JP2024007689A - Water closet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water closet that secures kinetic energy necessary for dirt discharge, so that it can realize both water saving and washing performance.

SOLUTION: The present invention comprises: a bowl part 12 that consists of a bowl-shaped dirt-receiving surface 13 and a rim part 14 formed at the upper edge of the dirt-receiving surface; a discharge trap pipeline 16 connected to the lower part of the bowl to discharge dirt; a jet water discharge part 26 arranged at the lower part of the bowl part, and equipped with a jet water discharge hole 28 that discharges wash water supplied from a water tank 8 towards the discharge trap pipeline; and a control device 54 to control flow rate and flow speed of the wash water discharged from the jet water discharge hole. The control device comprises a first mode and a second mode, and controls the flow rate and flow speed of the second mode to be less than the flow rate of the first mode and faster than the flow speed of the first mode, respectively.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a flush toilet that cleans with flush water and discharges waste, and particularly relates to a flush toilet that saves water.

Conventionally, for example, as described in Patent Document 1, a bowl portion including a bowl-shaped dirt receiving surface and a rim portion formed on the upper edge of this dirt receiving surface, and a bowl portion provided on the rim portion. A rim spout spout that spews cleansing water, a trap pipe connected to the lower part of the bowl part for discharging dirt, and a jet spout that spouts cleansing water into the trap pipe to generate a siphon action. Flush toilets are known.
In this flush toilet, flush water is spouted from the rim spout and the flush water is swirled to clean the toilet body, and the flush water spouted from the jet spout generates a siphon effect in the trap pipe. This siphon action allows waste to be discharged to the outside.

In the flush toilet of Patent Document 1, since the opening area of the jet spout is constant, increasing the flow rate of flush water spouted from the jet spout increases the flow rate (instantaneous flow rate); When the flow velocity of is slowed down, the flow rate (instantaneous flow rate) also decreases. Therefore, if the flow rate is reduced in order to conserve water, the flow rate of the cleaning water will also be slowed down, resulting in a situation where the kinetic energy necessary for discharging the waste cannot be secured.

JP2018-3263A

In the above-mentioned siphon jet type flush toilet that spews flush water from the jet spout to generate a siphon effect, the amount of flush water spouted from the jet spout is equal to the amount of water spouted from the rim spout. Since this amount is larger than the amount of flushing water, by reducing the amount of flushing water spouted from the jet spout, it is expected that the total amount of flushing water used in the flush toilet can be saved.
However, reducing the amount of wash water spouted from the jet spout is problematic because it becomes difficult to generate and maintain the siphon action.

The present invention was made in order to solve the problems of the prior art described above, and increases the flow velocity with a small flow rate while maintaining the siphon effect, thereby securing the kinetic energy necessary for draining waste, thereby saving water. The purpose of the present invention is to provide a flush toilet that can achieve both cleaning performance.

In order to achieve the above object, the present invention provides a flush toilet that flushes and discharges filth with flush water supplied from a flush water source, which comprises a bowl-shaped filth receiving surface and an upper part of the filth receiving surface. a rim portion formed on the edge; a drain trap pipe connected to the lower part of the bowl portion for discharging waste; and a cleaning water provided at the lower portion of the bowl portion and supplied from a cleaning water source. and a jet water spouting section equipped with a jet spout that spouts cleaning water toward the drain trap pipe, and a jet water spouting control section that controls the flow rate and flow rate of the cleaning water spouted from the jet spout. , the jet water discharge control unit has a first mode and a second mode, and controls the flow rate and flow rate in the second mode to be lower than the flow rate in the first mode and faster than the flow rate in the first mode. It is a feature.
In the present invention configured as described above, the jet water spout control unit that controls the flow rate and flow rate of the cleaning water spouted from the jet spout has a first mode and a second mode, and is controlled to be lower than the flow rate in the first mode and faster than the flow rate in the first mode, so in the first mode where the flow rate is large and the flow rate is slow, a siphon effect is generated early, and then the flow rate is By using the second mode in which the flow rate is low and the flow rate is high, floating filth can be discharged while maintaining the siphon effect. As a result, according to the present invention, the flow velocity is increased with a small flow rate while maintaining the siphon action in the second mode, so that the kinetic energy necessary for draining waste is secured, and water saving and cleaning performance are both achieved. Can be done.

