Flushing toilet device

Abstract

The present invention provides a flush toilet device that performs a large cleaning mode and a small cleaning mode with a simple structure, and can suppress the occurrence of water waste. The present invention is a flush toilet device (1) characterized by having: a flush toilet body provided with a bowl portion (2a) and a drain trap line (2e) and provided with an upper water discharge port (2d) and a lower water discharge port (2b); and a cleaning control device that controls the discharge of cleaning water from the upper water discharge port and the lower water discharge port to perform a large cleaning mode and a small cleaning mode, the cleaning control device, in the large cleaning mode and the small cleaning mode, discharging substantially the same amount of cleaning water from the lower water discharge port in order to induce a siphon phenomenon in the drain trap line, and on the other hand, controlling the discharge of water from the upper water discharge port in such a way that the water level of water accumulated in the bowl portion in the discharge of water from the lower water discharge port is different between the large cleaning mode and the small cleaning mode.

Description

TECHNICAL FIELD

[0001] The present application relates to a flush toilet device, and particularly relates to a flush toilet device capable of performing a large cleaning mode and a small cleaning mode. BACKGROUND

[0002] In Japanese Patent Application Publication No. 2020-105821 (Patent Literature 1), a drain valve device is described. The drain valve device is disposed in a water storage tank of a flush toilet, and is configured to discharge cleaning water in the water storage tank in response to an operation by a user. That is, the drain valve device is configured such that the user performs a large cleaning by pressing a large cleaning button, and performs a small cleaning by pressing a small cleaning button to discharge a smaller amount of cleaning water from the water storage tank than the large cleaning.

[0003] In Japanese Patent Application Publication No. 2016-31008 (Patent Literature 2), a flush toilet is described. The flush toilet includes a toilet body and a water supply function portion that supplies cleaning water to the toilet body. The water supply function portion includes a water storage tank and a pump, and cleaning water stored in the water storage tank is pressurized by the pump and discharged from a jet water outlet of the toilet body. On the other hand, a water supply source is directly connected to an inner edge water outlet of the toilet body, and cleaning water is discharged from the inner edge water outlet due to a water supply pressure of the water supply source.

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2020-105821

[0006] Patent Literature 2: Japanese Patent Application Publication No. 2016-31008 SUMMARY

[0007] However, in the drain valve device described in Patent Literature 1, there is a problem in that the drain valve device becomes complicated in order to perform the large cleaning mode (large cleaning) and the small cleaning mode (small cleaning). In the drain valve device described in Patent Literature 1, a cleaning operation by the user is transmitted to the drain valve by a mechanism of a plurality of connecting members and the like. That is, the drain valve device is configured such that a rotation angle or the like of the connecting members is different when the user presses the large cleaning button and when the user presses the small cleaning button, and thus the large cleaning mode and the small cleaning mode are realized by changing a lift amount of the drain valve. Therefore, in the drain valve device described in Patent Literature 1, there is a problem in that the mechanism becomes complicated in order to realize the large cleaning mode and the small cleaning mode. In addition, since the mechanism of the drain valve device becomes complicated, there is also a problem in that it is difficult to ensure reliability of operation for a long period of time.

[0008] On the other hand, although the flush toilet described in Patent Literature 2 is a toilet that performs cleaning of the bowl using cleaning water stored in a water storage tank and cleaning water directly supplied from a water supply source, it does not correspond to the two cleaning modes of the large cleaning and the small cleaning. In addition, if the amount of cleaning water from the water supply source is simply changed in order to realize the two cleaning modes of different cleaning water amounts, a problem of insufficient cleaning power or occurrence of water waste arises.

[0009] Therefore, an object of the present application is to provide a flush toilet device that can perform a large cleaning mode and a small cleaning mode with a simple structure while suppressing occurrence of water waste.

[0010] In order to solve the above problem, the present application is a flush toilet device that can perform a large cleaning mode and a small cleaning mode, characterized by comprising: a flush toilet body having a bowl portion and a drain trap line connected to a lower portion of the bowl portion, an upper water outlet provided at a position closer to an upper side than a water surface of the bowl portion, and a lower water outlet provided at a position closer to a lower side than the water surface; and a cleaning control device that controls discharge of cleaning water from the upper water outlet and the lower water outlet to perform the large cleaning mode and the small cleaning mode with a smaller amount of cleaning water than the large cleaning mode, the cleaning control device discharging substantially the same amount of cleaning water from the lower water outlet in order to induce a siphon phenomenon in the drain trap line in the large cleaning mode and the small cleaning mode, and on the other hand, controlling discharge of cleaning water from the upper water outlet in such a manner that a water level of water accumulated in the bowl portion in the discharge from the lower water outlet is different between the large cleaning mode and the small cleaning mode.

[0011] In the thus configured present application, the cleaning control device controls discharge of cleaning water from the upper water outlet closer to an upper side than a water surface of the bowl portion and from the lower water outlet closer to a lower side than the water surface, thereby performing the large cleaning mode and the small cleaning mode. Also, the cleaning control device discharges substantially the same amount of cleaning water from the lower water outlet in order to induce a siphon phenomenon in the drain trap line in the large cleaning mode and the small cleaning mode, and on the other hand, controls discharge of cleaning water from the upper water outlet in such a manner that a water level of water accumulated in the bowl portion in the discharge from the lower water outlet is different between the large cleaning mode and the small cleaning mode.

[0012] According to the present application thus configured, the cleaning control device discharges the same amount of cleaning water from the lower water discharge port in order to induce siphon phenomenon in the drain trap line in the large cleaning mode and the small cleaning mode, and thus the large cleaning mode and the small cleaning mode can be realized by a simple configuration. Further, according to the present application thus configured, the water level of the water accumulated in the basin portion in the water discharged from the lower water discharge port is made different between the large cleaning mode and the small cleaning mode by controlling the water discharged from the upper water discharge port, and thus the large cleaning mode and the small cleaning mode can be realized while suppressing waste of water.

[0013] It is preferable in the present application that the cleaning control device, when executing the large cleaning mode, makes the water flow rate of the water discharged from the upper water discharge port until the water discharged from the lower water discharge port is started to be greater than that when executing the small cleaning mode, or extends the water discharge time, thereby making the water level of the water accumulated in the basin portion at the time when the water discharged from the lower water discharge port is started to be higher in the large cleaning mode than in the small cleaning mode.

[0014] According to the present application thus configured, the water level of the water accumulated in the basin portion at the time when the water discharged from the lower water discharge port is started to be higher in the large cleaning mode than in the small cleaning mode. Therefore, in the large cleaning mode, more cleaning water can be sent into the drain trap line by the water discharged from the lower water discharge port, and even if the amount of the water discharged from the lower water discharge port is substantially the same as that in the small cleaning mode, stronger siphon phenomenon can be induced, and the cleaning power can be improved.

[0015] It is preferable in the present application that the cleaning control device starts the water discharge from the lower water discharge port before the siphon phenomenon occurs in the drain trap line.

[0016] In the present application thus configured, since the water discharge from the lower water discharge port is started before the siphon phenomenon occurs in the drain trap line, the siphon phenomenon can be induced by the water discharged from the lower water discharge port. Therefore, a larger amount of cleaning water is discharged from the upper water discharge port before the siphon phenomenon occurs, and waste of water can be suppressed.

[0017] It is preferable in the present application that the cleaning control device starts the water discharge from the lower water discharge port before the water level of the water accumulated in the basin portion reaches a stable water level at which the flow rate of the cleaning water flowing out of the drain trap line and the flow rate of the cleaning water flowing into the basin portion from the upper water discharge port become the same.

[0018] When the cleaning water flows into the tub portion from the upper water outlet, the water level in the tub portion rises, and the cleaning water in the tub portion flows out over the drain trap. The flow rate of the cleaning water flowing out over the drain trap gradually increases, and eventually becomes the same as the flow rate of the cleaning water flowing in from the upper water outlet, and in this state, the water level in the tub portion becomes a stable water level. According to the present application thus configured, since the water discharge from the lower water outlet is started before the water level in the tub portion reaches the stable water level, the amount of cleaning water discharged from the tub portion without contributing to the discharge of the dirt can be reduced, and the waste of water can be suppressed.

[0019] It is preferable in the present application that the cleaning control device, when executing the small cleaning mode, make the flow rate of the water discharge from the upper water outlet after the water discharge from the lower water outlet is started smaller than when executing the large cleaning mode, or shorten the water discharge time, thereby making the water level of the accumulated water in the tub portion after the water discharge from the lower water outlet is started higher in the large cleaning mode than in the small cleaning mode.

[0020] Generally, in a state in which the siphon phenomenon has occurred in the drain trap, if the cleaning water flows into the tub portion, the water level in the tub portion rises, and thus it is difficult for air to intrude into the drain trap, and the duration of the siphon phenomenon becomes longer. According to the present application thus configured, the water level of the accumulated water in the tub portion after the water discharge from the lower water outlet is started is higher in the large cleaning mode than in the small cleaning mode. As a result, in the large cleaning mode in which the water level of the accumulated water is higher, the duration of the siphon phenomenon is longer than in the small cleaning mode. Therefore, in the large cleaning mode and the small cleaning mode, substantially the same amount of cleaning water is discharged from the lower water outlet, and at the same time, in the large cleaning mode, the duration of the siphon phenomenon can be made longer, and the cleaning power can be improved.

[0021] It is preferable in the present application that the cleaning control device, at least in the execution of the large cleaning mode, control the water discharge from the upper water outlet so that the water level of the accumulated water in the tub portion is higher than the upper end of the inlet of the drain trap before the water discharge from the lower water outlet is started.

[0022] According to the present application thus configured, the water discharge from the upper water outlet is performed so that the water level of the accumulated water is higher than the upper end of the inlet of the drain trap before the water discharge from the lower water outlet is started, and thus the siphon phenomenon can be induced by the water discharge from the lower water outlet, and the duration of the siphon phenomenon can be made longer while the amount of cleaning water is suppressed.

