstream region 161 ( Figure 12 ) is large, (2) the maximum value of the vertical cross section perpendicular to the front-back direction of the middle region 162 ( Figure 13 ) is greater than the maximum value of the vertical cross section perpendicular to the flow direction of the downstream area 163 ( Figure 14 ) is large, (3) the maximum value of the vertical cross section perpendicular to the front-back direction of the upstream area 161 ( Figure 12 ) is greater than the maximum value of the vertical cross section perpendicular to the flow direction of the downstream area 163 ( Figure 14 )big.

[0198] In addition, in this embodiment, after the water spouting from the jet water outlet 102e starts, the flow rate of the cleaning water flowing through the upstream area 161 is greater than the flow rate of the cleaning water flowing through the middle area 162, and the flow rate of the cleaning water flowing through the middle area 162 is greater than the flow rate of the cleaning water flowing through the downstream area 163.

[0199] Furthermore, in the present embodiment, the intermediate region 162 is not filled with water during the period from when the second drain valve 112 is opened to when the second drain valve 112 is closed (the state in which air remains continues in a part of the intermediate region 162 ).

[0200] This is illustrated in the comparative example structure (conventional type). Figures 15A to 15C As shown, in the period from when the second drain valve 112 is opened to when the second drain valve 112 is closed, the middle area 162 is filled with water. In contrast, in this embodiment, as shown in FIG. 16A to 16C As shown, the middle region 162 is not filled with water.

[0201] Thus, through Figure 15C and Figure 16C It is clear from the comparison that the water head pressure of the flush water tank 104 can be efficiently utilized to perform jet water spouting.

[0202] (Basic function)

[0203] Next, refer to Figures 17 to 21 , the function of the flush toilet device 101 according to the second embodiment of the present invention will be described.

[0204] Figures 17 to 20 This is a schematic diagram for explaining the operation of the flush toilet apparatus 101 according to the second embodiment of the present invention. Figure 21 It is a timing chart showing the operation of the flush toilet apparatus 101 according to the second embodiment of the present invention.

[0205] First, in the toilet flushing standby state, if Figure 7 As shown, the first drain port 104b and the second drain port 104c of the flush water tank 104 are closed by the first drain valve 110 and the second drain valve 112, respectively. In addition, in this standby state, the initial water level L102 in the flush water tank 104 is higher than the predetermined set water level L101 (the reason why the initial water level L102 is higher than the set water level L101 will be described later). As a result, the main body 118 ( Figure 8 ) is in a closed state, and the valve seat 122 is closed by the main valve body 120.

[0206] Next, in Figure 21 At time t101, if the user rotates the lever-type flush handle 104a of the flush water tank 104 to flush the toilet, the ball chain 110a connected thereto pulls up the first drain valve 110. Figure 17 As shown, the first drain valve 110 is separated from the first drain port 104 b , so that the first drain port 104 b is opened.

[0207] When the first drain port 104b is opened, the flush water stored in the flush water tank 104 flows from the first drain port 104b into the rim water conduit 102f ( Figure 6 ) and spit out from the inner edge water spouting port 102d. By the inner edge spouting water from the inner edge water spouting port 102d, a swirling flow is formed on the waste receiving surface of the bowl portion 102a, thereby cleaning the waste receiving surface.

[0208] The washing water is discharged from the first drain port 104b, and the water level in the washing water tank 104 is lowered. Figure 21 At time t102, if the water level in the washing water tank 104 becomes lower than the set water level L101, the float 124 of the float valve 114 is lowered, and the pilot valve 128 ( Figure 8 ) is opened. As a result, the pressure in the pressure chamber 118a is reduced and the main valve body 120 is opened. Figure 18 As shown, water supply to the hydraulic drive mechanism 116 is started.

[0209] When washing water is supplied to the hydraulic drive mechanism 116, it flows into the cylinder 116a ( Figure 9 ) overcomes the force of spring 116c and pushes piston 116b upward. Consequently, rod 130 connected to piston 116b pulls up valve shaft 112a of second drain valve 112, opening second drain port 104c. Specifically, second drain valve 112 is driven and opened by hydraulic drive mechanism 116 (a separate driving input from the user pulling up ball chain 110a), which operates based on the water pressure supplied via float valve 114.

[0210] When the second drain port 104c is opened, the flush water stored in the flush water tank 104 flows from the second drain port 104c into the jet water conduit 102g ( Figure 6 ) and is discharged from the jet water outlet 102e (see Figure 16). The jet water from the jet water outlet 102e fills the drain trap conduit 102c with water, inducing a siphon effect. The siphon effect draws accumulated water and waste within the bowl 102a into the drain trap conduit 102c and discharges it to the sewage pipe (not shown).