In the present invention, preferably, the jet water discharge control unit controls the total flow rate of the wash water in the second mode to be smaller than the total flow rate of the wash water in the first mode.
In the present invention configured in this manner, the jet water discharging control section controls the total flow rate of cleaning water in the second mode to be smaller than the total flow rate of cleaning water in the first mode. Two modes make it possible to save water.

Preferably, the present invention further includes an aeration mechanism that mixes air into the cleaning water, and the jet water spout control section in the second mode uses the aeration mechanism to mix air into the cleaning water spouted from the jet water spout. The mixture is controlled to reduce the flow rate and increase the flow velocity.
In the present invention configured in this way, the jet water spouting control unit controls to reduce the flow rate by mixing air into the cleaning water spouted from the jet spout using the air mixing mechanism in the second mode. Therefore, by using the air entrainment mechanism, the flow velocity can be increased with a small flow rate in the second mode, and the kinetic energy necessary for draining waste can be secured, making it possible to achieve both water saving and cleaning performance.

In the present invention, preferably, the washing water source is a water storage tank that stores washing water, and the jet water discharge control section mixes air into the washing water using an aeration mechanism when the water level of the water storage tank is lower than a predetermined position. do.
In the present invention configured in this manner, when the water level in the water storage tank is lower than a predetermined level, the jet water discharging control section mixes air into the cleaning water using the air mixing mechanism, thereby reducing the flow rate in the second mode. By increasing the flow velocity, it is possible to secure the kinetic energy necessary for discharging waste, achieving both water conservation and cleaning performance.

The present invention preferably further includes a diameter reduction/expansion mechanism that reduces or expands the opening area of the jet water spout, and the jet water spout control section reduces the opening area of the jet water spout in the second mode. The diameter is reduced by the diameter expansion mechanism to reduce the flow rate and increase the flow velocity.
In the present invention configured as described above, the jet water spout control section reduces the opening area of the jet water spout in the second mode by using the diameter reduction/expansion mechanism, thereby reducing the flow rate in the second mode. Since the flow rate becomes faster in the second mode, the flow rate can be increased with a lower flow rate in the second mode to secure the kinetic energy necessary for discharging waste, making it possible to achieve both water conservation and cleaning performance.

In the present invention, preferably, the jet water spout control section reduces the diameter of the opening area of the jet spout to increase the flow rate of the wash water spouted from the jet spout, or increases the diameter of the opening area of the jet spout. This will reduce the flow rate of the wash water.
According to the present invention configured in this way, the jet water spouting control section reduces the diameter of the opening area of the jet spout to increase the flow rate of the cleaning water spouted from the jet spout, or Since the opening area is expanded to reduce the flow rate of the cleaning water, water saving and cleaning performance can be achieved at the same time by simply reducing or expanding the opening area of the jet spout.

According to the flush toilet of the present invention, it is possible to increase the flow velocity with a small flow rate while maintaining the siphon effect, secure the kinetic energy necessary for discharging waste, and achieve both water saving and cleaning performance.

FIG. 1 is an overall configuration diagram showing a flush toilet according to a first embodiment of the present invention. It is a time chart showing the cleaning operation of the flush toilet according to the first embodiment of the present invention. FIG. 2 is a conceptual diagram for explaining the operating principle of a jet pump mechanism. 1 is a conceptual diagram showing a water storage tank of a flush toilet and a small tank device for a jet pump according to a first embodiment of the present invention. FIG. 2 is a conceptual diagram showing the flow of flushing water in the jet pump small tank device of the flush toilet according to the first embodiment of the present invention. FIG. 2 is a diagram showing the relationship between flow rate (L/min) and time in a first mode and a second mode of the flush toilet according to the first embodiment of the present invention. FIG. 3 is a partial configuration diagram showing a flush toilet according to a second embodiment of the present invention. It is a conceptual diagram which shows the diameter reduction and expansion mechanism provided in the jet water spout part of the flush toilet according to a second embodiment of the present invention. It is a figure showing the toilet flushing switch of the modification of the flush toilet according to the embodiment of the present invention.

Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings. First, referring to FIG. 1, a flush toilet according to a first embodiment of the present invention will be described. FIG. 1 is an overall configuration diagram showing a flush toilet according to a first embodiment of the present invention.