[0023] It is preferable in the present application that the cleaning control device, when executing the large cleaning mode, continue the water discharge from the upper water outlet until after the water discharge for inducing the siphon phenomenon from the lower water outlet is started.

[0024] According to the present application thus configured, the water discharge from the upper water discharge port is continued from before the water discharge for inducing the siphon phenomenon is started to after the water discharge is ended. Therefore, the surface of the bowl portion can be cleaned by the water discharge from the upper water discharge port, the siphon action induced by the water discharge from the lower water discharge port can be assisted, and the bowl portion can be replenished, and the water discharge from the upper water discharge port can be effectively utilized for cleaning.

[0025] In the present application, it is preferable that the cleaning water tank body stores the cleaning water, the drain valve switches the discharge and stop of the cleaning water in the cleaning water tank body, the on-off valve switches the discharge and stop of the cleaning water supplied from the water supply source, and the cleaning control device discharges the cleaning water from the lower water discharge port by opening the drain valve and discharges the cleaning water from the upper water discharge port by opening the on-off valve.

[0026] In the present application thus configured, the cleaning control device discharges the cleaning water in the cleaning water tank body from the lower water discharge port by opening the drain valve and discharges the cleaning water supplied from the water supply source from the upper water discharge port by opening the on-off valve. According to the present application thus configured, in the large cleaning mode and the small cleaning mode, since the same amount of cleaning water is discharged from the lower water discharge port, the mechanism for opening the drain valve can be simplified. On the other hand, by controlling the on-off valve, the timing, the flow rate, and the like of the discharge of the cleaning water supplied from the water supply source can be changed relatively easily, and the large cleaning mode and the small cleaning mode can be easily implemented.

[0027] According to the water closet device of the present application, the large cleaning mode and the small cleaning mode can be implemented by a simple structure, and the occurrence of water waste can be suppressed. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 FIG. 1 is a perspective view showing the entire water closet device according to the first embodiment of the present application.

[0029] Figure 2 FIG. 2 is a cross-sectional view showing the entire water closet device according to the first embodiment of the present application.

[0030] Figure 3 FIG. 3 is a cross-sectional view showing the outline structure of the cleaning water tank device provided in the water closet device according to the first embodiment of the present application.

[0031] Figure 4 FIG. 4 is a time chart showing one example of the toilet cleaning sequence according to the first embodiment of the present application.

[0032] Figure 5is a graph schematically showing a time change of an instantaneous flow rate of cleaning water flowing through a drain trap line in a large cleaning mode and a small cleaning mode performed by the flush toilet device of the first embodiment of the present application.

[0033] Figure 6 is a time chart showing one example of a toilet cleaning sequence involved in the flush toilet device of the second embodiment of the present application.

[0034] Figure 7 is a graph schematically showing a time change of an instantaneous flow rate of cleaning water flowing through a drain trap line in a large cleaning mode and a small cleaning mode performed by the flush toilet device of the first embodiment of the present application.

[0035] Figure 8 is a graph showing an overall structure of the flush toilet device involved in the third embodiment of the present application.

[0036] Symbol explanation

[0037] 1 - flushing toilet device; 2 - flushing toilet body; 2a - bowl portion; 2b - jetted water outlet (lower water outlet); 2c - inner edge portion; 2d - inner edge water outlet (upper water outlet); 2e - drain trap line; 2f - apex of drain trap line; 2g - upper end of inlet; 4 - cleaning water tank device; 8 - lever handle; 10 - water storage tank (cleaning water tank body); 10a - drain outlet; 10b - overflow pipe; 12 - drain valve; 14 - drain valve water pressure driving portion; 14a - cylinder; 14b - piston; 14c - spring; 14d - gap; 14e - seal; 14f - through hole; 15 - rod; 15a - upper rod; 15b - lower rod; 18 - drain control valve; 18a - control valve body portion; 18b - main valve body; 18c - electromagnetic pilot valve; 18d - float pilot valve; 19 - water outlet control valve (on-off valve); 19a - water outlet valve body portion; 19b - main valve body; 19c - electromagnetic pilot valve; 20a - electromagnetic valve for drain control; 20b - electromagnetic valve for water outlet control; 22 - clutch mechanism; 23 - inflow pipe; 24 - outflow pipe; 24b - first downpipe; 24c - second downpipe; 25 - inner edge water supply pipe; 26 - drain valve float mechanism; 26a - float portion; 26b - engagement portion; 28 - controller; 30a - vacuum breaker; 30b - vacuum breaker; 32 - water supply pipe; 32a - stopcock; 32b - constant flow valve; 33 - water supply pipe branch portion; 33a - first branch pipe; 33b - second branch pipe; 34 - control valve float; 100 - flushing toilet device; 102 - flushing toilet body; 102a - bowl portion; 102b - jetted water outlet; 102c - inner edge portion; 102d - inner edge water outlet; 102e - drain trap line; 104 - cleaning water tank device; 106 - cleaning control device; 108 - remote controller; 110 - water storage tank; 112 - pressure pump; 114 - switching valve; 116 - on-off valve. DETAILED DESCRIPTION

[0038] Next, a flushing toilet device according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0039] Figure 1 is a perspective view showing the entire flushing toilet device according to the first embodiment of the present application. Figure 2 is a cross-sectional view showing the entire flushing toilet device according to the first embodiment of the present application. Figure 3 is a cross-sectional view showing the outline structure of the cleaning water tank device provided in the flushing toilet device according to the first embodiment of the present application.

[0040] As Figure 1 and Figure 2As shown, the flushing toilet device 1 according to the first embodiment of the present invention consists of a flushing toilet body 2 and a cleaning water tank device 4 disposed at its rear. In this embodiment, the flushing toilet device 1 is configured such that, after use, operation of the lever handle 8 provided on the cleaning water tank device 4 can perform a thorough or light cleaning of the basin 2a of the flushing toilet body 2. The cleaning water tank device 4 in this embodiment is configured to supply the flushing toilet body 2 with cleaning water stored inside and cleaning water supplied from the water supply source, i.e., the tap water pipe C, according to operation of the lever handle 8, thereby cleaning the basin 2a with this cleaning water.

[0041] Additionally, as a variation, the present invention can be configured to operate a remote control device (not shown) mounted on the wall to clean the basin 2a. Alternatively, the present invention can be configured to clean the basin 2a after a predetermined time has elapsed following detection of the user leaving the toilet seat by a human body sensor (not shown) located on the toilet seat. In this case, the human body sensor (not shown) can be located on the toilet seat, or at a location that can detect the user's actions of sitting down, leaving the seat, or approaching, leaving, or covering their hands, for example, it can be located on the toilet body 2 or the flushing water tank device 4. Furthermore, as long as the human body sensor (not shown) detects the user's actions of sitting down, leaving the seat, or approaching, leaving, or covering their hands, an infrared sensor or a microwave sensor can be used as the human body sensor.

[0042] Next, as Figure 2 As shown, the cleaning water tank device 4 includes: a cleaning water tank body, i.e., a water storage tank 10, for storing cleaning water to be supplied to the flush toilet body 2; a drain valve 12 for opening and closing the drain outlet 10a provided in the water storage tank 10; and a water pressure drive mechanism, i.e., a drain valve water pressure drive unit 14, for driving the drain valve 12. Furthermore, the cleaning water tank device 4 includes an opening and closing valve, i.e., a discharge control valve 19, for directly supplying cleaning water from the tap water pipe C to the flush toilet body 2.

[0043] Here, the cleaning water stored in the water tank 10 and flowing out due to the opening of the drain valve 12 is configured such that, during toilet cleaning, it is discharged from the lower water outlet, i.e., the jet outlet 2b, which is located lower than the water surface W of the basin 2a of the toilet body 2. Furthermore, the cleaning water supplied from the tap water pipe C and via the discharge control valve 19 is configured such that, during toilet cleaning, it is discharged from the upper water outlet, i.e., the inner edge water outlet 2d, located higher than the water surface W of the basin 2a and situated on the inner edge 2c of the basin 2a. Moreover, a drain bend pipe 2e is connected to the lower part of the basin 2a, and the inlet of the drain bend pipe 2e faces the jet outlet 2b. Therefore, in this embodiment, when water is discharged from the jet outlet 2b, the drain bend pipe 2e is full of water, inducing a siphon effect.

[0044] Next, refer to Figure 3 The structure of the cleaning water tank device 4 included in the flushing toilet device 1 according to the first embodiment of the present invention will be described.

[0045] Figure 3 This is a cross-sectional view showing the general structure of the flushing water tank device included in the flushing toilet device 1 according to the first embodiment of the present invention.

[0046] like Figure 3 As shown, the flushing toilet device of this embodiment includes a flushing water tank device 4, which comprises: a water storage tank 10; a drain valve 12 for opening and closing the drain outlet 10a of the water storage tank 10; and a water pressure drive mechanism, namely a drain valve water pressure drive unit 14, for driving the drain valve 12. Furthermore, the flushing water tank device 4 includes a water outlet 2d on the inner edge (… Figure 2 The system comprises a discharge control valve 19, which controls the discharge and cessation of cleaning water; a drain control valve 18, which supplies cleaning water to the drain valve water pressure drive unit 14; and a controller 28, which controls these control valves. In this embodiment, the drain valve water pressure drive unit 14 and the controller 28 function as a cleaning control device, which controls the discharge of cleaning water from the inner edge discharge port 2d and the jet discharge port 2b, and executes a large cleaning mode and a small cleaning mode with a cleaning water volume less than that of the large cleaning mode.

[0047] The water tank 10 stores water that should be supplied to the flushing toilet body 2 via the jet nozzle 2b. Figure 2The water tank, constructed to hold the flushing water, has a drain outlet 10a at its bottom for discharging stored flushing water into the toilet body 2. Additionally, an overflow pipe 10b is connected downstream of the drain outlet 10a within the water tank 10. This overflow pipe 10b extends vertically from near the drain outlet 10a to a position closer to the upper end than the stop water level L1 of the flushing water stored in the water tank 10. Thus, the flushing water flowing in from the upper end of the overflow pipe 10b bypasses the drain outlet 10a and flows directly out from the jet nozzle 2b of the toilet body 2.