[0211] When the second drain valve 112 is pulled up to a predetermined height together with the piston 116b of the hydraulic drive mechanism 116, the clutch mechanism 132 ( Figure 9 ), and the valve shaft 112a of the second drain valve 112 is disconnected from the rod 130. As a result, the second drain valve 112 descends toward the second drain port 104c. Figure 21 At time t103, Figure 19 As shown, the second drain valve 112 is seated in the second drain port 104c, closing the second drain port 104c. This stops the jet water spouting from the jet water spouting port 102e. It should be noted that, as described above, since the floating ball 112b of the second drain valve 112 is mounted at a higher position, the second drain valve 112 is seated in the second drain port 104c earlier than the first drain valve 110.

[0212] exist Figure 19 In the state shown, since the main valve body 120 of the float valve 114 is in an open state, the cleaning water supplied from the water supply source 6 (tap water pipe) is supplied to the water pressure drive mechanism 116 via the float valve 114, and flows into the cleaning water tank 104 through the water supply pipe 134 connected to the cylinder 116a.

[0213] On the other hand, since the first drain valve 110 is still in the open state, the water in the water tank 104 flows out from the first drain port 104b and is discharged from the inner edge water outlet 102d. Figure 21 At time t103, after the jet water spouting stops, the washing water spouted from the rim water spouting port 102d is used as refill water to restore the water level in the bowl portion 102a to the water level of the accumulated water in the standby state.

[0214] In this embodiment, the flow rate of the washing water flowing out of the first drain port 104b is adjusted to be greater than the flow rate of the washing water flowing into the washing water tank 104 from the water supply pipe 134. Figure 19 In the state shown, the water level in the washing water tank 104 decreases, and the first drain valve 110 also drops. Figure 21 At time t104, if the water level in the washing water tank 104 drops to the water stop level DWL, Figure 20 As shown, the first drain valve 110 is seated on the first drain port 104b, and the first drain valve 110 is closed. As a result, the rim water spouting from the rim water spouting port 102d is stopped.

[0215] Furthermore, since the main valve body 120 of the float valve 114 is also maintained in an open state after the first drain valve 110 is closed, the washing water supplied from the water supply source 106 (tap water pipe) flows into the washing water tank 104 through the float valve 114, the hydraulic drive mechanism 116 and the water supply pipe 134. As a result, the water level in the washing water tank 104 rises. Figure 21 At time t105, if the water level in the washing water tank 104 rises to the set water level L101, the float 124 of the float valve 114 rises, and the pilot valve 128 ( Figure 8 )closure.

[0216] Furthermore, when the pilot valve 128 is closed, the washing water flowing into the pressure chamber 118a from the drain hole 120a of the main valve body 120 provided in the float valve 114 cannot flow out, and the pressure in the pressure chamber 118a increases. Figure 21 At time t106, the main valve body 120 is pressed by the pressure in the pressure chamber 118a and seats on the valve seat 122, thereby closing the main valve body 120. As a result, the water supply from the water supply source 106 to the hydraulic drive mechanism 116 via the float valve 114 is stopped, and the supply of washing water to the washing water tank 104 is stopped.

[0217] If the water supply to the hydraulic drive mechanism 116 is stopped, the piston 116b ( Figure 9) is pushed down by the force of the spring 116c. The rod 130 installed on the piston 116b also lowers. When the rod 130 is lowered to the specified position, the rod 130 is connected to the valve shaft 112a of the second drain valve 112 again through the clutch mechanism 132. Through the above actions, one toilet flushing is completed and the water flushing toilet device 101 is restored to Figure 7 The toilet flushing standby state is shown.

[0218] As described above, according to this embodiment, the water level in the flush water tank 104 rises to the set water level L101 and the pilot valve 128 is closed ( Figure 21 The time t105) and the time when the main valve body 120 of the float valve 114 is closed ( Figure 21 Furthermore, since the main valve body 120 is still open during the period from time t105 to time t106, the supply of washing water continues. At time t106, when the main valve body 120 is closed, the water level in the washing water tank 104 reaches the initial water level L102 which is higher than the set water level L101.

[0219] As a result, the initial water level L102 in the flush water tank 104 of the flush toilet apparatus 101 in the standby state is higher than the predetermined set water level L101 when the pilot valve 128 is closed. Figure 21 At time t101), the water level in the washing water tank 104 is higher than the set water level L101, so the main valve body 120 of the float valve 114 is not opened.

[0220] From time t101 to time t102, a predetermined amount of wash water is discharged from first drain port 104b as rim water spouting. When the water level in the wash water tank 104 drops to set level L101, pilot valve 128 opens, thereby also opening main valve body 120 of float valve 114. Consequently, at time t102, water supply to hydraulic drive mechanism 116 begins, and the second drain valve 112 opens due to the action of hydraulic drive mechanism 116, thereby initiating jet water spouting.

[0221] As described above, according to the flush toilet apparatus of the second embodiment of the present invention, since the first drain valve 110 switches the discharge or stop of flush water from the rim water spouting port 102d, and the second drain valve 112 switches the discharge or stop of flush water from the jet water spouting port 102e, the timing of the rim water spouting and the jet water spouting can be freely and independently set, and the bowl portion 102a (of the toilet body 102) can be effectively flushed with less flush water. Figure 6 ).