As shown in FIG. 1, a flush toilet 1 according to a first embodiment of the present invention includes a toilet body 2 made of ceramic, a valve unit 4 that supplies flush water to the toilet body 2, and a water storage that stores flush water. A tank 8, a small tank 3 provided on the downstream side of the water storage tank 8 to store washing water, a jet pump small tank device 6 incorporating a jet pump mechanism 5, and the washing water stored in the water storage tank 8 are added. It is equipped with a pressurizing pump 10 that pressurizes and supplies it to a small jet pump tank device 6.

The toilet main body 2 has a bowl part 12, and the bowl part 12 includes a bowl-shaped dirt receiving surface 13 and a rim part 14 formed on the upper edge of the dirt receiving surface 13 and having an inner circumferential surface. . The toilet main body 2 further includes a drain trap conduit 16 that is connected to the bottom of the bowl portion 12 and discharges waste. A rim water conduit 18 is formed inside the rim portion 14, and a rim water spout 22 for discharging rim water is formed in a rim water spouting portion 20, which is the downstream end of the rim water conduit 18. The rim water spout 22 is formed in the right front region of the bowl portion 12 when the flush toilet 1 is viewed from the front, and spouts flush water rearward and swirls along the inner circumferential surface of the rim portion 14. It is designed to form a flow.

A jet water conduit 24 is formed below the toilet main body 2, and a jet water spout 28 for discharging jet water is formed in a jet water spouting portion 26 which is the downstream end of the jet water conduit 24. The jet spout 28 is located at the bottom of the bowl portion 12 and is arranged substantially horizontally facing the inlet 16a of the drain trap pipe 16, and spouts cleaning water toward the inlet 16a of the drain trap pipe 16. It is supposed to be done.

The drain trap pipe line 16 consists of an inlet part 16a, a trap rising pipe 16b rising from the inlet part 16a, and a trap descending pipe 16c descending from the trap rising pipe 16b. The top portion 14d is between the two. Here, a drain socket 30 is connected to the lower end of the trap descending pipe 16c of the drain trap conduit 16.

The flush toilet bowl 1 is directly connected to a water pipe 32 that supplies flush water, and flush water is spouted from the rim spout 22 by the pressure of the water supply. Further, the cleaning water stored in the water storage tank 8 is pressurized by the pressurizing pump 10, and is supplied to the jet water spouting section 26 via the jet pump small tank device 6, so that the cleaning water at a water-saving flow rate is supplied. Water is spouted from the jet spout 28.

Next, the valve unit 4 of the flush toilet 1 will be explained. As shown in FIG. 1, a main water supply channel 34 is provided to which washing water is supplied from a water supply pipe 32 that is a water supply source, and this main water supply channel 34 includes, from the upstream side, a stop valve 36, a strainer 38, a branch A metal fitting 40, a constant flow valve 42, a diaphragm type electromagnetic on-off valve 44, and a water supply channel switching valve 46 are provided, respectively. The constant flow valve 42, the electromagnetic on-off valve 44, and the water supply channel switching valve 46 are integrally assembled as the valve unit 4. The main water supply channel 34 is composed of a water supply hose connected to the water pipe 32 outside the toilet bowl and a resin pipe connected downstream of the water supply hose.

Furthermore, on the downstream side of the water supply channel switching valve 46, there are a rim side water supply channel 48 for supplying wash water to the rim spout 22, and a tank side water supply channel 50 for supplying wash water to the water storage tank 8. It is connected. The rim water conduit 18 is connected to the downstream end of the rim side water supply channel 48, so that wash water is spouted from the rim spout 22.

The constant flow valve 42 is for restricting the wash water that has flowed in through the stop valve 36, the strainer 38, and the branch fitting 40 to a predetermined flow rate or less. Further, the cleaning water that has passed through the constant flow valve 42 flows into the electromagnetic on-off valve 44, and the washing water that has passed through the electromagnetic on-off valve 44 is transferred from the rim side water supply channel 48 on the rim side to the rim by the water supply channel switching valve 46. The water is supplied to the water storage tank 8 from the water spout 22 or from a tank-side water supply channel 50 on the tank side.

The water supply channel switching valve 46 can supply cleaning water to both the rim side water supply channel 48 and the tank side water supply channel 50 at the same timing, and can arbitrarily change the water supply amount and flow rate ratio to the rim side and the tank side. It is a switching valve that can

A jet side water supply channel 52 is connected to the lower part of the water storage tank 8, and this jet side water supply channel 52 is provided with a pressure pump 10 and a jet pump tank 6. The flow rate of the cleaning water supplied to the jet pump tank 6 is controlled, and as will be described in detail later, the flow rate and flow rate of the cleaning water discharged from the jet water spout 28 by the jet pump tank 6 are controlled. It has become.