[0048] The drain valve 12 is a valve body configured to open and close the drain outlet 10a. When the drain valve 12 is lifted upwards, it is opened, and the flushing water in the water tank 10 is discharged to the toilet body 2, from the basin 2a (…). Figure 2 The water jet is ejected from the lower nozzle 2b.

[0049] On the other hand, the cleaning water supplied from the tap water pipe C to the water supply pipe 32 flows into the water supply pipe branch 33 via the stop valve 32a and the flow control valve 32b. The water supply pipe branch 33 diverts the cleaning water supplied from the tap water pipe C to the first branch pipe 33a and the second branch pipe 33b. Furthermore, the first branch pipe 33a is equipped with a discharge control valve 19, and the second branch pipe 33b is equipped with a drain control valve 18. In addition, the stop valve 32a is located on the outside of the water storage tank 10, and the flow control valve 32b is connected to the water storage tank 10 downstream of it. The water supply pipe branch 33 is located downstream of the flow control valve 32b.

[0050] A stop valve 32a is provided to stop the water supply to the flushing water tank device 4 during maintenance, and is normally used in the open state. A constant flow valve 32b is provided to ensure that water supplied from the tap water pipe C flows into the water supply pipe branch 33 at a specified flow rate, so that a certain flow rate of water is supplied to the flushing water tank device 4 regardless of the installation environment of the toilet device.

[0051] On the other hand, the discharge control valve 19 installed on the first branch pipe 33a is configured to allow water supplied from the first branch pipe 33a to flow out to the inner edge water supply pipe 25. The inner edge water supply pipe 25 is connected to the inner edge discharge port 2d of the toilet body 2. Figure 2 ()( Figure 3 (Illustration omitted) The cleaning water flowing into the inner edge water supply pipe 25 is discharged from the inner edge discharge port 2d as inner edge cleaning water for cleaning the basin. In addition, a vacuum breaker 30b is installed along the inner edge water supply pipe 25. Thus, when the discharge control valve 19 side becomes negative pressure, it can prevent water from flowing back from the toilet body side to the discharge control valve 19.

[0052] The water discharge control valve 19 has a water discharge valve body 19a, a main valve body 19b disposed in the water discharge valve body 19a, and an electromagnetic pilot valve 19c. Further, the water discharge control valve 19 is connected to a water discharge control solenoid valve 20b, and the electromagnetic pilot valve 19c is moved by the water discharge control solenoid valve 20b. That is, the electromagnetic pilot valve 19c is configured to open and close a pilot valve port (not shown) provided in the water discharge valve body 19a. When the pilot valve port (not shown) is opened, the pressure in a pressure chamber provided in the water discharge valve body 19a is reduced, and the main valve body 19b of the water discharge control valve 19 is opened. Further, when the pilot valve port (not shown) is closed, the pressure in the pressure chamber is increased, and the main valve body 19b is closed. Thus, the main valve body 19b of the water discharge control valve 19 is opened and closed in accordance with the operation of the water discharge control solenoid valve 20b, and the supply of water to the inner edge water discharge port 2d (FIG. 1) is controlled. Figure 2 ) is stopped.

[0053] Next, the water discharge control valve 18 provided in the second branch pipe 33b is configured to cause the water supplied from the second branch pipe 33b to flow to the water pressure drive portion 14 of the drain valve. Further, the water discharge control valve 18 has a control valve body 18a, a main valve body 18b disposed in the control valve body 18a, an electromagnetic pilot valve 18c, and a float pilot valve 18d. Moreover, the water discharge control valve 18 is connected to a water discharge control solenoid valve 20a and a control valve float 34.

[0054] The water discharge control solenoid valve 20a is configured to move the electromagnetic pilot valve 18c built in the water discharge control valve 18 in accordance with a signal transmitted from the controller 28, and open and close a pilot valve port (not shown). When the pilot valve port (not shown) is opened, the pressure in a pressure chamber provided in the control valve body 18a is reduced, and the main valve body 18b of the water discharge control valve 18 is opened. Further, when the pilot valve port (not shown) is closed, the pressure in the pressure chamber is increased, and the main valve body 18b is closed. Thus, the main valve body 18b of the water discharge control valve 18 is opened and closed in accordance with the operation of the water discharge control solenoid valve 20a, and the supply of water to the water pressure drive portion 14 of the drain valve is controlled. Moreover, in the present embodiment, a bistable latch type solenoid valve is used as the water discharge control solenoid valve 20a, and once energized, the electromagnetic pilot valve 18c is moved, and even if the energization is stopped, the state is maintained. In this type of solenoid valve, if the energization is performed again in the opposite direction, the electromagnetic pilot valve 18c can be returned to the original position.

[0055] Further, the drain control valve 18 is connected to a control valve float 34 configured to move the float pilot valve 18d in accordance with movement of the control valve float 34. That is, the control valve float 34 is disposed in the water storage tank 10 and rises with the rise of the water level in the water storage tank 10, and moves the float pilot valve 18d by means of an arm portion 34a. When the water level in the water storage tank 10 rises to the water stop level LI, the float pilot valve 18d closes a pilot valve port (not shown) of the control valve body portion 18a.

[0056] In this way, the float pilot valve 18d is configured to control the pressure in the pressure chamber provided in the control valve body portion 18a by opening and closing the pilot valve port (not shown). As a result, when both the pilot valve port (not shown) opened by the float pilot valve 18d and the pilot valve port (not shown) opened by the electromagnetic pilot valve 18c are closed, the pressure in the pressure chamber in the control valve body portion 18a rises, and the main valve body 18b is closed.

[0057] Further, in the standby state of the cleaning water tank device 4, the water storage tank 10 is at the water stop level LI, and in this state, the pilot valve port (not shown) opened and closed by the float pilot valve 18d is closed. Thus, in the standby state, the electromagnetic pilot valve 18c is moved by the operation of the drain control electromagnetic valve 20a in accordance with the instruction signal from the controller 28, and the main valve body 18b of the drain control valve 18 is opened.

[0058] Specifically, the controller 28 receives a signal from the lever handle 8, and the controller 28 sends an electric signal to the drain control electromagnetic valve 20a to operate it and open the drain control valve 18. The drain control valve 18 controls the supply and stop of the cleaning water supplied to the drain valve hydraulic drive portion 14 in accordance with the instruction signal from the controller 28. In this embodiment, all of the cleaning water flowing out of the drain control valve 18 is supplied to the drain valve hydraulic drive portion 14 through the inflow pipe 23.

[0059] In addition, a vacuum breaker 30a is provided in the inflow pipe 23 connecting the drain control valve 18 and the drain valve hydraulic drive portion 14. When the drain control valve 18 side becomes negative pressure due to the vacuum breaker 30a, external air is drawn into the inflow pipe 23, and backflow of water from the drain valve hydraulic drive portion 14 side is prevented.

[0060] Next, the drain valve water pressure driving portion 14 is configured to drive the drain valve 12 using the water supply pressure of the cleaning water supplied from the water supply pipe C. Specifically, the drain valve water pressure driving portion 14 has a cylinder 14a into which the water supplied from the drain control valve 18 flows, a piston 14b slidably disposed inside the cylinder 14a, and a rod 15 protruding from the lower end of the cylinder 14a to drive the drain valve 12. Further, a spring 14c is disposed inside the cylinder 14a to apply a force to the piston 14b in the downward direction, and a sealing member 14e is mounted on the piston 14b to ensure water tightness between the inner wall surface of the cylinder 14a and the piston 14b.

[0061] The cylinder 14a is a cylindrical member disposed with its axis in the vertical direction and slidably receiving the piston 14b inside. In addition, an inflow pipe 23 is connected to the lower end of the cylinder 14a, and the water flowing out of the drain control valve 18 flows into the cylinder 14a. Thus, the piston 14b inside the cylinder 14a is lifted against the applied force of the spring 14c by the water flowing into the cylinder 14a.

[0062] On the other hand, an outflow hole is provided at the upper end of the cylinder 14a, and an outflow pipe 24 is connected to the inside of the cylinder 14a through the outflow hole. Thus, when water flows into the cylinder 14a from the inflow pipe 23 connected to the lower part of the cylinder 14a, the piston 14b is lifted upward from the lower part of the cylinder 14a. Thereafter, when the piston 14b is lifted to a position closer to the upper part than the outflow hole, the water that has flowed into the cylinder 14a flows out from the outflow hole through the outflow pipe 24. That is, when the piston 14b moves upward, the inflow pipe 23 and the outflow pipe 24 are connected through the inside of the cylinder 14a.

[0063] In addition, the outflow pipe 24 is branched into two pipes along the way, a first downward pipe 24b branched downward, which opens upward of the overflow pipe 10b. In addition, the other second downward pipe 24c extends substantially horizontally and then bends downward to allow water to flow into the water storage tank 10. Thus, part of the cleaning water flowing out of the cylinder 14a flows into the overflow pipe 10b, and the remaining cleaning water is stored in the water storage tank 10.

[0064] The rod 15 is a bar-shaped member connected to the lower part of the piston 14b and extends downward from the bottom surface of the cylinder 14a through a through hole 14f formed in the bottom surface. In addition, the drain valve 12 is connected to the lower end of the rod 15, and the rod 15 links the piston 14b and the drain valve 12. Thus, when water flows into the cylinder 14a and the piston 14b is lifted, the rod 15 connected to the piston 14b lifts the drain valve 12 upward, and the drain valve 12 is opened.

[0065] Further, a gap 14d is provided between the rod 15 protruding from the lower side of the cylinder 14a and the inner wall of the through-hole 14f of the cylinder 14a, and a part of the water flowing into the cylinder 14a flows out from the gap 14d. The water flowing out from the gap 14d flows into the water storage tank 10. Further, since the gap 14d is relatively narrow and the flow path resistance is large, even in the state where water flows out from the gap 14d, the pressure in the cylinder 14a rises due to the water flowing into the cylinder 14a from the inflow pipe 23, and the piston 14b is lifted against the force applied by the spring 14c.