[0222] In particular, since the first drain valve 110 and the second drain valve 112 are driven by different drive inputs (the rotation operation of the lever-type flush handle 104a to pull up the ball chain 110a / the action of the water pressure drive mechanism 116 generated based on the water supply pressure of the cleaning water (tap water) supplied through the float valve 114), the opening or closing timing of the first drain outlet 104b and the opening or closing timing of the second drain outlet 104c can be flexibly adjusted, thereby effectively achieving the effect of suppressing water waste.

[0223] In addition, since the second drain valve 112 is opened by the water pressure driving mechanism 116 using the water supply pressure of the washing water, there is no need to use electrical power such as a motor to pull up the drain valve, and the opening timing can be set without using a complex mechanism for opening the drain valve.

[0224] Furthermore, according to the flush toilet apparatus of this embodiment, the second drain valve 112 opens later than the first drain valve 110 due to the float valve 114 serving as a delay mechanism ( Figure 21 ), therefore, according to the structure of the water-washing toilet body 102, the inner edge water spouting port 102d and the jet water spouting port 102e can start spouting water at the necessary time, thereby suppressing the amount of flushing water and effectively cleaning the bowl portion 102a.

[0225] Furthermore, according to the flush toilet device 101 of this embodiment, since the second drain valve 112 is opened by the hydraulic drive mechanism 116, the timing of supplying flush water to the hydraulic drive mechanism 116 can be adjusted ( Figure 21 The timing at which the jet water spouting port 102e starts spouting water is adjusted based on the time t102 in the flow chart, so that the timing at which the jet water spouting starts can be freely set.

[0226] In addition, according to the water-washing toilet device of this embodiment, if the float 124 of the float valve 114 is lowered to a specified position, the flushing water is supplied to the water pressure driving mechanism 116. Therefore, the supply of flushing water to the water pressure driving mechanism 116 can be started at an appropriate time based on the water level in the flushing water tank 104, so that the jet water spouting port 102e starts to spout water.

[0227] (Effects related to water jetting)

[0228] Furthermore, according to the flush toilet device of this embodiment, the maximum value of the vertical cross-section perpendicular to the front-to-back direction of the middle area 162 is larger than the maximum value of the vertical cross-section perpendicular to the front-to-back direction of the upstream area 161, and larger than the maximum value of the vertical cross-section perpendicular to the flow direction of the downstream area 163. By adopting such a dimensional relationship, it is possible to maintain the water tightness of the water flow in the jet water conduit 102g (through which the head pressure of the flush water tank 104 can be used for jet water spitting), and at the same time, a part of the internal air remains in the middle area 162, thereby achieving efficient use of flush water (especially efficient use of the head pressure).

[0229] In addition, according to the water-washing toilet device of this embodiment, after the water spouting of the water spouting port 102e starts, the flow rate of the flushing water flowing through the upstream area 161 is greater than the flow rate of the flushing water flowing through the middle area 162, and the flow rate of the flushing water flowing through the middle area 162 is greater than the flow rate of the flushing water flowing through the downstream area 163, thereby more effectively maintaining the water tightness of the flushing water flow in the jet water conduit 102g, and more effectively utilizing the head pressure of the flushing water tank 104 for the jetting of water.

[0230] Furthermore, according to the flush toilet device of this embodiment, the maximum value of the vertical cross-section perpendicular to the front-to-back direction of the upstream area 161 is larger than the maximum value of the vertical cross-section perpendicular to the flow direction of the downstream area 163, thereby being able to further effectively maintain the water tightness of the water flow in the jet water conduit 102g, and being able to further effectively use the head pressure of the flush water tank 104 for jet water spouting.

[0231] Furthermore, according to the flush toilet apparatus of this embodiment, the intermediate area 162 is not filled with water from the time the second drain valve 112 is opened until the second drain valve 112 is closed (see FIG. 16 ). This allows for efficient use of flush water (particularly, efficient use of water head pressure).

[0232] (Effects related to inner edge spitting water)

[0233] Furthermore, according to the flush toilet apparatus of this embodiment, since the flush water tank 104 is located above the rim water spouting port 102d, the water head pressure of the flush water tank 104 can also be efficiently utilized for rim water spouting.

[0234] (Third embodiment)

[0235] Next, refer to Figures 22 to 24 , a flush toilet device according to a third embodiment of the present invention is described.

[0236] In the flush toilet apparatus of this embodiment, the structure of the delay mechanism provided within the flush water tank differs from that of the second embodiment described above. Therefore, the following description will focus solely on the structures and functions of the third embodiment that differ from those of the second embodiment. Identical structures will be assigned the same reference numerals, and their description will be omitted.

[0237] Figure 22 It is a cross-sectional view showing a schematic structure of a flush water tank included in a flush toilet apparatus according to a third embodiment of the present invention. Figure 23 This is a schematic diagram for explaining the function of the flush water tank in the flush toilet apparatus according to the third embodiment of the present invention. Figure 24 This is a timing chart showing the operation of the flush toilet apparatus according to the third embodiment of the present invention.

