JP5130998B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet in which a bowl portion of a toilet body is washed with wash water supplied from a water storage tank, and water accumulated in the bowl portion is discharged by a siphon action.

  Flush toilets that discharge waste water containing dirt by siphon action are widely used. In this type of flush toilet, the accumulated water in the bowl part is discharged from the trap drainage along with the filth by the siphon action, but when the water level drops to the upper edge of the trap drainage channel, The sound is jarring and irritating. In order to reduce the siphoning noise, for example, in Patent Document 1, air is introduced into the trap drain immediately before the siphoning operation is finished to reduce the siphoning attraction force and to reduce the air suction force. Therefore, it has been proposed to reduce the siphon sound.

  More specifically, the flush toilet of Patent Document 1 immediately before the end of siphon action from the air intake hole that is open to the trap drainage channel from the intake pipe that is always open to the atmosphere in the water storage tank, through the air guide chamber. The air is discharged. In this flush toilet, in the initial state, the water level in the bowl portion and the water level in the air guide chamber are the same, but the water level of each water level decreases as the siphon action starts. At this time, since the space of the air guide chamber is smaller than the space of the bowl portion, the water storage surface of the air guide chamber is lowered more quickly, so that the air is trapped from the air guide holes faster than the air is sucked from the inside of the bowl portion. The air can be discharged.

JP 2006-152664 A

  However, in the conventional flush toilet described above, first, there is a possibility that sewage may enter the air introduction chamber from the air introduction hole, so that odor accumulates in the air in the air introduction chamber and the odor may be released from the intake pipe. is there. Next, since the air guide chamber varies depending on the shape of the toilet bowl and each toilet, air may be released from the air guide hole earlier or later than immediately before the end of the siphon action. In order to prevent such fluctuation, in Patent Document 1, an air introduction adjustment valve for adjusting the air introduction amount is provided in the intake pipe, and the air introduction adjustment valve is throttled to reduce the air introduction amount, thereby introducing air introduction holes. The timing of air release from the air is adjusted, but if the amount of air introduced is reduced, the amount of air that is introduced into the trap drainage will also be reduced, so the siphon action will not be sufficiently reduced, and the siphon-breaking sound will be reduced. There arises a new problem that the reduction of the amount cannot be sufficiently performed.

  Therefore, the present invention has been made to solve the problems of the prior art, and provides a flush toilet that can prevent odors from being scattered and sufficiently reduce siphoning noise. It is an object.

In order to achieve the above-described object, the present invention is a flush toilet that flushes the bowl portion of the toilet body with wash water supplied from a water storage tank and discharges the accumulated water in the bowl portion by siphon action, A water conduit formed to guide wash water from the water storage tank to the bowl of the toilet body, a trap drain connected to the outlet of the bowl to generate siphon action, and an upper edge of the trap drain at one end An air introduction hole that is located above and communicates with the trap drainage channel is formed, and at the other end, in the standby state, the water level of the water storage tank is lowered after being submerged by a predetermined height in the cleaning water in the water storage tank and starting the cleaning operation. And an air intake passage formed with an air suction opening that is opened to the atmosphere, and in the air intake passage, water is accumulated in a standby state, and the water stored in the air intake passage is guided by siphon action. Tiger from the pores In addition, the drainage of the stored water in the air introduction passage is completed immediately before the water level in the bowl section drops and the air is drawn into the trap drainage path from the bowl section, and the atmosphere is introduced. It is characterized by being configured to be introduced into the trap drainage channel from the pores.
In the present invention configured as above, first, the air suction port formed at the other end of the air guide passage is submerged by a predetermined height in the wash water in the water storage tank in the standby state, and after the start of the washing operation. As the water level of the water storage tank is lowered, it is opened to the atmosphere, so when it is in a standby state and until the air suction port is opened to the atmosphere after the start of cleaning, it is caused by dirt in the bowl part of the toilet body. Odor is not released from the intake pipe via the air guide passage. Next, since the air introduction hole of the air introduction passage is located above the upper edge of the trap drainage channel inlet, the water level of the water in the bowl portion decreases and air is drawn into the trap drainage channel from the bowl portion. Immediately before the drainage, the discharge of the accumulated water in the air guide passage is completed and the atmosphere is introduced into the trap drainage channel from the air guide hole, so that the siphon action in the trap drainage channel is sufficiently reduced and the air suction force is weakened . As a result, when air is introduced from the bowl portion into the trap drainage channel and the siphon action ends, the siphon action has already been sufficiently reduced, so that the siphon sound (gobogobo sound) can be sufficiently reduced. .