[0066] Further, a clutch mechanism 22 is provided midway of the rod 15. The clutch mechanism 22 is configured to separate the rod 15 into an upper rod 15a and a lower rod 15b when the drain valve 12 is lifted by a predetermined distance together with the rod 15. In the state where the clutch mechanism 22 is separated, the lower rod 15b does not move in conjunction with the piston 14b and the upper portion of the upper rod 15a, and the lower rod 15b descends together with the drain valve 12 against the buoyancy and due to the gravity.

[0067] Further, a drain valve float mechanism 26 is provided in the vicinity of the drain valve 12. The drain valve float mechanism 26 is configured to delay the lowering of the lower rod 15b and the drain valve 12 to close the drain 10a after the rod 15 is lifted by a predetermined distance and the lower rod 15b is separated due to the clutch mechanism 22. Specifically, the drain valve float mechanism 26 has a float portion 26a and an engagement portion 26b that moves in conjunction with the float portion 26a.

[0068] The engagement portion 26b is configured to engage with the lowered lower rod 15b separated by the clutch mechanism 22, and to prevent the lowering of the lower rod 15b and the drain valve 12 to be positioned at the drain 10a. Next, the float portion 26a also lowers together with the lowering of the water level in the water storage tank 10, and when the water level in the water storage tank 10 lowers to a predetermined water level, the float portion 26a rotates the engagement portion 26b, and the engagement of the engagement portion 26b with the lower rod 15b is released. Due to the release of the engagement, the lower rod 15b and the drain valve 12 lower to be positioned at the drain 10a. Thus, the closing of the drain valve 12 is delayed, and an appropriate amount of cleaning water is discharged from the drain 10a.

[0069] The controller 28 is configured to have a circuit board built therein, and to control the drain control solenoid valve 20a, the water discharge control solenoid valve 20b, and the like in accordance with the operation of the lever handle 8. The circuit board is provided with a microprocessor, a memory, an interface circuit, and the like, and these are operated by software for controlling the toilet cleaning.

[0070] Next, the operation of the toilet device 1 according to the first embodiment of the present application will be described with reference to Figure 4 and Figure 5 The operation of the toilet device 1 according to the first embodiment of the present application will be described.

[0071] Figure 4 This is a timeline diagram illustrating an example of the toilet cleaning sequence according to the first embodiment of the flushing toilet device of the present invention. The upper column shows the toilet cleaning in the small cleaning mode, and the lower column shows the toilet cleaning in the large cleaning mode. In addition, the upper section of each column shows the water flow rate from the inner edge nozzle, the middle section shows the water flow rate from the jet nozzle, and the lower section shows the water level in the basin. Figure 5 It is a graph that represents the instantaneous flow rate of cleaning water flowing through the drain bend in the large cleaning mode and the small cleaning mode, and is a time-varying representation of the change in the instantaneous flow rate of the cleaning water.

[0072] First, the execution Figure 4 The toilet cleaning sequence for the small cleaning mode shown in the upper column is explained.

[0073] exist Figure 4 The moment t S0 In the standby state of the toilet flushing system, the water level in the water storage tank 10 is the stop water level L1, and no power is supplied to the drain control solenoid valve 20a or the discharge control solenoid valve 20b. In this state, the pilot valve ports (not shown) opened and closed by the solenoid pilot valve 19c, the solenoid pilot valve 18c (not shown), and the float pilot valve 18d (not shown) are all closed. Therefore, the main valve body 18b of the drain control valve 18 and the main valve body 19b of the discharge control valve 19 are in the closed state.

[0074] Next, if in Figure 4 The moment t S1 When the user operates the lever handle 8 to perform a quick wash, a signal indicating the quick wash mode is sent to the controller 28. Figure 3 When a toilet cleaning instruction signal is received, the controller 28 energizes the solenoid valve 20b for dispensing water control, opening the solenoid pilot valve 19c of the dispensing water control valve 19. This reduces the pressure in the pressure chamber of the dispensing water control valve 19, causing the main valve body 19b to move away from the valve seat and open. Furthermore, in this embodiment, since a bistable latching solenoid valve is used as the dispensing water control solenoid valve 20b, the open state is maintained even after energization is stopped once the solenoid pilot valve 19c is opened.

[0075] If the flush control valve 19 is opened, tap water supplied from the water supply pipe 32 via the water supply pipe branch 33 and the first branch pipe 33a flows through the flush control valve 19 and into the inner edge water supply pipe 25. The flushing water flowing into the inner edge water supply pipe 25 exits from the inner edge flush outlet 2d of the toilet body. Figure 2The cleaning water discharged from the inner edge outlet 2d flows down while swirling within the basin 2a, cleaning the dirt-receiving surface of the basin 2a. The water discharged from this inner edge outlet 2d is performed as "front inner edge" water discharge before the water discharge from the jet outlet 2b begins. In this way, by performing "front inner edge" water discharge, as... Figure 4 As shown in the lower section of the upper column, the water level in basin 2a changes from time t. S1 It has begun to rise.

[0076] After energizing the solenoid valve 20b for water discharge control, at time t after a specified time... S2 The controller 28 energizes the drain control solenoid valve 20a, causing the solenoid pilot valve 18c to leave the pilot valve port (not shown). This reduces the pressure in the pressure chamber of the drain control valve 18, causing the main valve body 18b to leave the valve seat and open. In other words, after opening the discharge control valve 19, the controller 28 opens the drain control valve 18 while maintaining the open state of the discharge control valve 19. Furthermore, in this embodiment, since a bistable latching solenoid valve is used as the drain control solenoid valve 20a, the open state is maintained even after energizing the solenoid pilot valve 18c is stopped once it is opened.

[0077] As described above, the cleaning water flowing from the drain control valve 18 flows through the inlet pipe 23 into the cylinder 14a of the drain valve water pressure drive unit 14 and flows out through the outlet pipe 24. Additionally, a portion of the water flowing into the cylinder 14a from the inlet pipe 23 flows out through the gap 14d between the inner wall of the through hole 14f of the cylinder 14a and the rod 15, and this water flows into the water storage tank 10. On the other hand, a portion of the cleaning water flowing out through the outlet pipe 24 flows into the overflow pipe 10b, while the remaining cleaning water flows into the water storage tank 10. That is, a portion of the cleaning water flowing from the drain valve water pressure drive unit 14 flows into the water storage tank 10, and the remaining cleaning water flowing into the overflow pipe 10b bypasses the drain valve 12 and flows into the toilet body from the jet nozzle 2b.

[0078] On the other hand, the cleaning water flowing from the inlet pipe 23 into the cylinder 14a of the drain valve water pressure drive unit 14 lifts the piston 14b. As a result, the rod 15 connected to the piston 14b and the drain valve 12 are also lifted, and the drain outlet 10a is opened. Thus, the cleaning water stored in the water tank 10 flows out through the drain outlet 10a. As a "jet discharge," water is discharged from the jet outlet 2b located at the lower part of the basin 2a. Figure 2 The cleaning water discharged from the spray nozzle 2b fills the drain bend pipe 2e extending from the lower part of the basin 2a with water, inducing a siphon effect. Through the siphon effect, the accumulated water and sewage in the basin 2a are discharged through the drain bend pipe 2e.

[0079] likeFigure 4 As shown in the lower segment of the upper column of FIG. 10, when the water level in the water tank 10 drops due to the discharge of the cleaning water, the control valve float 34 is lowered. Thus, at time t S2 The water level in the basin portion 2a sharply rises due to the start of the jetting of the cleaning water. Next, when the siphon phenomenon occurs in the drain trap line 2e, the water in the basin portion 2a is introduced into the drain trap line 2e due to the negative pressure and flows through the drain trap line 2e to be discharged, so the water level in the basin portion 2a sharply drops. Also, even during the period in which the cleaning water is being discharged from the jetting spout 2b, the spouting from the inner edge spout 2d continues as "middle-inner edge" spouting.

[0080] On the other hand, when the piston 14b in the drain valve water pressure drive portion 14 is lifted and the rod 15 and the drain valve 12 are lifted to the prescribed position in conjunction therewith, the clutch mechanism 22 separates the lower rod 15b and the drain valve 12 from the upper rod 15a. Thus, during the opening of the drain control valve 18, the upper rod 15a continues to be held in a state in which it is lifted upward together with the piston 14b, while the lower rod 15b and the drain valve 12 drop due to the weight thereof. However, the separated lower rod 15b is engaged with the engagement portion 26b of the drain valve float mechanism 26, and the drop of the lower rod 15b and the drain valve 12 is prevented. Thus, even after the clutch mechanism 22 is separated, the drain port 10a of the water storage tank 10 continues to be held in a state in which it is open, and the spouting from the jetting spout 2b continues.

[0081] As described above, a portion of the cleaning water that flows out from the drain valve water pressure drive portion 14 flows into the water storage tank 10. However, the flow rate of the cleaning water that flows into the water storage tank 10 through the flow-out pipe 24 is smaller than the flow rate of the cleaning water that is discharged from the drain port 10a due to the opening of the drain valve 12, so the water level in the water storage tank 10 drops in this state.

[0082] Next, when the water level in the water storage tank 10 drops due to the discharge of the cleaning water in the water storage tank 10, the control valve float 34 is lowered. Thus, at time t S2 After the drain valve 12 is opened, the arm portion 34a is rotated, the float pilot valve 18d is separated from the pilot valve port (not shown), and the pilot valve port (not shown) is opened.

[0083] Also, after the float pilot valve 18d is opened, the controller 28 sends a control signal again to the drain control solenoid valve 20a, and the solenoid pilot valve 18c is closed. However, at this time, since the float pilot valve 18d has already been opened, the pressure in the pressure chamber of the drain control valve 18 does not rise, and the drain control valve 18 is maintained in an open state.