[0238] like Figure 22 As shown, the flush water tank 104 provided in the flush toilet device of this embodiment includes a first drain valve 110, a second drain valve 112, a float valve 114, and a hydraulic drive mechanism 116. Furthermore, similar to the second embodiment described above, the float valve 114 includes a float 124. This float 124 opens or closes the pilot valve, thereby opening or closing the main valve body of the float valve 114. In this embodiment, in addition to the float valve 114, a small tank 140 is provided as a delay mechanism. This small tank 140 is arranged to surround the float 124 of the float valve 114.

[0239] The small water tank 140 is a small water tank that is arranged in the washing water tank 104 in a manner that surrounds the buoy 124. The buoy 124 moves up and down according to the water level in the small water tank 140. Figure 22 In the standby state of the flush toilet device shown, the small water tank 140 is arranged in the clean water tank 104 in a state of being completely immersed in water. That is, the small water tank 140 is formed into a box shape with an upper opening so as to be able to receive the buoy 124 from above, and its upper end is arranged at a position lower than the initial water level L102 in the clean water tank 104. Figure 22 In the standby state shown, the small water tank 140 is completely immersed in the cleaning water in the cleaning water tank 104, and the small water tank 140 is full of cleaning water.

[0240] Furthermore, the bottom surface of the small water tank 140 is provided with a drain hole 140a. This drain hole 140a is opened and closed by a check valve float 142 installed on the bottom surface of the small water tank 140. The check valve float 142 includes a float portion, which is buoyed by the water in the water tank 104, and a gasket, which is used to close the drain hole 140a. The check valve float 142 is attached to the bottom surface of the small water tank 140 so that it can move up and down to open and close the drain hole 140a.

[0241] Specifically, the check valve float 142 is configured to be pushed upward by the buoyancy exerted on the float portion. Therefore, when the water level in the flush water tank 104 is higher than the bottom of the small tank 140, the gasket of the check valve float 142 is pressed against the drain hole 140a on the bottom of the small tank 140 by the buoyancy, closing the drain hole 140a. On the other hand, if the water level in the flush water tank 104 drops, the check valve float 142 also drops due to its own weight, opening the drain hole 140a and draining the flush water from the small tank 140 into the flush water tank 104.

[0242] With this structure, when the water level in the flush water tank 104 drops, the water level in the small tank 140 drops later than the water level in the flush water tank 104. Because the float 124 of the float valve 114 drops in conjunction with the drop in the water level in the small tank 140, the main valve body of the float valve 114 opens later than the drop in the water level in the flush water tank 104. This delays the supply of flush water to the hydraulic drive mechanism 116, that is, the opening of the second drain valve 112.

[0243] Next, refer to Figure 23 and Figure 24 , the function of the flush toilet device of the third embodiment of the present invention is described.

[0244] First, in Figure 24 At time t111, when the user rotates the lever-type flush handle 104a of the flush water tank 104 to flush the toilet, the ball chain 110a connected thereto pulls up the first drain valve 110. As a result, the first drain port 104b opens, and the flush water in the flush water tank 104 is discharged from the inner rim spout 102d.

[0245] The wash water is discharged from the first drain port 104b, causing the water level in the wash water tank 104 to drop. However, since the water level in the wash water tank 104 is higher than the bottom of the small tank 140, the discharge hole 140a of the small tank 140 is closed by the check valve float 142. Therefore, the water level in the small tank 140 does not change. Consequently, the float 124 in the small tank 140 does not drop, and the main valve body of the float valve 114 remains closed.

[0246] If the water level in the washing water tank 104 further drops and becomes lower than the bottom surface of the small water tank 140, the check valve float 142 of the small water tank 140 opens, and the washing water in the small water tank 140 also starts to flow out from the discharge hole 140a. Figure 24 At time t112, if the water level in the small water tank 140 becomes lower than the predetermined set water level L103, Figure 23 As shown, the float 124 of the float valve 114 descends, opening the pilot valve. This opens the main valve body 120 of the float valve 114, and water begins to be supplied to the hydraulic drive mechanism 116. As water is supplied to the hydraulic drive mechanism 116, the second drain valve 112 is pulled up by the hydraulic drive mechanism 116 based on the water supply pressure, and the jet water spout 102e begins to spout water (see Figure 16).

[0247] After the jet water spouting port 102e starts spouting water at time t112, the operation of closing the second drain valve 112 at time t113 and the operation of closing the first drain valve 110 at time t114 are similar to those in the second embodiment, and thus their description is omitted.

[0248] At time t114, after the first drain valve 110 closes, the water level in the flush water tank 104 rises. Furthermore, when the water level in the flush water tank 104 is higher than the bottom of the small tank 140, the drain hole 140a of the small tank 140 is closed by the buoyancy acting on the check valve float 142, preventing the water level in the small tank 140 from rising. If the water level in the flush water tank 104 rises further, exceeding the top of the small tank 140, flush water flows into the small tank 140, causing the water level in the small tank 140 to rise.