In the present invention, preferably, the submerged length of the air suction port of the air guide passage is set so that the air suction port is opened to the atmosphere after the siphon action is generated after the start of the cleaning operation.
In the present invention configured as described above, since the air suction port is opened to the atmosphere after the start of the cleaning operation and before the occurrence of the siphon action, the siphon action can be effectively used.

In the present invention, preferably, the submerged length of the air suction port of the air introduction passage is such that the air suction port is opened to the atmosphere before the end after the siphon action is generated, and the water level of the bowl portion is in a standby state when the atmosphere is opened. It is set to be above the water level.
In the present invention configured as described above, the air suction port is opened to the atmosphere after the siphon action has occurred and before the end of the siphon operation (while the siphon is being generated), and the water level in the bowl portion is higher than the water level in the standby state when the atmosphere is released. Therefore, when the air is released to the atmosphere, the water level in the air guide passage that has been kept in the standby state is set to match the water level in the bowl portion above the water level in the standby state. Flows in and siphon action is weakened accordingly, which is effective for flush toilets with strong or too strong siphon action.

  In the present invention, preferably, the height of submergence of the air suction port of the air guide passage is such that the air suction port is opened to the atmosphere before the end after the siphon action is generated, and the water level of the bowl portion is in a standby state when the atmosphere is opened. It is set to be below the water level.

  In the present invention configured as described above, the air suction port is opened to the atmosphere after the siphon action is generated and before the end (while the siphon is being generated), and the water level of the bowl portion is lower than the water level in the standby state when the atmosphere is released. Therefore, when the air is released into the atmosphere, the water level in the air guide passage that has been kept in the standby state tries to match the water level in the bowl part below the water level in the standby state. As a result, it is possible to delay the introduction of air from the air passage into the trap drainage channel, so that the flush toilet that tends to be trapped in the trap drainage channel has a siphon effect. Siphon action can be used effectively without reduction.

  According to the flush toilet of the present invention, it is possible to prevent the odor from being scattered and to sufficiently reduce the siphon sound.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. First, a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view showing a flush toilet according to an embodiment of the present invention, FIG. 2 is a sectional view of the flush toilet as viewed along the line II-II in FIG. 1, and FIG. It is sectional drawing of the flush toilet seen along the -III line.

  The flush toilet 1 according to the present embodiment has a toilet body 2, the toilet body 2 is made of earthenware, a bowl portion 4 is formed at the front upper part of the toilet body 1, and washing water is stored at the rear upper part. A water storage tank 8 is formed. Further, a rim 5 is formed on the upper edge of the bowl portion 4, and the rim 5 has an overhanging shape inside. Between the water storage tank 8 and the bowl portion 4, a water conduit 8 for guiding the cleaning water in the water storage tank 8 to the bowl portion 4 is formed. The water conduit 8 is supplied with cleaning water through a water supply port 10 formed on the bottom surface of the water storage tank 6. Further, a rim spout 12 formed on the inner peripheral surface of the rim 5 of the toilet body 1 is formed on the downstream side of the water conduit 8, and the wash water from the water conduit 8 is supplied to the bowl portion 4 from the rim spout 12. It is designed to be washed with water.

A bowl discharge port 4a is formed at the bottom of the bowl portion 4, and a trap drain 14 for generating a siphon action is connected (communicated) to the rear side of the bowl discharge port 4a. The trap drainage channel 14 is composed of an inlet 14a, an ascending channel 14b extending upward from the inlet 14a, and a descending channel 14c descending. The descending path 14 c is connected to a water distribution pipe (not shown) through the drain socket 15. Further, the trap drainage channel 14 includes an upper top portion 14d and a lower top portion 14e.
As shown in FIG. 2, the water stored in the bowl portion 4 is at the initial water level L1 before the start of the cleaning operation.