[0084] Next, when the water level in the water storage tank 10 drops to a predetermined level as a result of the washing water in the water storage tank 10 being discharged from the drain port 10a, the float portion 26a of the drain valve float mechanism 26 drops, which causes the engagement portion 26b to move. As a result, the engagement of the lower lever 15b with the engagement portion 26b is released, and the lower lever 15b and the drain valve 12 again start to drop. After that, at time t S3 , the drain port 10a of the water storage tank 10 is closed by the drain valve 12, and the discharge of washing water from the jet discharge port 2b is stopped. At time t S3 , if the discharge from the jet discharge port 2b is stopped, the siphon phenomenon in the drain trap line 2e ends after that. By the end of the siphon phenomenon, the discharge of the accumulated water in the tub portion 2a from the drain trap line 2e also stops.

[0085] On the other hand, even after the jet discharge ends, the discharge from the inner edge discharge port 2d as "rear inner edge" discharge continues, and the washing water discharged from the inner edge discharge port 2d flows into the tub portion 2a and is used as make-up water. Therefore, as shown in the lower section of the left column of Figure 4 , after the drain valve 12 is closed, the water level of the accumulated water in the tub portion 2a slowly rises after the siphon phenomenon ends.

[0086] Further, at time t S1 after the discharge control valve 18 is opened, at time t S4 when a predetermined time elapses, the controller 28 sends a control signal to the discharge control solenoid valve 20b to close the solenoid pilot valve 19c. As a result, the discharge control valve 18 is closed, and the discharge of washing water from the inner edge discharge port 2d is stopped.

[0087] Further, even after the discharge from the inner edge discharge port 2d is stopped, the discharge control valve 18 is in the open state, and therefore the water supplied from the water supply pipe 32 flows through the cylinder 14a of the drain valve water pressure drive portion 14 into the water storage tank 10 and the overflow pipe 10b. Thus, even after the drain port 10a is closed, the washing water that has flowed into the overflow pipe 10b flows through the jet discharge port 2b into the tub portion 2a, and the washing water that flows in is used as make-up water (and because the washing water that flows through the overflow pipe 10b and is discharged from the jet discharge port 2b is a small flow, the details are omitted in Figure 4 ). As a result, even after the discharge from the inner edge discharge port 2d is stopped, the water level of the accumulated water in the tub portion 2a slowly rises. On the other hand, even in the water storage tank 10, the washing water that flows through the drain valve water pressure drive portion 14 flows in, and therefore the water level in the water storage tank 10 rises.

[0088] Next, at time t S5When the water level in the water storage tank 10 rises to the specified stop water level L1, the control valve float 34 rises, causing the float pilot valve 18d to move via the arm 34a, closing the pilot valve port. Thus, with both the electromagnetic pilot valve 18c and the float pilot valve 18d closed, the pressure in the pressure chamber of the control valve body 18a rises, closing the main valve body 18b, and the drain control valve 18 is in the closed state. At this time, the water level in the basin 2a returns to the standby state (time t). S0 The water level below ) is thus lowered. As a result, the water supply to the water storage tank 10 is stopped.

[0089] On the other hand, when the water supply to the drain valve water pressure drive unit 14 is stopped due to the closure of the drain control valve 18, the piston 14b of the drain valve water pressure drive unit 14 is pressed down by the force applied by the spring 14c. When the upper rod 15a is pressed down together with the piston 14b, the upper rod 15a and the lower rod 15b, which were separated by the clutch mechanism 22, are reconnected. Therefore, when performing the next toilet flush, the upper rod 15a and the lower rod 15b are lifted together by the piston 14b. Thus, the toilet flush based on the small flush mode ends, and the flushing device returns to the toilet flushing standby state.

[0090] Next, the execution Figure 4 The bottom column shows the toilet cleaning sequence for the deep cleaning mode.

[0091] exist Figure 4 The time in the lower column t L0 The standby state for toilet cleaning is the same as the small cleaning mode mentioned above.

[0092] Next, at time t L1 If the user operates the lever handle 8 to perform a deep cleaning, a signal indicating the deep cleaning mode is sent to the controller 28. The controller 28 energizes the water discharge control solenoid valve 20b, opening the water discharge control valve 19 and initiating water discharge from the inner edge water discharge port 2d. The control of this water discharge control valve 19 is the same as that described in the small cleaning mode.

[0093] Moreover, at time t L2 The controller 28 energizes the drain control solenoid valve 20a, opening the drain control valve 18. As described above, if the drain control valve 18 is opened, the drain valve water pressure drive unit 14 operates, and the drain valve 12 of the water storage tank 10 is opened. Therefore, at time t... L2 Water begins to be discharged from the jet nozzle 2b. Opening the drain valve 12 has the same effect as in the small cleaning mode described above. However, at time t... L1 After water discharge from the inner edge vent 2d begins, at time t L2The time until drain valve 12 is opened is longer in the large cleaning mode than in the small cleaning mode. That is, the time t in the large cleaning mode... L1 With time t L2 The time between them is longer than the time t in the small cleaning mode. S1 With time t S2 The time between.

[0094] Here, the flow rate (L / min) of the cleaning water discharged from the inner edge outlet 2d is the same as in the small cleaning mode, even in the large cleaning mode. However, the discharge time of the water from the inner edge outlet 2d before the discharge from the jet outlet 2b begins is longer in the large cleaning mode than in the small cleaning mode. Therefore, the water level in the basin 2a at the moment the discharge from the jet outlet 2b begins is higher in the large cleaning mode than in the small cleaning mode. That is, the water level L at the beginning of the jet discharge in the large cleaning mode is higher. L The water level L is higher than the water level when the spraying begins in the small cleaning mode. S In this embodiment, the water level in the basin 2a of the water discharged from the jet nozzle 2b is controlled to be different in the large cleaning mode than in the small cleaning mode.

[0095] In this embodiment, the inner edge water discharge period before the start of water jetting is longer in the large-scale cleaning mode than in the small-scale cleaning mode, resulting in a higher water level at the start of water jetting in the large-scale cleaning mode compared to the small-scale cleaning mode. Conversely, as a variation, the invention can also be configured such that the flow rate of the inner edge water jetting before the start of water jetting is greater in the large-scale cleaning mode than in the small-scale cleaning mode, thereby resulting in a higher water level at the start of water jetting in the large-scale cleaning mode compared to the small-scale cleaning mode.

[0096] Furthermore, in this embodiment, the flow rate (L / min) of the cleaning water discharged from the inner edge outlet 2d is relatively small. Therefore, water is discharged from the jet outlet 2b before a siphon phenomenon occurs in the drain bend pipe 2e, thereby inducing a siphon phenomenon through the water discharge from the jet outlet 2b. That is, water is discharged from the jet outlet 2b before a siphon phenomenon occurs in the drain bend pipe 2e.

[0097] In addition, if the water level in the tub section 2a rises as the cleaning water is discharged from the inner edge water discharge port 2d, the accumulated water in the tub section 2a is discharged from the drain trap line 2e over the top 2f of the drain trap line 2e (in this state, the siphon phenomenon does not occur). The flow rate over the top 2f of the drain trap line 2e increases little by little after the discharge of the cleaning water from the inner edge water discharge port 2d is started, and the flow rate of the cleaning water flowing in from the inner edge water discharge port 2d eventually becomes the same as the flow rate of the cleaning water flowing out over the top 2f of the drain trap line 2e. In this state, the water level of the accumulated water in the tub section 2a becomes constant even during the discharge of the cleaning water from the inner edge water discharge port 2d, and becomes a stable water level. In the present embodiment, the discharge of the cleaning water from the jet water discharge port 2b is started before the accumulated water in the tub section 2a reaches the stable water level, and the siphon phenomenon occurs in the drain trap line 2e.

[0098] Furthermore, the higher the water level of the accumulated water in the tub section 2a at the time when the siphon phenomenon occurs in the drain trap line 2e, the higher the siphon force by which the dirt and the accumulated water in the tub section 2a are discharged through the drain trap line 2e. That is, the higher the water level of the accumulated water in the tub section 2a at the time when the siphon phenomenon occurs, compared with the height of the top 2f of the drain trap line 2e, the stronger the force by which the accumulated water is pressed into the drain trap line 2e by the head pressure, and the larger the siphon force. In addition, the higher the water level of the accumulated water at the time when the siphon phenomenon occurs, the more the amount of the cleaning water that is sucked into the drain trap line 2e due to the occurrence of the siphon phenomenon, and the more powerfully the dirt in the tub section 2a can be discharged. Figure 2 ) of the drain trap line 2e, the stronger the force by which the accumulated water is pressed into the drain trap line 2e by the head pressure, and the larger the siphon force. In addition, the higher the water level of the accumulated water at the time when the siphon phenomenon occurs, the more the amount of the cleaning water that is sucked into the drain trap line 2e due to the occurrence of the siphon phenomenon, and the more powerfully the dirt in the tub section 2a can be discharged.

[0099] In the present embodiment, the discharge of the cleaning water from the jet water discharge port 2b is started, and the water level of the accumulated water at the time when the siphon phenomenon occurs in the drain trap line 2e is higher in the large cleaning mode than in the small cleaning mode. Therefore, as shown in FIG. 6, the maximum value of the instantaneous flow rate of the cleaning water flowing through the drain trap line 2e is larger in the large cleaning mode than in the small cleaning mode. As a result, in the present embodiment, the siphon force is larger in the large cleaning mode than in the small cleaning mode, and the dirt and the accumulated water in the tub section 2a can be more powerfully discharged through the drain trap line 2e. Figure 5

[0100] Furthermore, at the time t Figure 4 when the siphon phenomenon occurs in the drain trap line 2e, the higher the water level of the accumulated water in the tub section 2a, the higher the siphon force by which the dirt and the accumulated water in the tub section 2a are discharged through the drain trap line 2e. That is, the higher the water level of the accumulated water in the tub section 2a at the time when the siphon phenomenon occurs, compared with the height of the top 2f of the drain trap line 2e, the stronger the force by which the accumulated water is pressed into the drain trap line 2e by the head pressure, and the larger the siphon force. In addition, the higher the water level of the accumulated water at the time when the siphon phenomenon occurs, the more the amount of the cleaning water that is sucked into the drain trap line 2e due to the occurrence of the siphon phenomenon, and the more powerfully the dirt in the tub section 2a can be discharged. L2 After the discharge of the cleaning water from the jet water discharge port 2b is started, the drain valve 12 is closed at the time t L3 when the jet water discharge from the jet water discharge port 2b is completed. At this point, the drain control valve 18 is opened, and the drain valve water pressure driving section 14 is operated to raise the drain valve 12, whereby the jet water discharge from the jet water discharge port 2b is performed. This is the same in the large cleaning mode and in the small cleaning mode. Thus, the time t L2 when the drain valve 12 is opened in the large cleaning mode is later than the time t L3 ​The period is roughly the same as the time t when drain valve 12 is opened in the small cleaning mode. S2 ~time t S3 During this period. Therefore, in both the large cleaning mode and the small cleaning mode, in order to induce a siphon effect in the drain bend pipe 2e, the same amount (same volume) of cleaning water is essentially discharged from the spray nozzle 2b.

