JP4925876B2 - Toilet drainage intake system - Google Patents

Description

  The present invention relates to a suction device for a toilet drainage channel.

  FIG. 1 of Patent Document 1 discloses a conventional toilet drainage intake device. This intake device sucks air from a toilet drainage channel connected to the downstream side of the water seal portion of the toilet body. The intake device is provided in a water supply pipe or a bypass pipe for supplying cleaning water to the toilet bowl, and includes an ejector that generates a negative pressure, and a suction tank connected between the ejector and the toilet drainage channel. Yes. The inside of the suction tank is partitioned into an outer side of the bellows (first chamber) and an inner side of the bellows (second chamber). The first chamber is connected to the ejector, and the second chamber is connected to the toilet drainage channel.

  In the conventional toilet drainage intake device having such a configuration, a certain amount of air corresponding to the internal volume of the bellows, which is increased by the extension of the bellows, is sucked from the toilet drainage channel. For this reason, a siphon action can be generated stably in the toilet drainage channel. In addition, there is an effect that air containing odor in the toilet drainage channel is not dissipated upstream from the bellows.

  When the supply of the washing water to the toilet bowl is completed, the ejector communicates with the atmosphere, and the first chamber of the suction tank becomes atmospheric pressure. As a result, the bellows that has been stretched due to the negative pressure in the first chamber is reduced, and a preparation state for the next toilet bowl cleaning is obtained.

JP-A-7-54388

  However, in the above conventional toilet drainage intake device, the amount of air sucked into the suction tank is the difference in internal volume between when the bellows is contracted and extended, and the internal volume of the suction tank can be fully utilized. Can not. Further, since a space for storing the bellows is required inside the suction tank, the suction tank has to be enlarged in order to obtain a necessary amount of suction, and the intake device becomes large.

  In addition, when communicating the bellows housed in the suction tank and the toilet drainage channel, airtightness must be ensured at each connection portion of the suction tank, bellows and toilet drainage channel, the structure becomes complicated, It takes time to assemble. On the other hand, when the airtightness of the suction tank and the bellows is impaired, the suction of air from the toilet drainage channel becomes insufficient, and the generation of the siphon action becomes unstable. As a result, toilet cleaning may not be performed well.

  The present invention has been made in view of the above-described conventional circumstances, and can be downsized, can be easily assembled with a simple structure, can reliably generate siphon action, and can perform toilet cleaning satisfactorily. Providing an air intake device for a toilet drainage channel is a problem to be solved.

The intake device of the toilet drainage channel according to the present invention is an intake device for a toilet drainage channel that sucks air from a toilet drainage channel connected to the downstream side of the water seal portion of the toilet body,
A negative pressure generator, and a suction tank connected between the negative pressure generator and the toilet drainage channel,
The suction tank includes a lower case formed with a lower opening communicating with the toilet drainage channel, an upper case formed with an upper opening communicating with the negative pressure generator, a flat portion formed flat, and the It has a lower convex part that protrudes downward from the flat part at the time of installation , is sandwiched between the lower case and the upper case in a sealed state, and is movable in the vertical direction at the time of installation so that the interior is first. It consists of a diaphragm partitioning into a chamber and a second chamber.

  In the toilet drainage intake device of the present invention having such a configuration, a space for accommodating the diaphragm is less than that of the bellows, and most of the internal volume of the suction tank is used for air suction. be able to.

  Further, by sandwiching the diaphragm between the lower case and the upper case in a sealed state, the first chamber and the second chamber are surely partitioned in an airtight state. For this reason, the suction of air from the toilet drainage channel can be reliably performed.

  Therefore, the air intake device for the toilet drainage channel according to the present invention can be reduced in size and can be easily assembled with a simple structure, and the siphon action can be reliably generated and the toilet bowl can be washed well.

In the intake device of the present invention, various devices can be employed as the negative pressure generating device as long as it can generate a negative pressure. For example, a pump or the like can be employed in addition to an ejector that generates negative pressure by supplying cleaning water.