  Next, the water storage tank 6 includes an operation lever 16, a ball tap 18 having a float (not shown), an overflow pipe 20, a refill pipe 22 that branches from the ball tap 18 and supplies cleaning water to the overflow pipe 20, a drain valve 24 is provided. When the user operates the operation lever 16, the drain valve 24 opens, the cleaning water in the water storage tank 6 is supplied to the water conduit 8 through the supply port 10, and the cleaning of the bowl portion 4 is started. At this time, when the float of the ball tap 18 is lowered, a water supply valve (not shown) of the ball tap 18 is opened, and water supply into the bowl portion 4 via the water storage tank 6, the refill pipe 22 and the overflow pipe 20 is performed. To be done.

  Next, the toilet body 1 of the flush toilet 1 according to the present embodiment includes an air guide passage 30. The air guide passage 30 includes an intake pipe 32 provided in the water storage tank 6 and an air guide chamber 36 that communicates with the air intake pipe 32 through an intake hole 34 formed in the bottom of the water storage tank 6. ing. The upper portion of the intake pipe 32 is U-shaped, and the tip thereof is an air suction port 38. The air suction port 38 is submerged in the cleaning water in the water storage tank 6 for a predetermined length H1 in the cleaning standby state, and is opened to the atmosphere as the water level of the water storage tank 6 decreases after the start of cleaning. It has become.

  The air guide chamber 36 of the air guide passage 30 is formed along the side surface and the upper surface of the trap drainage channel 14 of the toilet body 2. An air communication port 36 a is formed at a portion where the air guide chamber 36 changes from the side surface to the upper surface of the trap drainage channel 14. A slit-shaped air guide hole 40 is formed at the lower end of the air guide chamber 36. The air introduction hole 40 is located above the upper edge of the inlet 14 a of the trap drainage channel 14 by h, and further communicates with a portion slightly downstream from the inlet of the trap drainage channel 14.

  Next, the operation (operation) of the flush toilet according to this embodiment described above will be described with reference to FIGS. 4 is a cleaning mode 1 (initial state), FIG. 5 is a cleaning mode 2 (bowl water level rise), FIG. 6 is a cleaning mode 3 (air suction opening to the atmosphere), and FIG. 7 is a cleaning mode 4 (siphon action). FIG. 8 is a cross-sectional view of the flush toilet according to the present embodiment showing the cleaning mode 5 (immediately before the end of the siphon action) and FIG. 9 is the cleaning mode 6 (end of the siphon action).

  First, as shown in FIG. 4, in the cleaning mode 1 (initial state) before the start of the cleaning operation, the water level in the bowl portion 4 and the air introduction chamber 36 (air introduction passage 30) are at the same water level L1 in the initial state. It is in an equilibrium state.

  Next, as shown in FIG. 5, when the user operates the operation lever 16 to start the cleaning operation, the cleaning water in the water storage tank 6 flows from the rim spout 12 through the water conduit 8 to the bowl. Since water is discharged to the part 4, the cleaning mode 2 (the bowl part water level rises) is entered, and the water surface of the bowl part 4 rises. At this time, since the air suction port 38 of the intake pipe 32 is submerged, the air level of the air guide chamber 36 (air guide passage 30) is in the initial state because the air suction port 38 is cut off from the atmosphere. It does not change.

  Here, in the initial state before starting the cleaning operation (see FIG. 4) and the bowl portion water level rising state (see FIG. 5), the air suction port 38 of the intake pipe 32 is submerged in the water storage tank 6, so that the toilet bowl Odor due to dirt in the bowl portion 4 of the main body 2 is not released from the intake pipe 32 via the air guide chamber 36.

  Next, as shown in FIG. 6, when the water level of the water storage tank 6 is lowered and the air suction port 38 of the intake pipe 32 is opened to the atmosphere, the cleaning mode 3 (air suction port is opened to the atmosphere) is entered, and the air introduction chamber 36. The water level of the (air guide passage 30) rises to the water level of the bowl part 4.

  Next, as shown in FIG. 7, when the trap drain 14 is full and siphon action is started, the cleaning mode 4 (siphon action start) is entered, and the siphon action causes the cleaning water in the bowl portion 4 and the air guide chamber 36 to be washed. Wash water in the (air guide passage 30) is sucked into the trap drain 14 and the water level in the bowl portion 4 and the water level in the air guide chamber 36 (air guide passage 30) are lowered while maintaining substantially the same height.