[0101] Furthermore, since the water pressure supplied to the water tank device 4 via the tap water pipe C is not always constant, the amount of cleaning water discharged from the spray nozzle 2b varies in each cleaning cycle and between the large and small cleaning modes. However, since the water discharge from the spray nozzle 2b is executed with the same control by the same cleaning control device (drain valve water pressure drive unit 14, controller 28), the same amount of cleaning water can be discharged from the spray nozzle 2b in both the large and small cleaning modes. Thus, in this embodiment, the same amount of cleaning water is discharged from the spray nozzle 2b in both the large and small cleaning modes, while the water level in the discharged water from the spray nozzle 2b is different, thereby executing the large and small cleaning modes.

[0102] Next, in Figure 4 The moment t L4 Controller 28 closes the water discharge control valve 19, ending the water discharge from the inner edge discharge port 2d. Furthermore, at time t... L5 When the water level in the water storage tank 10 rises to the specified stop water level L1, the control valve float 34 rises, and the drain control valve 18 is closed. At this time, the water level in the basin 2a returns to the standby state (time t). L0 When the water level drops below a certain threshold, the water supply to the water storage tank 10 is stopped. Thus, the toilet cleaning cycle based on the large cleaning mode ends, and the toilet flushing device returns to the toilet cleaning standby state.

[0103] In this large-scale cleaning mode, at time t L2 After drain valve 12 is opened, at time t L4 The period from when the water discharge from the inner edge outlet 2d ends is the same as the time t in the small cleaning mode. S2 ~time t S4 During this period. Additionally, during the large cleaning mode, water is discharged from the inner edge outlet 2d for a period t. L1 ~t L4 The duration of water discharge from the inner edge nozzle during the small cleaning mode is longer than 2d. S1 ~t S4 Therefore, the amount (volume) of cleaning water discharged from the inner edge outlet 2d is greater in the large cleaning mode than in the small cleaning mode. On the other hand, the period t during which the drain control valve 18 is open in the large cleaning mode...L2 ~t L5 , the same as the period t during which the drain control valve 18 is opened in the small cleaning mode S2 ~t S5 The amount of cleaning water discharged from the jet discharge port 2b is also substantially the same. Therefore, the total amount of cleaning water used in the large cleaning mode (the volume of the entire cleaning water discharged from the inner edge discharge port 2d and the jet discharge port 2b), is more than the total amount of cleaning water used in the small cleaning mode.

[0104] The flush toilet device 1 according to the first embodiment of the present application, in the large cleaning mode and the small cleaning mode, in order to induce the siphon phenomenon in the drain bend pipe 2e, the cleaning control device, i.e., the drain valve water pressure driving portion 14 and the controller 28, substantially discharge the same amount of cleaning water from the jet discharge port 2b, and therefore the large cleaning mode and the small cleaning mode can be realized by a simple structure. In addition, according to the present embodiment, the discharge from the inner edge discharge port 2d is controlled so that the water level of the accumulated water in the basin portion 2a in the discharge from the jet discharge port 2b is different between the large cleaning mode and the small cleaning mode, and therefore the large cleaning mode and the small cleaning mode can be realized while suppressing waste of water.

[0105] In addition, the flush toilet device 1 according to the present embodiment, at the time when the discharge from the jet discharge port 2b is started, the water level of the accumulated water in the basin portion 2a is higher in the large cleaning mode than in the small cleaning mode. Therefore, in the large cleaning mode, by the discharge from the jet discharge port 2b, more cleaning water can be sent into the drain bend pipe 2e, and even if the amount of the discharge from the jet discharge port 2b for inducing the siphon phenomenon is substantially the same as in the small cleaning mode, a stronger siphon phenomenon can be induced, and the cleaning power can be improved.

[0106] Further, the flush toilet device 1 according to the present embodiment, since the discharge from the jet discharge port 2b is started before the siphon phenomenon occurs in the drain bend pipe 2e, the siphon phenomenon can be induced by the discharge from the jet discharge port 2b. Therefore, a larger amount of cleaning water is discharged from the inner edge discharge port 2d before the siphon phenomenon occurs, and waste of water can be suppressed.

[0107] In addition, the flush toilet device 1 according to the present embodiment, since the discharge from the jet discharge port 2b is started before the water level in the basin portion 2a reaches the stable water level, the amount of cleaning water discharged from the basin portion 2a without contributing much to the discharge of the dirt can be reduced, and waste of water can be suppressed.

[0108] Further, according to the flush toilet device 1 of the present embodiment, since the same amount of flush water is discharged from the jetted water discharge port 2b in the large flush mode and the small flush mode, it is possible to simplify the mechanism for opening the drain valve 12. On the other hand, by the control of the water discharge control valve 19, it is possible to comparatively easily change the discharge timing, flow rate, and the like of the flush water supplied from the water supply source, i.e., the water pipe, and it is possible to easily realize the large flush mode and the small flush mode.

[0109] Next, the flush toilet device according to the second embodiment of the present application will be described with reference to Figure 6 and Figure 7 The flush toilet device according to the second embodiment of the present application will be described.

[0110] The flush toilet device according to the present embodiment is different from the above-described first embodiment only in the control performed by the controller 28. Therefore, only the part of the second embodiment of the present application that is different from the first embodiment will be described below, and the description of the same structure, function, and effect will be omitted.

[0111] Figure 6 is a time chart showing one example of the toilet cleaning sequence of the flush toilet device according to the second embodiment of the present application, and the toilet cleaning in the small flush mode is shown in the upper column, and the toilet cleaning in the large flush mode is shown in the lower column. In addition, the water discharge amount from the inner edge water discharge port is shown in the upper section of each column, the water discharge amount from the jetted water discharge port is shown in the middle section, and the water level of the accumulated water in the bowl portion is shown in the lower section. Figure 7 is a chart that schematically shows the time change of the instantaneous flow rate of the flush water flowing through the drain trap line in the large flush mode and the small flush mode.

[0112] First, the toilet cleaning sequence when the small flush mode shown in the upper column of Figure 6 is performed by the flush toilet device according to the second embodiment of the present application will be described.

[0113] In the toilet cleaning standby state at time t S10 of the upper column of Figure 6 , the same as the first embodiment described above.

[0114] Next, at time t S11 , if the user operates the lever handle 8 Figure 1 for the small flush, a signal for instructing the execution of the small flush mode is sent to the controller 28. The controller 28 energizes the water discharge control solenoid valve 20b to open the water discharge control valve 19, and starts the water discharge from the inner edge water discharge port 2d. The control of this water discharge control valve 19 is the same as that of the first embodiment described above. Thus, the water level of the accumulated water in the bowl portion 2a gradually rises.

[0115] Moreover, at time t S12 The controller 28 energizes the drain control solenoid valve 20a, thereby opening the drain control valve 18. If the drain control valve 18 is opened, the drain valve water pressure drive unit 14 operates, and the drain valve 12 of the water storage tank 10 is opened. Thus, at time t... S12 In order to induce a siphon effect within the drain bend 2e, water is started to flow from the jet nozzle 2b. Opening the drain valve 12 serves the same purpose as in the first embodiment described above.

[0116] The drain valve 12 is opened, allowing a large flow of water to be discharged from the jet nozzle 2b. This induces a siphon effect in the drain bend pipe 2e, causing the accumulated water and waste in the basin 2a to be discharged through the drain bend pipe 2e. As a result, the water level in the basin 2a decreases.

[0117] Next, at time t S12 At time t after opening drain control valve 18 and thus opening drain valve 12, and before closing drain valve 12. S13 The controller 28 stops the water discharge from the inner edge discharge port 2d. That is, after the drain valve 12 is opened, the controller 28 sends a signal to the discharge control solenoid valve 20b to close the discharge control valve 19 and stop the water discharge from the inner edge discharge port 2d before it is closed.

[0118] After that, at time t S14 The drain valve 12 is located at the drain outlet 10a and is closed, thus ending the discharge of water from the jet outlet 2b that induces the siphon phenomenon. The function of closing the drain valve 12 is the same as in the first embodiment.

[0119] Furthermore, similar to the first embodiment described above, even after the drain valve 12 is closed, the drain control valve 18 remains open, thus allowing water to flow from the water supply pipe 32 ( Figure 3 The supplied tap water flows through the outflow pipe 24 and into the water storage tank 10 and the overflow pipe 10b respectively.

[0120] The cleaning water flowing into the overflow pipe 10b is replenished by flowing through the spray nozzle 2b into the basin 2a, so the water level in the basin 2a rises even after the drain valve 12 is closed. Additionally, the cleaning water flowing into the water storage tank 10 causes the water level in the tank to rise. Figure 6 The moment t S15 When the water level in the water storage tank 10 rises to the specified stop water level L1, the control valve float 34 rises, and the drain control valve 18 is closed. At this time, the water level in the basin 2a returns to the standby state (time t). S10When the water level drops below a certain level, the water supply to the water storage tank 10 is stopped. Thus, the toilet cleaning cycle based on the small cleaning mode ends, and the toilet flushing device returns to the toilet cleaning standby state.

[0121] Next, the execution Figure 6 The bottom column shows the toilet cleaning sequence for the deep cleaning mode.

[0122] exist Figure 6 The time in the lower column t L10 The standby state of the toilet cleaning function is the same as that in the small cleaning mode.