[0249] Furthermore, at time t115, if the water level in the small water tank 140 becomes higher than the predetermined set water level L103, the pilot valve closes. Furthermore, at time t116, the main valve body of the float valve 114 closes, and the water supply to the hydraulic drive mechanism 116 stops. As a result, the rod extending from the piston 116b of the hydraulic drive mechanism 116 is lowered, and the rod is reconnected to the valve shaft of the second drain valve 112 through the action of the clutch mechanism 132. Through the above actions, the toilet flushing is completed once, and the water flushing toilet device is restored to the normal state. Figure 22 The toilet flushing standby state is shown.

[0250] According to the third embodiment of the present invention, the delay mechanism has a small water tank 140 and a check valve float 142. If the water level in the small water tank 140 is lower than the specified set water level L103, the flush water is supplied to the hydraulic drive mechanism 116 ( Figure 23) Therefore, by adjusting the structure of the small water tank 140 and the like, the timing of supplying washing water to the water pressure drive mechanism 116 can be freely set, so that water spouting can be started at a timing suitable for washing.

[0251] Next, refer to Figure 25 and Figure 26 , a flush toilet device according to a fourth embodiment of the present invention is described.

[0252] In the flush toilet apparatus of this embodiment, the structure of the delay mechanism provided within the flush water tank differs from that of the aforementioned second embodiment. Therefore, the following description will focus solely on the structures and functions of the fourth embodiment of the present invention that differ from those of the second embodiment. Identical structures will be assigned the same reference numerals, and their description will be omitted.

[0253] Figure 25 It is a cross-sectional view showing a schematic structure of a flush water tank included in a flush toilet apparatus according to a fourth embodiment of the present invention. Figure 26 It is a timing chart showing the operation of the flush toilet apparatus according to the fourth embodiment of the present invention.

[0254] like Figure 25 As shown, the flush water tank 104 provided in the flush toilet apparatus of this embodiment includes a first drain valve 110 , a second drain valve 112 , a first float valve 150 , a second float valve 152 , and a hydraulic drive mechanism 116 .

[0255] The first float valve 150, similar to the float valve 114 in the first embodiment, operates in conjunction with the water level in the flush water tank 104 to initiate water supply to the flush water tank. Specifically, the first float valve 150 includes a float 124, which moves up and down in conjunction with the water level in the flush water tank 104, thereby opening or closing the pilot valve and, consequently, the main valve body of the first float valve 150.

[0256] Furthermore, in this embodiment, a second float valve 152 is provided as a delay mechanism in addition to the first float valve 150 .

[0257] The second float valve 152 is located downstream of the first float valve 150 and upstream of the hydraulic drive mechanism 116. When the main valve body of the first float valve 150 opens, washing water begins to be supplied to the second float valve 152. The second float valve 152 also includes a float 156 and operates in conjunction with the water level in the washing water tank 104 to open or close the built-in main valve body. In other words, the structure of the second float valve 152 is the same as that of the float valve 114 in the second embodiment described above.

[0258] A water inlet 158 ​​is provided in the pipe between the first float valve 150 and the second float valve 152. When the first float valve 150 is open and the second float valve 152 is closed, all the washing water flowing out of the first float valve 150 is discharged from the water inlet 158 ​​and flows into the washing water tank 104.

[0259] Furthermore, the first float valve 150 is configured to open when the water level in the flush water tank 104 drops to a predetermined first water level L104. The second float valve 152 is configured to open when the water level in the flush water tank 104 drops to a predetermined second water level L105, which is lower than the first water level L104. Therefore, the second float valve 152 is configured to open later, after the first drain valve 110 opens and the water level in the first tank portion 154a begins to drop. Furthermore, when the second float valve 152 opens, water supply to the hydraulic drive mechanism 116 begins.

[0260] Next, refer to Figure 26 , the function of the flush toilet device of the fourth embodiment of the present invention is described.

[0261] First, in Figure 24 At time t111, when the user rotates the lever-type flush handle 104a of the flush water tank 104 to flush the toilet, the ball chain 110a connected thereto pulls up the first drain valve 110. As a result, the first drain port 104b opens, and the flush water in the flush water tank 104 is discharged from the inner rim spout.

[0262] As the wash water is discharged from the first drain port 104b, the water level in the wash water tank 104 decreases. When the water level in the wash water tank 104 drops to a predetermined first water level L104, the main valve body of the first float valve 150 opens. In this state, since the main valve body of the second float valve 152 is not open, all the wash water supplied from the water supply source and passing through the first float valve 150 flows into the wash water tank 104 through the water supply port 158.

[0263] In this embodiment, the flow rate of the flush water discharged from the first drain port 104b is adjusted to be greater than the flow rate of the flush water flowing into the flush water tank 104 from the water supply port 158. Therefore, after the first float valve 150 is opened, the water level in the flush water tank 104 also decreases.