  Next, the cleaning mode 5 shown in FIG. 8 (immediately before the end of the siphon action) is entered, and the air introduction hole 40 formed at the lower end of the air introduction chamber 36 (the air introduction passage 30) is more than the upper edge of the inlet 14a of the trap drain 14. Since it is located above h, the air sucked through the air suction port 38 is introduced prior to the air from the inlet 14 a of the trap drain 14 through the air introduction hole 40. Thereby, the siphon action in the trap drain 14 is sufficiently reduced, and the air suction force is weakened.

  Next, the cleaning mode 6 shown in FIG. 9 (siphon action end) is entered, and when the water level of the bowl portion 4 is further lowered to be equal to or lower than the upper edge of the inlet 14a of the trap drainage channel 14, the trap drainage channel 14 enters the inlet 14a. Air is introduced and the siphon action ends. At this time, since air has already been introduced into the trap drainage channel 14 from the air guide hole 40 and the siphon action has been sufficiently reduced, the siphoning sound (gobogobo sound) can be sufficiently reduced.

Next, a flush toilet according to a second embodiment of the present invention will be described with reference to FIG. FIG. 10 is a sectional view showing a flush toilet according to a second embodiment of the present invention.
The basic structure of the flush toilet according to the second embodiment is the same as that of the flush toilet according to the first embodiment shown in FIGS. 1 to 3, but the submerged length H2 of the intake pipe 32 of the air guide passage 30 is the first. It is longer than the submerged length H1 of one embodiment, and the air suction port 38 is opened to the atmosphere after the siphon action occurs.

  In the flush toilet according to the second embodiment, before the siphon action occurs, the air suction port 38 of the intake pipe 32 of the air guide passage 30 is not submerged and opened to the atmosphere. Therefore, in this state, the air guide chamber The water level 36 is maintained at the initial water level L1.

  In the flush toilet according to the second embodiment, as shown in FIG. 10, the submerged length H2 of the intake pipe 32 is before the end of the siphon action (before the siphon action) and the water level of the bowl portion 4 is in the initial state. The air intake port 38 of the intake pipe 32 is set to be open to the atmosphere when it is above the water level L1.

  In the flush toilet according to the second embodiment, when the air suction port 38 is opened to the atmosphere after the siphon action occurs and before the end of the siphon action (during the siphon action), the air introduction chamber 36 that has maintained the initial water level L1. Since the water level tries to match the water level of the bowl part 4 above the initial level L1, the washing water is drawn into the air guide chamber 36, and the suction force due to the siphon action is reduced accordingly. As a result, the first example in which the submergence length of the intake pipe 32 of the flush toilet is set long as H2 is effective for flush toilets with strong or too strong siphon action.

Next, referring to FIG. 11, a flush toilet according to a third embodiment of the present invention will be described. FIG. 11 is a cross-sectional view showing a flush toilet according to a third embodiment of the present invention.
The basic structure of the flush toilet according to the third embodiment is also the same as that of the flush toilet according to the first embodiment shown in FIGS. 1 to 3. Further, as in the second embodiment, after the siphon action occurs, the air Although the suction port 38 is opened to the atmosphere, the submerged length H3 of the intake pipe 32 of the air guide passage 30 is longer than the submerged length H2 of the second embodiment.

  Also in the flush toilet according to the third embodiment, the air suction port 38 of the intake pipe 32 of the air guide passage 30 is not submerged and opened to the atmosphere before the siphon action occurs, similarly to the second embodiment. Therefore, in this state, the water level of the air guide chamber 36 is maintained at the initial water level L1.

  In the flush toilet according to the third embodiment, as shown in FIG. 11, the water immersion length H3 of the intake pipe 32 is lower than the water level in the initial state L1 after the siphon action has occurred. Sometimes, the air suction port 38 of the intake pipe 32 is set to be opened to the atmosphere.

  In the flush toilet according to the third embodiment, when the air suction port 38 is opened to the atmosphere before the end of the siphoning operation (during the siphoning operation), the water level of the air introduction chamber 36 maintaining the initial water level L1 is changed. In order to match the water level of the bowl portion 4 below the water level L1 in the initial state, the washing water in the air guide chamber 36 is discharged, and the water level in the air guide chamber 36 is lowered. In the flush toilet of the second example, air is introduced into the trap drainage channel 14 from the air guide hole 40 of the air guide chamber 36 because of the time during which the water level of the air guide chamber 36 falls from the water level L1 in the standby state. Will be delayed.