In an intake device of the toilet drainage channel of the present invention, the diaphragm is that Yusuke a flat portion which is formed flat, and a lower protrusion protruding downward at the time of installation from the plane portion.

  In this case, the plane portion moves in the vertical direction during installation in the suction tank. When the flat portion is lowered, the lower convex portion makes point contact with the lower inner wall surface of the lower case of the suction tank. That is, since the entire lower surface of the flat portion does not contact the lower inner wall surface of the lower case, it is possible to prevent the lower surface of the flat portion and the lower inner wall surface of the lower case from being in a vacuum state and sticking. For this reason, since the plane portion can easily rise from the lower inner wall surface of the lower case, air can be reliably sucked from the toilet drainage channel.

The intake device of the toilet drainage channel according to the present invention is an intake device for a toilet drainage channel that sucks air from a toilet drainage channel connected to the downstream side of the water seal portion of the toilet body,
A negative pressure generator, and a suction tank connected between the negative pressure generator and the toilet drainage channel,
The suction tank includes a lower case formed with a lower opening communicating with the toilet drainage channel, an upper case formed with an upper opening communicating with the negative pressure generator, a flat portion formed flat, and the It has an upper convex part that protrudes upward from the flat part during installation, is sandwiched between the lower case and the upper case in a sealed state, and is movable in the vertical direction at the time of installation, so that the first inside It consists of a diaphragm partitioning into a chamber and a second chamber.

  Also in this case, the plane portion moves in the vertical direction at the time of installation inside the suction tank. When the flat portion rises, the upper convex portion makes point contact with the upper inner wall surface of the upper case. That is, since the entire upper surface of the flat portion does not contact the upper inner wall surface of the upper case, it is possible to prevent the upper surface of the flat portion and the upper inner wall surface of the upper case from being in a vacuum state and sticking. For this reason, the plane part can easily descend from the upper inner wall surface of the upper case, and air can be sucked from the toilet drainage channel at the time of the next toilet flushing.

  Moreover, when providing a weight on the upper surface of a plane part, the plane part raises and the sound which a weight hits on the upper inner wall surface of an upper case can be suppressed by an upper convex part.

  In the toilet drainage intake device of the present invention, it is preferable that at least one of the inner wall surface of the suction tank and the surface of the diaphragm is a rough surface. In this case, it can be prevented that the inner wall surface of the suction tank and the diaphragm are stuck in a vacuum state. Moreover, when the surface of a diaphragm is a rough surface, it can also prevent that between the overlapping diaphragms becomes a vacuum state and sticks. For this reason, a plane part can move to an up-down direction easily, and can attract | suck the air from a toilet drainage channel reliably.

  In the toilet drainage intake device of the present invention, it is preferable that a lower opening is formed in the lowermost part of the lower case. In this case, even if wash water containing filth is sucked into the second chamber from the toilet drainage channel, the wash water flows down toward the lower opening, and passes through the lower chamber from the second chamber to the toilet drainage channel. Can be discharged well.

  In the toilet drainage intake device of the present invention, the lower case is composed of a bottom wall and a peripheral wall rising from the peripheral edge of the bottom wall, and a groove communicating with the lower opening is recessed in the upper surface of the bottom wall. preferable. In this case, even if cleaning water containing filth is sucked into the second chamber from the toilet drainage channel, the cleaning water is collected in the groove, flows down toward the lower opening, and passes through the lower opening to the second chamber. Can be better discharged to the toilet drainage channel.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment in which a toilet drainage intake device of the present invention is embodied as a Western style flush toilet will be described with reference to the drawings.

  As shown in FIG. 1, the Western style flush toilet includes a toilet body 1 and a toilet cleaning device 100. Illustration of the toilet seat and toilet lid is omitted.

  The toilet body 1 has a rim 3 on the upper inner periphery of the toilet bowl 2. The toilet body 1 is formed with an ascending channel extending upward from the lower end of the toilet bowl 2, and a water seal 4 is formed below the toilet bowl 2.

  As shown in FIG. 3, the toilet body 1 has a toilet drainage pipe 150 that forms an ascending flow path and opens rearward. A connecting pipe 151 and a drain connecting pipe 8 are connected to the downstream side of the toilet drain pipe 150.