Inside the water storage tank 8, an upper end float switch 56 and a lower end float switch 58 are arranged. The upper end float switch 26 is turned on when the water level in the water storage tank 8 reaches a predetermined position L2 slightly lower than the highest water level L3 during normal use, and closes the electromagnetic on-off valve 44. The lower end float switch 58 is turned on when the water level in the water storage tank 8 falls to the lowest water level L1 during normal use, and the pressure pump 10 and jet pump mechanism 5 are stopped.

Furthermore, a toilet flushing switch 60 and a control device 62 are provided which are operated by the user. This control device 62 is a jet water discharging control section, which controls the opening/closing operation of the electromagnetic on-off valve 44, the switching operation of the water supply channel switching valve 46, the rotation speed and operating time of the pressurizing pump 10, and the control in the jet pump small tank device 6. It is used to control the operating time etc. of the jet pump mechanism 5.

When the toilet flushing switch 60 is pressed by the user, the control device 62 sequentially operates the electromagnetic on-off valve 44, the water supply channel switching valve 46, the pressure pump 10, and the jet pump mechanism 5 to discharge water from the rim spout 22, While continuing the rim water spouting, water spouting from the jet water spout 28 is then started to generate a siphon action, thereby cleaning the bowl portion 12 and discharging dirt.

Further, when the water level reaches L2 and the upper end float switch 56 is turned on, the control device 62 closes the electromagnetic on-off valve 44 to stop the supply of cleaning water to the water storage tank 8, and the water level drops to L1. Then, the lower end float switch 58 is turned on, the pressurizing pump 10 is stopped, and jet water discharging is ended.
Further, after the cleaning is completed, the control device 62 opens the electromagnetic on-off valve 44, switches the water supply channel switching valve 46 to the water storage tank 8 side, and replenishes the water storage tank 8 with cleaning water.

Next, the cleaning operations of rim cleaning and jet cleaning by the flush toilet 1 will be explained with reference to FIG. FIG. 2 is a time chart showing the flushing operation of the flush toilet according to the first embodiment of the present invention.
As shown in FIG. 2, the cleaning water supplied from the valve unit 4 is discharged from the rim spout 22 to the bowl part 12, and the cleaning water supplied by the pressure pump 10 and the jet pump mechanism 5 is jetted. Water is discharged from the water port 28 toward the inlet portion 16a of the drain trap pipe line 16.

Rim cleaning starts at time t1, pre-rim cleaning is performed from time t1 to time t5, and then post-rim cleaning is performed from time t5 to time t6. During the front rim cleaning and the rear rim cleaning, cleaning water is supplied from the valve unit 4 to the rim water spouting section 20 at tap water pressure and at a constant flow rate.

In the jet cleaning, the pressure pump 10 is turned on at time t2, and thereafter, at time t3, supply of cleaning water stored in the water storage tank 8 to the jet spout 28 is started. Furthermore, in the jet cleaning, at time t4, the rotation speed of the pressure pump 10 is lowered to reduce the flow rate (instantaneous flow rate) of the cleaning water, and then at time t5, the pressure pump 10 is turned off. Finish the jet cleaning.

In the above example, in the jet cleaning, at time t4, the rotation speed of the pressure pump 10 is lowered to reduce the flow rate (instantaneous flow rate) of the cleaning water, but at time t4, the rotation speed of the pressure pump 10 is lowered. The jet cleaning may be completed by not lowering the pressure and then turning off the pressure pump 10 at time t5.

Next, the operating principle of the jet pump mechanism 5 included in the jet pump small tank device 6 described above will be explained with reference to FIG. FIG. 3 is a conceptual diagram for explaining the operating principle of the jet pump mechanism.

As shown in FIG. 3(a), the jet pump small tank device 6 includes a small tank 3 for storing wash water and a jet pump mechanism 5. The jet pump mechanism 5 includes a jet nozzle 70 arranged at the lower part of the small tank 3 and a throat pipe 72 arranged above the jet nozzle 70. A suction port 72a is formed at the lower end (upstream end) of this throat pipe 72, and the upper end (downstream end) is connected to the downstream side of the jet side water supply channel 52 (see FIG. 1).