[0123] Next, at time t L11 If the user operates the lever handle 8 to perform a deep clean, a signal indicating the deep clean mode is sent to the controller 28. The controller 28 energizes the water discharge control solenoid valve 20b, opening the water discharge control valve 19 and initiating water discharge from the inner edge water outlet 2d. The control of this water discharge control valve 19 is the same as in the small clean mode. As a result, the water level in the basin 2a gradually rises.

[0124] Moreover, at time t L12 The controller 28 energizes the solenoid valve 20a for drainage control, opening the drainage control valve 18. If the drainage control valve 18 is opened, the water pressure drive unit 14 of the drainage valve operates, opening the drainage valve 12 of the water storage tank 10. Thus, at time t... L12 The system begins discharging water from the jet nozzle 2b to induce a siphon effect. Opening the drain valve 12 has the same effect as in the small cleaning mode. Furthermore, even in this embodiment, no siphon effect occurs in the drain bend 2e before the water discharge from the jet nozzle 2b begins.

[0125] The drain valve 12 is opened, allowing a large flow of water to be discharged from the jet nozzle 2b. This induces a siphon effect in the drain bend 2e, causing the accumulated water and waste in the basin 2a to be discharged through the drain bend 2e. In this embodiment, the period t from the start of inner edge discharge to the start of jet discharge is... L11 ~t L12 The same as the period t in the small cleaning mode S11 ~t S12 Therefore, in this embodiment, the water level in the basin 2a at the moment when water is discharged from the jet nozzle 2b is controlled to be substantially the same in the large cleaning mode and the small cleaning mode.

[0126] On the other hand, in the small cleaning mode, at time t S12 After opening drain control valve 18 and drain valve 12, at time t before drain valve 12 is closed.S13 , the controller 28 stops the water discharge from the inner edge water discharge port 2d. In contrast to this, in the large cleaning mode, the water discharge from the inner edge water discharge port 2d is continued after the drain valve 12 is closed (time t L13 ) until the time t Figure 2 ) until the time t

[0127] That is, as shown in Figure 7 , in the present embodiment, since the water level in the basin portion 2a at the time when the jet water discharge is started is the same in the large cleaning mode as in the small cleaning mode, the maximum value of the instantaneous flow rate of the cleaning water flowing in the drain trap pipe 2e is substantially the same in the large cleaning mode as in the small cleaning mode. However, in the jet water discharge in the small cleaning mode (period t S12 ~ t S14 ), the inner edge water discharge is stopped, in contrast to this, in the large cleaning mode, the inner edge water discharge is continued, and therefore the water level of the accumulated water after the siphon phenomenon is induced is maintained higher in the large cleaning mode than in the small cleaning mode. As a result, the siphon phenomenon in the drain trap pipe 2e continues for a longer period.

[0128] As such, in the present embodiment, the water discharge from the inner edge water discharge port 2d is controlled so that the water level of the accumulated water in the basin portion 2a in the water discharge from the jet water discharge port 2b is different in the large cleaning mode from in the small cleaning mode. That is, the water discharge from the inner edge water discharge port 2d is controlled so that the water level of the accumulated water in the basin portion 2a after the water discharge from the jet water discharge port 2b is started is higher in the large cleaning mode than in the small cleaning mode. Therefore, as shown in Figure 7 , the time during which the cleaning water flows in the drain trap pipe 2e at a large flow rate is longer in the large cleaning mode than in the small cleaning mode. Thus, in the large cleaning mode, a more powerful cleaning force can be obtained as compared with the small cleaning mode.

[0129] In this embodiment, the period during which the inner edge water discharge is performed in the jet water discharge is shorter in the small cleaning mode than in the large cleaning mode, and thus the water level after the jet water discharge is started is higher in the large cleaning mode than in the small cleaning mode. In contrast, as a modification, the present application can be configured such that the flow rate of the inner edge water discharge in the jet water discharge is higher in the large cleaning mode than in the small cleaning mode, and thus the water level after the jet water discharge is started is higher in the large cleaning mode than in the small cleaning mode. In addition, in the small cleaning mode, although the inner edge water discharge is stopped in the jet water discharge, the present application can be configured such that the inner edge water discharge is gradually reduced in the jet water discharge.

[0130] Furthermore, in the large cleaning mode, the period during which the inner edge water discharge is performed in the jet water discharge is longer than in the small cleaning mode, and thus the water level after the jet water discharge is started is higher in the large cleaning mode than in the small cleaning mode. Figure 6 At the time t L13 , the drain valve 12 is closed at the drain port 10a, and the water discharge from the jet water discharge port 2b for inducing the siphon phenomenon is ended. At this time, in the large cleaning mode, the period t L12 ~ t L13 during which the drain valve 12 is closed after being opened is substantially the same as the period t S12 ~ t S14 in the small cleaning mode. Therefore, the amount (volume) of the cleaning water discharged from the jet water discharge port 2b for inducing the siphon phenomenon in the drain trap 2e is substantially the same in the small cleaning mode as in the large cleaning mode.

[0131] Next, at the time t L14 after the drain valve 12 is closed, the controller 28 closes the water discharge control valve 19, and the water discharge from the inner edge water discharge port 2d is stopped. In this way, in the large cleaning mode, the water discharge from the inner edge water discharge port 2d is continued from before the water discharge from the jet water discharge port 2b for inducing the siphon phenomenon is started until the water discharge is ended.

[0132] Furthermore, even after the drain valve 12 is closed, the drain control valve 18 continues to be maintained in the opened state, and thus the tap water supplied from the water supply pipe 32 Figure 3 flows through the outflow pipe 24 and flows into the water storage tub 10 and the overflow pipe 10b, respectively. The cleaning water flowing into the water storage tub 10 is stored in the water storage tub 10, and the cleaning water flowing into the overflow pipe 10b flows through the jet water discharge port 2b and flows into the tub 2a for replenishing the tub 2a.

[0133] Next, at the time t L15 when the water level in the water storage tub 10 rises to the predetermined water stop level LI, the control valve float 34 rises, and the drain control valve 18 is in the closed state. At this time, the water level of the accumulated water in the tub 2a returns to the standby state (time t L10The water level in the basin 2a after the start of the discharge from the jet discharge port 2b is higher in the large cleaning mode than in the small cleaning mode. As a result, the duration of the siphon phenomenon is longer in the large cleaning mode in which the water level is higher than in the small cleaning mode. Therefore, in the large cleaning mode and the small cleaning mode, the same amount of cleaning water is substantially discharged from the jet discharge port 2b in order to induce the siphon phenomenon, while the duration of the siphon phenomenon can be extended in the large cleaning mode, and the cleaning power can be improved.

[0134] In the large cleaning mode, the period t L11 ~t L14 during which the water is discharged from the inner edge discharge port 2d is longer than the period t S11 ~t S13 during which the water is discharged from the inner edge discharge port 2d in the small cleaning mode. Therefore, the amount (volume) of the cleaning water discharged from the inner edge discharge port 2d is larger in the large cleaning mode than in the small cleaning mode. In this way, the total amount (volume) of the cleaning water used in the large cleaning mode (the volume of the entire cleaning water discharged from the inner edge discharge port 2d and the jet discharge port 2b) is larger than the total amount of the cleaning water used in the small cleaning mode.

[0135] The flush toilet device according to the second embodiment of the present application is such that the water level of the accumulated water in the basin 2a after the start of the discharge from the jet discharge port 2b is higher in the large cleaning mode than in the small cleaning mode. As a result, the duration of the siphon phenomenon is longer in the large cleaning mode in which the water level is higher than in the small cleaning mode. Therefore, in the large cleaning mode and the small cleaning mode, the same amount of cleaning water is substantially discharged from the jet discharge port 2b in order to induce the siphon phenomenon, while the duration of the siphon phenomenon can be extended in the large cleaning mode, and the cleaning power can be improved.

[0136] The flush toilet device according to the second embodiment of the present application is such that when the large cleaning mode is executed, the discharge from the inner edge discharge port 2d is continued from before the start of the discharge for inducing the siphon phenomenon to after the end of the discharge. Therefore, the surface of the basin 2a can be cleaned by the discharge from the inner edge discharge port 2d, the siphon action induced by the discharge from the inner edge discharge port 2d can be assisted, and the basin 2a can be replenished, and the discharge from the inner edge discharge port 2d can be effectively used for cleaning.

[0137] Next, the flush toilet device according to the third embodiment of the present application will be described. Figure 8 The flush toilet device according to the third embodiment of the present application will be described.

[0138] The cleaning sequence of the large cleaning mode and the small cleaning mode of the flush toilet device according to the present embodiment is the same as that of the first embodiment described above, and the structure of the flush toilet device for achieving this is different from that of the first embodiment described above. Therefore, only the parts of the third embodiment of the present application that are different from the first embodiment will be described below, and the description of the same structure, action, and effect will be omitted.

[0139] Figure 8is a view showing the overall structure of a flush toilet device according to a third embodiment of the present application.

[0140] As shown in Figure 8 , the flush toilet device 100 according to the present embodiment has a flush toilet body 102, a cleaning water tank device 104, and a cleaning control device 106 that controls cleaning of the flush toilet body 102. The flush toilet device 100 according to the present embodiment is configured to be able to perform a large cleaning or a small cleaning of a bowl portion 102a of the flush toilet body 102 by the cleaning control device 106 according to an operation of a remote controller 108 after use.

[0141] Further, the cleaning water tank device 104 has a cleaning water tank body, i.e., a storage water tank 110 that stores cleaning water to be supplied to the flush toilet body 102, a pressure pump 112 that pressurizes and supplies the cleaning water stored in the storage water tank 110 to the flush toilet body 102, a switching valve 114, and an on-off valve 116 that switches supply and stop of the cleaning water supplied from a water supply source, i.e., a water supply pipe C, to the switching valve 114.