[0264] If the water level in the washing water tank 104 further decreases until it reaches the predetermined second water level L105, the main valve body of the second float valve 152 also opens. Figure 26At time t122, water starts to be supplied to the hydraulic drive mechanism 116. When water supply to the hydraulic drive mechanism 116 starts, the second drain valve 112 is pulled up by the action of the hydraulic drive mechanism 116, and water starts to be spouted from the jet water spouting port 102e.

[0265] Furthermore, the washing water supplied to the hydraulic drive mechanism 116 flows into the washing water tank 104 through the cylinder of the hydraulic drive mechanism 116. It should be noted that when the main valve bodies of the first float valve 150 and the second float valve 152 are open, a portion of the washing water supplied to the washing water tank 104 flows into the washing water tank 104 from the water supply port 158, and the remaining washing water flows into the washing water tank 104 through the cylinder of the hydraulic drive mechanism 116.

[0266] After time t122, when the second drain valve 112 is pulled up to a predetermined height, the second drain valve 112 is disconnected from the rod of the hydraulic drive mechanism 116 by the clutch mechanism 132, and the second drain valve 112 starts to descend. Figure 26 At time t123, the second drain valve 112 is seated on the second drain port 104c, stopping the spouting of water from the jet spouting port 102e. After the second drain valve 112 is closed, the first and second float valves 150 and 152 remain open, allowing water to continue flowing into the flush water tank 104 through the water supply port 158 ​​and the hydraulic drive mechanism 116.

[0267] Since the first drain valve 110 is still open after the second drain valve 112 is closed, even if the washing water flows into the washing water tank 104, the water level in the washing water tank 104 is also lowered. Figure 26 At time t124, when the water level in the flush water tank 104 drops to the predetermined water stop level, the first drain valve 110 seats on the first drain port 104b, stopping the spouting of water from the inner rim spout 102d. Closing the first drain valve 110 causes the water level in the flush water tank 104 to begin rising.

[0268] Then, at time t125, if the water level in the flush water tank 104 exceeds the second water level L105, the main valve body of the second float valve 152 closes. Consequently, all of the flush water supplied from the water source flows into the flush water tank 104 through the water supply port 158. Furthermore, since the supply of flush water from the second float valve 152 to the hydraulic drive mechanism 116 has ceased, the rod extending from the piston 116b of the hydraulic drive mechanism 116 descends and reconnects to the valve shaft of the second drain valve 112 via the clutch mechanism 132.

[0269] Furthermore, at time t126, if the water level in the flush water tank 104 exceeds the first water level L104, the main valve body of the first float valve 150 is closed, and the supply of flush water to the flush water tank 104 is also stopped. As a result, the supply of flush water from the water supply source to the flush water tank 104 is stopped. Through the above actions, one toilet flushing is completed and the flush toilet device is restored to Figure 25 The toilet flushing standby state is shown.

[0270] The flush toilet apparatus according to the fourth embodiment of the present invention comprises: a first float valve 150 which starts water supply to the flush water tank 104 at the first water level L104 ( Figure 26 and a second float valve 152, which starts supplying washing water to the hydraulic drive mechanism 116 at a second water level L105 lower than the first water level L104 ( Figure 26 Therefore, by setting (adjusting) the float 156 of the second float valve 152, etc., the timing of supplying washing water to the hydraulic drive mechanism 116 can be freely set, and water discharge can be started at a timing suitable for washing.

[0271] While the embodiments of the present invention have been described above, various modifications can be made to the aforementioned embodiments. In particular, while the aforementioned embodiments delay the start of jet water spouting after the start of rim water spouting, the present invention can also be configured so that rim water spouting begins after the start of jet water spouting. In this case, the present invention can be configured so that the first drain valve, which switches between discharging and stopping flush water from the rim water spouting port, is opened by a hydraulic drive mechanism.

[0272] Furthermore, in the above-described embodiment, the first and second drain outlets of the flush water tank are provided separately. However, these drain outlets may also be configured so as to overlap each other when viewed from above. In this case, for example, the present invention may be configured as follows: the first and second drain outlets are pre-arranged in a concentric circle, the inner drain outlet is opened or closed by a circular drain valve, and the outer drain outlet is opened or closed by a donut-shaped plate-shaped drain valve.

[0273] It should be noted that the present invention includes the following features (inventions).

[0274] (Feature 1)

[0275] A flush toilet device that performs flushing using flush water stored in a flush water tank, characterized in that it comprises:

[0276] A flush toilet body comprising a bowl and a drain trap extending from a lower portion of the bowl;

[0277] a flush water tank disposed at the rear side of the flush toilet body and storing flush water for flushing the bowl of the flush toilet body;

[0278] a first drain valve that switches the discharge of flush water from an inner edge water spout provided at an upper edge of the bowl portion or stops the discharge of flush water by opening or closing a first drain port provided at the flush water tank; and

[0279] The second drain valve switches the discharge of the washing water from the jet water spouting port provided on the front side of the lower portion of the bowl or stops the discharge of the washing water by opening or closing the second drain port provided in the washing water tank.

[0280] The first drain valve and the second drain valve are driven based on different (not common) drive inputs.