A water and air introduction pipe (air mixing pipe) 74 for introducing cleaning water and air into the throat pipe 72 is connected to an intermediate position between the throat pipe 72 and an opening 74a at the upper end of the water and air introduction pipe 74. This opening 74a is provided at the water level L4 in the small tank 3.

As shown in FIG. 3, in the jet pump mechanism 5, high-speed cleaning water is jetted from the jet nozzle 70 toward the suction port 72a of the throat pipe 72, and at this time, the suction inside the throat pipe 72 near the jet nozzle 70 is The space near the opening 72a becomes a negative pressure, and this negative pressure induces a jet pump action (ejector effect). Due to this jet pump action, cleaning water in the vicinity of the small tank 3 is sucked, and the sucked cleaning water and the cleaning water spouted from the jet nozzle 70 are combined, flow inside the throat pipe 72, and flow toward the jet side. It is supplied to the downstream side of the water supply channel 52.

Furthermore, when the water level in the small tank 3 is above the water level L4, cleaning water flows into the throat pipe 72 from the water/air introduction pipe 74 (see FIG. 3(a)), and then When the water level falls below the water level L4, air is mixed into the throat pipe 72 from the water/air introduction pipe 74 (see FIG. 3(b)).

While the water level in the small tank 3 falls to L4 after the jet nozzle 70 starts spraying, the flow rate of the cleaning water flowing through the throat pipe 72 increases, and the flow rate decreases accordingly. On the other hand, when the water level in the small tank 3 falls below L4, the flow rate of the cleaning water flowing through the throat pipe 72 does not increase, but air is mixed into the throat pipe 72 and the cross section of the throat pipe 72 is narrowed by the air. Therefore, the flow rate of the cleaning water increases accordingly.

Next, the operation of the jet pump small tank device 6 will be explained with reference to FIGS. 4 to 6. FIG. 4 is a conceptual diagram showing a water storage tank of a flush toilet and a small tank device for a jet pump according to the first embodiment of the present invention, and FIG. 5 shows the flow of flush water in the small tank device for a jet pump. This is a conceptual diagram, and FIG. 6 is a diagram showing the relationship between flow rate (L/min) and time in the first mode and second mode of the flush toilet according to the first embodiment of the present invention.

First, as shown in FIG. 4, the cleaning water stored in the water storage tank 8 is supplied to the jet pump small tank device 6 by the pressurizing pump 10. At this time, as shown in FIGS. 4 and 5, in the jet pump small tank device 6, as the water level of the small tank 3 decreases, cleaning water is initially introduced into the throat pipe 72 from the water/air introduction pipe 74. After that, air is introduced into the throat pipe 72 from the water/air introduction pipe 74.

The throat pipe 72 described above can be arranged in any direction such as diagonally upward or horizontally as shown in FIGS. 3, 4, and 5.

In this embodiment, the cleaning operation when the cleaning water is introduced into the throat pipe 72 from the water/air introduction pipe 74 is called the first mode, and the cleaning operation when the washing water is introduced into the throat pipe 72 from the water/air introduction pipe 74 is called the first mode. The cleaning operation when cleaning is called the second mode.
As shown in FIG. 6, from time t10 to time t11 indicates the flow rate Q1 (L/min) of the cleaning water during the cleaning operation in the first mode, and from time t11 to time t12 indicates the leading operation in the second mode. The flow rate Q2 (L/min) of the cleaning water at the time is shown. As an example, as shown in FIG. 5, Q1=70L/min and Q2=35L/min.

As described above, the flow rate Q1 in the first mode (from time t10 to time t11) is large, but the flow velocity is slow. On the other hand, the flow rate Q2 in the second mode (from time t11 to time t12) is small, but the flow velocity is high.
Furthermore, as shown in FIG. 6, the total flow rate Q1total (L) in the first mode is set to be larger than the total flow rate Q2total (L) in the second mode.

Next, a flush toilet according to a second embodiment of the present invention will be described with reference to FIGS. 7 and 8. FIG. 7 is a partial configuration diagram showing a flush toilet according to a second embodiment of the present invention, and FIG. 8 is a diagram illustrating a diameter reduction/expansion mechanism provided in a jet water spout portion of a flush toilet according to a second embodiment of the present invention. FIG.