[0142] The flush toilet body 102 has the bowl portion 102a that receives excrement, a lower water outlet, i.e., a jet water outlet 102b, provided at a position closer to the lower side than a water surface W of the bowl portion 102a, and an upper water outlet, i.e., an inner edge water outlet 102d, provided at an inner edge portion 102c of the bowl portion 102a. Further, a drain trap line 102e is communicated to the lower portion of the bowl portion 102a, and an inlet of the drain trap line 102e is directed toward the jet water outlet 102b in a facing manner.

[0143] The pressure pump 112 is configured to pressurize the cleaning water stored in the storage water tank 110 and to discharge the cleaning water from the jet water outlet 102b of the flush toilet body 102. The pressure pump 112 is operated to discharge the cleaning water from the jet water outlet 102b, thereby inducing a siphon phenomenon in the drain trap line 102e.

[0144] The switching valve 114 is configured to switch the cleaning water supplied from the water supply pipe C to the storage water tank 110 side or the inner edge water outlet 102d side. In a state where the switching valve 114 is switched to the storage water tank 110 side, the cleaning water supplied from the water supply pipe C and flowing through the switching valve 114 is stored in the storage water tank 110. On the other hand, in a state where the switching valve 114 is switched to the inner edge water outlet 102d side, the cleaning water supplied from the water supply pipe C and flowing through the switching valve 114 is discharged from the inner edge water outlet 102d of the flush toilet body 102.

[0145] The on-off valve 116 is configured to be provided on the upstream side of the switching valve 114 and to be able to switch the flow of the cleaning water supplied from the water supply pipe C to the switching valve 114, and stop the flow. In a state where the switching valve 114 is switched to the inner edge water discharge port 102d side, the on-off valve 116 is opened and closed to switch the water discharge from the inner edge water discharge port 102d, and stop the water discharge.

[0146] The cleaning control device 106 is configured to execute the small cleaning mode and the large cleaning mode based on an operation of the remote controller 108. That is, the cleaning control device 106 sends a control signal to the pressure pump 112, the switching valve 114, and the on-off valve 116 to execute the small cleaning mode and the large cleaning mode, respectively. Specifically, the cleaning control device 106 is configured by a microprocessor, a memory, an interface circuit, and software and the like for causing these to operate (none of which is illustrated above).

[0147] Next, the operation of the flush toilet device 100 according to the third embodiment of the present application will be described.

[0148] The sequence of the toilet cleaning performed by the flush toilet device 100 according to the present embodiment is the same as Figure 4 the sequence of the first embodiment illustrated in FIG. 6.

[0149] That is, in the flush toilet device 100 according to the present embodiment, the on-off valve 116 is opened and closed to switch the water discharge from the inner edge water discharge port 102d, and stop the water discharge. Figure 4 at the time t S0 in the standby state, the cleaning water is stored to a predetermined level in the water storage tank 110, the switching valve 114 is switched to the inner edge water discharge port 102d side, and the on-off valve 116 is closed.

[0150] Next, if the user performs the small cleaning operation by the remote controller 108 at the time t S1 The cleaning control device 106 executes the small cleaning mode. First, the cleaning control device 106 sends a control signal to the on-off valve 116 to open it. Thus, the cleaning water supplied from the water supply pipe C flows through the on-off valve 116 and the switching valve 114 to be discharged from the inner edge water discharge port 102d of the flush toilet body 102 as "front inner edge" water discharge. That is, the inner edge water discharge from the inner edge water discharge port 102d is directly performed by the water supply pressure of the water supply pipe C.

[0151] Next, at the time t S2 , the cleaning control device 106 sends a control signal to the pressure pump 112 to operate it. Thus, the cleaning water stored in the water storage tank 110 is pressurized and discharged from the jet water discharge port 102b of the flush toilet body 102. Thus, the siphon phenomenon is induced in the drain trap line 102e, and the excrement and the cleaning water in the bowl 102a flow through the drain trap line 102e to be discharged. Also, even at the time t S2After the water jetting begins, the water jetting from the inner edge outlet 102d continues as part of the "middle inner edge" water jetting process.

[0152] Moreover, the cleaning control device 106 at time t S3 A control signal is sent to the pressurization pump 112, causing it to stop. This stops the jetting of water from the jet nozzle 102b. Furthermore, even at time t... S3 After the jet of water is stopped, the water discharge from the inner edge discharge port 102d continues as "rear inner edge" water discharge. The flushing water discharged as "rear inner edge" water discharge is used to replenish the basin 102a of the toilet body 102.

[0153] Next, if at time t S4 Once the replenishment of the basin 102a is complete, the cleaning control device 106 sends a control signal to the switching valve 114, switching it to the water storage tank 110 side. As a result, cleaning water supplied from the tap water pipe C is supplied to the water storage tank 110, and water discharge from the inner edge spout 102d is stopped. Afterwards, when the water level in the water storage tank 110 returns to the specified level, the cleaning control device 106 opens the on / off valve 116 and simultaneously switches the switching valve 114 to the inner edge spout 102d side. Thus, the toilet flushing device 100 returns to the standby state before the start of toilet cleaning, ending the toilet cleaning based on the small cleaning mode.

[0154] in addition, Figure 4 The large cleaning mode shown in the lower column is also executed under the control of the cleaning control device 106. Here, at time t L1 After the inner edge begins to expel water, at time t L2 The period during which the pressure pump 112 operates is longer in the large cleaning mode than in the small cleaning mode. Therefore, at time t L2 When the pressurization pump 112 is activated and water is discharged from the jet nozzle 102b, the water level in the basin 102a is higher than that in the small cleaning mode.

[0155] Moreover, at time t L2 ~t L3 In the middle, the pressure pump 112 is in time t with the small cleaning mode. S2 ~t S3 The same working time and the same working speed are used. Therefore, the amount of cleaning water discharged from the jet nozzle 102b to induce a siphon effect in the drain bend 102e is substantially the same in both the large cleaning mode and the small cleaning mode. In this way, even with the use of the water storage tank 110 and the booster pump 112, the flushing toilet device 100 of this embodiment can perform the same large cleaning mode and small cleaning mode as the first embodiment of the present invention.

[0156] In addition, by changing the timing at which the pressurizing pump 112, the switching valve 114, and the opening / closing valve 116 operate, the structure of the flush toilet device 100 of the present embodiment also makes it possible to perform the same large flush mode and small flush mode as the second embodiment of the present invention shown in FIG. 6. Figure 6 The large flush mode and the small flush mode can be performed in the same manner as the second embodiment of the present invention shown in FIG. 6.

[0157] Although the embodiments of the present invention have been described above, various modifications can be added to the above-described embodiments. In particular, in the above-described embodiments, although the water jet from the inner edge water outlet is supplied directly from the water supply pipe, and the water jet from the jet water outlet is supplied from the water storage tank, these water supply sources can be arbitrarily combined. Furthermore, in the above-described embodiments, the inner edge water outlet is provided as an upper water outlet that is closer to the upper side than the water storage surface, and the jet water outlet is provided as a lower water outlet that is closer to the lower side than the water storage surface, but the positions of these water outlets can be appropriately changed to be above and below the water storage surface. In addition, any of the constituent elements provided in each of the above-described embodiments of the present invention can be arbitrarily combined with the structures of the other embodiments to constitute the present invention.

Claims

1. A flushing toilet device capable of performing a large cleaning mode and a small cleaning mode, characterized in that, It has: a flush toilet body, a basin and a drain pipe connected to the lower part of the basin, an upper water outlet located closer to the top of the water surface of the basin, and a lower water outlet located closer to the bottom of the water surface. The system includes a cleaning control device that controls the discharge of cleaning water from the upper and lower water outlets, and executes a large cleaning mode and a small cleaning mode with a smaller water volume than the large cleaning mode. In both the large cleaning mode and the small cleaning mode, the cleaning control device discharges substantially the same amount of cleaning water from the lower outlet in order to induce a siphon effect in the drain bend. On the other hand, it controls the water discharge from the upper outlet in a manner that differs in the water level in the basin of the water discharged from the lower outlet in both the large cleaning mode and the small cleaning mode.

2. The flushing toilet device according to claim 1, characterized in that, When the cleaning control device executes the large cleaning mode, the water flow rate from the upper water outlet up to the start of water discharge from the lower water outlet is greater than that when executing the small cleaning mode, or the water discharge time is extended, thereby making the water level in the basin at the start of water discharge from the lower water outlet higher in the large cleaning mode than in the small cleaning mode.

3. The flushing toilet device according to claim 1, characterized in that, Before a siphon occurs in the drain bend, the cleaning control device begins to discharge water from the lower outlet.

4. The flushing toilet device according to claim 1, characterized in that, in Before the water level in the basin reaches a stable level where the flow rate of the cleaning water flowing out through the drain bend is the same as the flow rate of the cleaning water flowing into the basin from the upper outlet, the cleaning control device begins to discharge water from the lower outlet.

5. The flushing toilet device according to claim 1, characterized in that, When the cleaning control device executes the large cleaning mode, the water flow rate from the upper water outlet after the water discharge from the lower outlet begins is greater than that when executing the small cleaning mode, or the water discharge time is extended, thereby making the water level in the basin after the water discharge from the lower outlet begins higher in the large cleaning mode than in the small cleaning mode.

6. The flushing toilet device according to claim 5, characterized in that, At least during the execution of the large cleaning mode, the cleaning control device controls the water discharge from the upper water discharge outlet so that the water level in the basin is higher than the upper end of the inlet of the drain bend pipe before the water discharge from the lower water discharge outlet begins.

7. The flushing toilet device according to claim 5, characterized in that, When the cleaning control device executes the large cleaning mode, it continues to discharge water from the upper water outlet from the lower water outlet until the water discharge ends, before the water discharge used to induce the siphon phenomenon begins from the lower water outlet.

8. The flushing toilet device according to any one of claims 1 to 7, characterized in that, It also includes: a cleaning water tank body for storing cleaning water; a drain valve for switching the discharge and stopping of cleaning water in the cleaning water tank body; and an on / off valve for switching the discharge and stopping of cleaning water supplied from the water source. The cleaning control device discharges cleaning water from the lower outlet by opening the drain valve and discharges cleaning water from the upper outlet by opening the on / off valve.

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