[0281] The jet water conduit from the second drain valve to the jet water spouting port includes:

[0282] an upstream area located directly below the second drain valve;

[0283] a middle region extending forward from the upstream region in a top view; and

[0284] The downstream area extends laterally from the front area of ​​the intermediate area at a position lower than the accumulated water level and bypasses the lower portion of the bowl and / or the drain bend pipe to reach the jet water outlet (arranged on the front side of the lower portion of the bowl).

[0285] The maximum value of the vertical cross section perpendicular to the front-rear direction of the intermediate region is greater than the maximum value of the vertical cross section perpendicular to the front-rear direction of the upstream region.

[0286] The maximum value of the vertical cross section perpendicular to the front-rear direction of the intermediate region is larger than the maximum value of the vertical cross section perpendicular to the flow path direction of the downstream region.

[0287] (Feature 2)

[0288] The flush toilet device according to feature 1 is characterized in that:

[0289] After starting to spit water from the jet nozzle,

[0290] The flow rate of the washing water flowing through the upstream area is greater than the flow rate of the washing water flowing through the middle area.

[0291] The flow rate of the washing water flowing through the intermediate region is greater than the flow rate of the washing water flowing through the downstream region.

[0292] (Feature 3)

[0293] The flush toilet device according to feature 1 or 2 is characterized in that:

[0294] The maximum value of the vertical cross section perpendicular to the front-rear direction of the upstream region is larger than the maximum value of the vertical cross section perpendicular to the flow path direction of the downstream region.

[0295] (Feature 4)

[0296] The flush toilet device according to any one of features 1 to 3 is characterized in that:

[0297] During the period from when the second drain valve is opened to when the second drain valve is closed, the intermediate area is not filled with water.

[0298] (Feature 5)

[0299] The flush toilet device according to any one of features 1 to 4 is characterized in that:

[0300] The flush water tank is located above the inner edge water spout.

[0301] (Feature 6)

[0302] The flush toilet device according to any one of features 1 to 5 is characterized in that:

[0303] The flush water tank is formed integrally with the flush toilet body.

[0304] (Feature 7)

[0305] The flush toilet device according to any one of features 1 to 5 is characterized in that:

[0306] The flush water tank and the flush toilet body are formed separately.

[0307] Explanation of symbols:

[0308] 1. Water-flushing toilet device

[0309] 2. Water-washing toilet body

[0310] 2a Pelvis

[0311] 2b drainage elbow pipeline

[0312] 2c inner edge water outlet

[0313] 2D water jet

[0314] 2e inner edge waterway

[0315] 2f jet water channel

[0316] 2g top

[0317] 4 Clean water tank body

[0318] 4a Lever flush handle

[0319] 4b Drainage outlet for spitting water at the inner edge

[0320] 4c jet water drain port

[0321] 6 Water source

[0322] 8 Drain valve for inner rim (inner rim water discharge and stop switching mechanism)

[0323] 8a spherical chain

[0324] 10 Jet drain valve (jet water discharge and stop switching mechanism)

[0325] 10a valve shaft

[0326] 14 internal water tank

[0327] 14a outlet

[0328] 14b Drainage outlet forming component

[0329] 15 Overflow pipe (exhaust path)

[0330] 15a opening

[0331] 16 Float valve (water supply valve)

[0332] 16a Inflow pipe

[0333] 16b outflow tube

[0334] 18. Hydraulic drive mechanism

[0335] 18a cylinder

[0336] 18b piston

[0337] 18c spring

[0338] 20 Main body

[0339] 20a main valve body

[0340] 20b valve seat

[0341] 20c pressure chamber

[0342] 22 buoys

[0343] 24 arms

[0344] 28 strokes

[0345] 30 Clutch mechanism

[0346] 32 water supply pipe

[0347] 101 water flushing toilet device

[0348] 102 flush toilet body

[0349] 102a Pelvis

[0350] 102c drainage elbow pipeline

[0351] 102d inner edge water outlet

[0352] 102e water jet

[0353] 102f inner edge waterway

[0354] 102g jet water channel

[0355] 104 clean water tank

[0356] 104a Lever flush handle

[0357] 104b First drainage outlet

[0358] 104c Second drain outlet

[0359] 106 water source

[0360] 108 water stopper

[0361] 110 first drain valve

[0362] 110a ball chain

[0363] 110b floating ball

[0364] 112 Second drain valve

[0365] 112a valve shaft

[0366] 112b floating ball

[0367] 114 float valve (delay mechanism)

[0368] 114a Inflow pipe

[0369] 114b outflow pipe

[0370] 116 hydraulic drive mechanism

[0371] 116a cylinder

[0372] 116b piston

[0373] 116c spring

[0374] 118 Main body

[0375] 118a pressure chamber

[0376] 118b pressure channel

[0377] 120 main valve body

[0378] 120a drain hole

[0379] 122 valve seat

[0380] 124 buoys

[0381] 126 arms

[0382] 126a support shaft

[0383] 128 pilot valve

[0384] 128a pilot valve port

[0385] 130 strokes

[0386] 132 clutch mechanism

[0387] 134 water supply pipe

[0388] 140 small water tank

[0389] 140a discharge hole

[0390] 142 check valve float

[0391] 150 first float valve

[0392] 152 second float valve

[0393] 156 buoys

[0394] 158 water inlet

[0395] 161 upstream area

[0396] 162 middle area

[0397] 163 downstream area.