The flush toilet 80 according to the second embodiment of the present invention does not have the jet pump small tank device provided in the flush toilet 1 of the first embodiment described above (see FIG. 7), but instead A diameter reduction/expansion mechanism 82 is provided.
This diameter reduction/expansion mechanism 82 is provided in the ZED water guide section 26 and expands the opening area of the rim water spout 28 to discharge a large flow rate of cleaning water with a slow flow rate, thereby increasing the opening area of the rim water spout 28. This is a mechanism that reduces the diameter and discharges cleaning water with a small flow rate and a high flow rate.
In this second embodiment as well, similarly to the first embodiment described above, the cleaning operation in which cleaning water is discharged at a large flow rate with a slow flow rate is called the first mode, and the cleaning operation in which cleaning water is discharged at a small flow rate and at a fast flow rate is called the first mode. The operation is called the second mode.

As shown in FIG. 8, the diameter expansion/reduction mechanism 82 includes a conical valve 84, a ball screw 86 connected to the valve 84, and a motor 86 for rotating the ball screw 86.
According to this diameter expansion mechanism 82, when the ball screw 86 is rotated by the motor 88, the valve 84 moves in the front-rear direction. When the valve 84 moves forward, the opening area between the valve 84 and the jet water spout 26 becomes smaller, and the opening area of the jet water spout 26 is reduced in diameter and becomes smaller. When the valve 84 moves rearward, the opening area between the valve 84 and the jet water spout 26 increases, and the diameter of the opening area of the jet water spout 26 increases.

In the flush toilet 80 according to the second embodiment, in the first mode, the diameter reduction/expansion mechanism 82 expands the opening area of the jet water spout 26 to discharge flush water with a large flow rate and a slow flow rate. Water is spouted from the water spout 26 , and in the second mode, the opening area of the jet spout 26 is reduced by the diameter-reducing/expanding mechanism 82 , and cleaning water with a small flow rate and a high flow rate is spouted from the jet spout 26 . It is supposed to be done.

Next, a modification of the flush toilet according to the embodiment of the present invention will be described with reference to FIG. FIG. 9 is a diagram showing a toilet flush switch of a modified example of the flush toilet according to the embodiment of the present invention.
As shown in FIG. 9, the toilet cleaning switch 60 is provided with a soft stool switch 90a and a hard stool switch 90b as stool switches.

In this modification, when the soft stool switch 90a is pressed, a large flow rate and low flow rate of washing water is spouted from the jet spout 26 for a long time as in the first mode described above, and the soft stool that adheres to the bowl part 12 is discharged. can be washed.
When the hard stool switch 90b is pressed, a small flow rate and high flow rate of washing water is spouted from the jet spout 26 for a short period of time, similar to the second mode described above, to wash away hard stools attached to the bowl portion 12. is now possible.

Next, the effects of the embodiments (first embodiment and second embodiment) of the present invention described above will be explained.
First, according to the flush toilet 1, 80 according to the present embodiment, the control device 54 that controls the flow rate and flow velocity of the flush water spouted from the jet spout 28 has a first mode and a second mode. Since the flow rate Q1 (L/min) and flow rate of the mode are controlled to be lower than the flow rate Q2 (L/min) of the first mode and faster than the flow rate of the first mode, the flow rate is large and the flow rate is slow. In the first mode, the siphon effect is generated early, and then in the second mode, where the flow rate is low and the flow velocity is high, the floating waste can be discharged while maintaining the siphon effect. As a result, according to the flush toilet 1, 80 invention according to the present embodiment, the flow rate is increased with a small flow rate while maintaining the siphon action in the second mode, so the kinetic energy necessary for draining waste is secured, It is possible to achieve both water saving and cleaning performance.

Next, in the flush toilets 1 and 80 according to the present embodiment, the control device 54 controls the total flow rate of flush water in the second mode Q2total to be smaller than the total flow rate of flush water in the first mode Q1total. Since the second mode controls water consumption, it is possible to save water.

Next, the flush toilet 1 according to the first embodiment further includes a water/air introduction pipe 74 that mixes air into the flush water, and the control device 54 controls water to be spouted from the jet spout 28 in the second mode. By mixing air into the cleaning water through the water/air introduction pipe 74, the flow rate is reduced and the flow velocity is controlled to be increased. Therefore, by using the water/air introduction pipe 74, the flow velocity is increased with a small flow rate in the second mode. By doing so, it is possible to secure the kinetic energy necessary for discharging waste, thereby achieving both water conservation and cleaning performance.