On the other hand, when it is assumed that a large amount of filth is used, such as public toilets, the filth frequently passes through the trap drainage channel, so the trap drainage channel is introduced before sucking water from the bowl. It is not preferable that air is introduced from the air chamber to reduce the siphon action.
In the flush toilet according to the third embodiment, since the timing at which air is introduced into the trap drainage channel 14 from the air introduction hole 40 of the air introduction chamber 36 is delayed, this problem can be solved.

  In both the second embodiment and the third embodiment described above, immediately before the siphon action ends, the air from the air introduction hole 40 of the air introduction chamber 36 (air introduction passage 30) precedes the air from the inlet 14a of the trap drainage passage 14. Thus, the siphon action in the trap drain 14 is sufficiently reduced, and the air suction force is weakened. Therefore, when air is introduced from the inlet 14a of the trap drain 14 and the siphon action is finished, the siphon action has already been sufficiently reduced, so that the siphon sound (gobogobo sound) can be sufficiently reduced. .

It is a top view which shows the flush toilet bowl by embodiment of this invention. It is sectional drawing of the flush toilet seen along the II-II line of FIG. It is sectional drawing of the flush toilet seen along the III-III line of FIG. It is sectional drawing which shows the washing mode 1 (initial state) of the flush toilet according to 1st Embodiment of this invention. It is sectional drawing which shows the cleaning mode 2 (bowl part water level rise) by 1st Embodiment of this invention. It is sectional drawing which shows the washing | cleaning mode 3 (air suction inlet atmosphere opening | release) by 1st Embodiment of this invention. It is sectional drawing which shows the cleaning mode 4 (siphon action start) by 1st Embodiment of this invention. It is sectional drawing which shows the cleaning mode 5 (just before completion | finish of a siphon effect | action) by 1st Embodiment of this invention. It is sectional drawing which shows the cleaning mode 6 (siphon action end) by 1st Embodiment of this invention. It is sectional drawing which shows the flush toilet bowl by 2nd Embodiment of this invention. It is sectional drawing which shows the flush toilet bowl by 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Bowl part 6 Water storage tank 8 Water supply channel 10 Water supply port 12 Rim water discharge port 14 Trap drainage channel 14a Inlet 30 Air intake channel 32 Intake pipe 34 Inlet port 36 Air guide chamber 38 Air inlet port 40 Air guide mouth

Claims (4)

A flush toilet that flushes the bowl portion of the toilet body with wash water supplied from a water storage tank and discharges the accumulated water in the bowl portion by siphon action,
A water conduit formed to guide the wash water from the water storage tank to the bowl portion of the toilet body,
A trap drain that is connected to the bowl outlet and generates a siphon action;
An air introduction hole is formed at one end above the upper edge of the inlet of the trap drainage channel and communicates with the trap drainage channel, and the other end is submerged by a predetermined height in the wash water in the water storage tank in the standby state. And an air intake passage formed with an air inlet that is opened to the atmosphere as the water level of the water storage tank decreases after the start of the cleaning operation.
The air guide passage has accumulated water in a standby state, and the water stored in the air guide passage is discharged from the air guide hole to the trap drainage channel by a siphon action, and the level of the water stored in the bowl portion is further increased. The structure is such that the discharge of the accumulated water in the air guide passage is completed immediately before air is drawn into the trap drainage channel from the bowl portion, and the atmosphere is introduced into the trap drainage channel from the air guide hole. A flush toilet, characterized by being.   2. The flush toilet according to claim 1, wherein a water submergence length of the air suction port of the air introduction passage is set so that the air suction port is opened to the atmosphere after the start of the washing operation and before the siphon action is generated.   The submerged length of the air intake port of the air guide passage is such that the air intake port is opened to the atmosphere before the end after the siphon action occurs, and the water level of the bowl portion is higher than the water level in the standby state when the atmosphere is released. 2. The flush toilet according to claim 1, wherein the flush toilet is set to be.   The submerged length of the air intake port of the air introduction passage is such that the air intake port is opened to the atmosphere before the end after the siphon action is generated, and the water level of the bowl portion is lower than the standby level when the atmosphere is released. 2. The flush toilet according to claim 1, wherein the flush toilet is set to be.

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