Claims

1. A flush toilet device that performs flushing using flush water stored in a flush water tank, characterized in that: It has: The flush toilet body comprises: a bowl; an inner edge water spouting port provided at the upper portion of the bowl; a drainage bend pipe extending from the lower portion of the bowl; and a jet water spouting port provided opposite to the inlet of the drainage bend pipe; a flush water tank body storing flush water for flushing the bowl of the flush toilet body; an inner rim water spouting and stopping switching mechanism for causing the flush water accumulated in the flush water tank body to be spouted or stopped from the inner rim water spouting port via the inner rim water conduit provided in the flush toilet body; and A jet water spouting / stopping switching mechanism is provided for spouting or stopping the flush water stored in the flush water tank body from the jet water spouting port via a jet water conduit provided in the flush toilet body. The inner edge water spouting and stopping switching mechanism and the jet water spouting and stopping switching mechanism perform a cleaning sequence including the following steps: In the first step, the washing water starts to be discharged from the inner edge water outlet; a second step of starting to discharge the washing water from the jet water spouting port after the first step while the washing water continues to be discharged from the inner rim water spouting port, thereby activating a siphon effect in the drainage trap pipe; as well as In the third step, after the second step, the spouting of the washing water from the jet water spouting port is stopped, while the spouting of the washing water from the rim water spouting port is continued.

2. The flush toilet device according to claim 1, wherein: After the water level of the accumulated water in the bowl rises due to the first step, the second step is performed.

3. The flush toilet device according to claim 2, wherein: The second step is performed after the flush water in the drain trap pipe starts to overflow.

4. The flush toilet device according to claim 2, wherein: The lengths of time for executing the first step, the second step, and the third step are different from each other.

5. The flush toilet device according to claim 4, wherein: The time required to execute the third step is longer than the time required to execute the first step and the second step.

6. The flush toilet device according to claim 5, wherein: The time taken to perform the first process is longer than the time taken to perform the second process.

7. The flush toilet device according to claim 2, wherein: In the first step, the second step, and the third step, instantaneous flow rates of the washing water spouted from the rim water spouting port are different from each other.

8. The flush toilet device according to claim 7, wherein: In the third step, the instantaneous flow rate of the washing water spouted from the rim water spouting port is lower than that in the first step and the second step.

9. The flush toilet device according to claim 1, wherein: The inner edge water spouting and stopping switching mechanism is a first drain valve that switches the spouting or stopping of the flush water from the inner edge water spouting port provided at the upper edge of the bowl portion by opening or closing the first drain port provided at the flush water tank body. The jet water spouting and stopping switching mechanism is a second drain valve provided on the main body of the water tank, which switches the spouting or stopping of the water from the jet water spouting port provided on the front side of the lower part of the bowl by opening or closing the second drain port provided on the main body of the water tank. The first drain valve and the second drain valve are driven based on different drive inputs. The jet water conduit from the second drain valve to the jet water spouting port includes: an upstream area located directly below the second drain valve; a middle region extending forward from the upstream region in a top view; The downstream area extends laterally from the front area of ​​the middle area below the accumulated water level and bypasses the lower part of the bowl and / or the drainage bend pipe to reach the jet spout. The maximum value of the vertical cross section perpendicular to the front-rear direction of the intermediate region is greater than the maximum value of the vertical cross section perpendicular to the front-rear direction of the upstream region. The maximum value of the vertical cross section perpendicular to the front-rear direction of the intermediate region is larger than the maximum value of the vertical cross section perpendicular to the flow path direction of the downstream region.

10. The flush toilet device according to claim 9, characterized in that: After starting to spit water from the jet nozzle, The flow rate of the washing water flowing through the upstream area is greater than the flow rate of the washing water flowing through the middle area. The flow rate of the washing water flowing through the intermediate region is greater than the flow rate of the washing water flowing through the downstream region.

11. The flush toilet device according to claim 10, characterized in that: The maximum value of the vertical cross section perpendicular to the front-rear direction of the upstream region is larger than the maximum value of the vertical cross section perpendicular to the flow path direction of the downstream region.

12. The flush toilet device according to claim 11, characterized in that: During the period from when the second drain valve is opened to when the second drain valve is closed, the intermediate area is not filled with water.

13. The flush toilet device according to claim 9, characterized in that: The flush water tank is located above the inner edge water spout.

14. The flush toilet device according to claim 13, characterized in that: The flush water tank is formed integrally with the flush toilet body.

15. The flush toilet device according to claim 13, characterized in that: The flush water tank and the flush toilet body are formed separately.

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