Next, in the flush toilet 1 according to the first embodiment, when the water level in the water storage tank 8 falls below a predetermined position L4, the control device 54 causes the water-air introduction pipe 74 to mix air into the flush water. In the second mode, the flow rate is increased with a small flow rate to secure the kinetic energy necessary for discharging waste, thereby making it possible to achieve both water saving and cleaning performance.

Next, the flush toilet 80 according to the second embodiment includes a diameter reduction/expansion mechanism 82 that reduces or expands the opening area of the jet spout 28, and the control device 54 controls the jet spout in the second mode. Since the opening area of the water port 28 is reduced by the diameter reduction/expansion mechanism 82 to reduce the flow rate, the flow rate becomes faster in the second mode, so the flow rate is increased with a smaller flow rate in the second mode, and waste is discharged. It is possible to secure the kinetic energy necessary for cleaning, thereby achieving both water conservation and cleaning performance.

Next, in the flush toilet 80 according to the second embodiment, the control device 54 reduces the diameter of the opening area of the jet spout 28 to increase the flow rate of flush water spouted from the jet spout, or Since the opening area of the water spout 28 is expanded to reduce the flow rate of the cleaning water, it is possible to achieve both water saving and cleaning performance by simply reducing or expanding the opening area of the jet water spout.

1, 80 Flush toilet 2 Toilet main body 3 Small tank 4 Valve unit 5 Jet pump mechanism 6 Jet pump small tank device 8 Water storage tank 10 Pressure pump 12 Bowl portion 13 Sewage receiving surface 14 Rim portion 16 Drain trap conduit 20 Rim Water spout section 22 Rim water spout 24 Jet water guide section 26 Jet water spout 28 Jet water spout 46 Water supply channel switching valve 48 Rim side water supply channel 50 Tank side water supply channel 52 Jet side water supply channel 54 Control device (Z water discharge control section)
60 Toilet bowl cleaning switch 70 Jet nozzle 72 Throat pipe 74 Water and air introduction pipe 74a Opening 82 Diameter expansion mechanism 90a Soft stool switch 90b Hard stool switch

Claims (6)

A flush toilet that flushes and discharges waste with flush water supplied from a flush water source,
A bowl portion including a bowl-shaped dirt receiving surface and a rim portion formed at the upper edge of the dirt receiving surface;
A drainage trap pipe connected to the lower part of the bowl part and discharging waste;
a jet spout section provided at a lower part of the bowl section and equipped with a jet spout port that spouts cleaning water supplied from the cleaning water source toward the drain trap pipe;
It has a jet water spout control unit that controls the flow rate and flow rate of the cleaning water spouted from the jet water spout,
The jet water discharging control section has a first mode and a second mode, and controls the flow rate and flow rate in the second mode to be lower than the flow rate in the first mode and faster than the flow rate in the first mode. Features a flush toilet. The flush toilet according to claim 1, wherein the jet water discharge control unit controls the total flow rate of flush water in the second mode to be smaller than the total flow rate of flush water in the first mode. Furthermore, it has an aeration mechanism that mixes air into the cleaning water, and in the second mode, the jet water spouting control section mixes air into the cleaning water spouted from the jet water spout by using the aeration mechanism to increase the flow rate. The flush toilet according to claim 1, wherein the flush toilet is controlled so that the flow rate is decreased and the flow rate is increased. The washing water source is a water storage tank that stores washing water, and the jet water discharge control unit mixes air into the washing water using the aeration mechanism when the water level of the water storage tank is lower than a predetermined position. 3. The flush toilet described in 3. Furthermore, the jet water spout control section has a diameter reduction/expansion mechanism that reduces or expands the opening area of the jet water spout, and the jet water spout control section reduces the opening area of the jet water spout by the diameter reduction/expansion mechanism in the second mode. The flush toilet according to claim 1, wherein the flush toilet is reduced in diameter to reduce the flow rate and increase the flow velocity. The jet water spout control section reduces the diameter of the opening area of the jet spout to increase the flow rate of the cleaning water spouted from the jet spout, or increases the diameter of the opening area of the jet spout to increase the flow rate of the cleaning water. The flush toilet according to claim 1, wherein the flushing toilet reduces the amount of water.

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