  The downstream end of the toilet drainage pipe 150 is inserted into the upstream end opening of the connection pipe 151 via the packing 150p. The downstream end of the connection pipe 151 is inserted into the upstream end opening of the drainage connection pipe 8 via the packing 8p. The drainage connection pipe 8 is formed in a shape that is wound around a tuna, and has a staying portion 6 where washing water stays in the middle and seals the upstream side and the downstream side. The drainage connection pipe 8 is fitted into the upstream end opening and has an orifice member 8a for reducing the pipe diameter. The drainage flow path 5 is formed by the toilet drainage pipe 150, the connection pipe 151, and the drainage connection pipe 8, and the downstream side of the water seal part 4 and the upstream side of the retention part 6.

  The drainage connection pipe 8 is connected to a floor drainage connection member 9, and the floor drainage connection member 9 is connected to a floor drainage pipe 300 raised from the floor surface. In this way, the drain outlet 7 at the lower end of the drain connection pipe 8 communicates with the floor drain pipe 300. The floor drainage connection member 9 has a support portion 9 a that supports the staying portion 6 of the drainage connection pipe 8. Further, the toilet body 1 has a storage portion 1S surrounded by a side wall 1W behind the toilet bowl 2.

  As shown in FIG. 1, the toilet cleaning device 100 includes a cleaning water supply device and an intake device 200 for the toilet drainage channel 5.

  The cleaning water supply device includes a water conduit 10 connected to the water pipe and a first on-off valve V1 that opens and closes the water conduit 10.

  The water conduit 10 communicates with a water tap stopcock V5 drawn from the floor or wall surface of the toilet room where the toilet body 1 is installed. Further, a strainer device 11 incorporating a water stop valve and a strainer and a constant flow valve 12 are provided on the upstream side of the first on-off valve V1, and a vacuum cube breaker 13 is provided on the downstream side.

  Further, the inlet 31 of the ejector 30 is connected to the water conduit 10 downstream of the vacuum breaker 13. An inlet 21 of the tank 20 is connected to the outlet 32 of the ejector 30, and the tank 20 can discharge the stored washing water from the outlet 22.

  The tank 20 includes an inflow chamber 25 that communicates with the inflow port 21, and an outflow chamber 26 that communicates with the inflow chamber 25 at the bottom and communicates with the outflow port 22. An air inlet 23 is provided in the inflow chamber 25, and a second on-off valve V <b> 2 is connected thereto. The inflow chamber 25 has a swirl chamber 29 in which washing water is discharged from a nozzle 50 communicating with the outlet 32 of the ejector 30 to form a swirling flow. A delivery pipe 40 extending to the rim 3 of the toilet body 1 is connected to the outlet 22.

  The ejector 30 has an intake port 33 communicating with the outside. The intake port 33 sucks air by deriving cleaning water from the deriving port 32.

  The intake device 200 of the toilet drainage channel 5 includes a negative pressure generator 201 and a suction tank 80.

  The negative pressure generator 201 has an ejector 30 and a negative pressure accumulator tank 70. The intake port 33 of the ejector 30 is connected to a negative pressure accumulating tank 70 that accumulates a negative pressure via a first pressure guiding pipe 110 provided with a check valve 111.

  A third on-off valve V3 is provided midway from the check valve 111 to the first pressure guiding pipe 110 from the negative pressure accumulating tank 70, and a second pressure guiding pipe 120 communicating with the outside is branched. The first pressure guiding pipe 110 is provided with a fourth on-off valve V4 in the middle, and a third pressure guiding pipe 130 communicating with the suction tank 80 is branched.

  The inside of the suction tank 80 is partitioned into a first chamber 81 and a second chamber 82 by a diaphragm 83 that can move in the vertical direction. The first chamber 81 is connected to the third pressure guiding tube 130, and the second chamber 82 is connected to the toilet drainage channel 5 by the suction tube 90.

  As shown in FIG. 2, the opening / closing timing and the opening / closing time of the first opening / closing valve V 1, the second opening / closing valve V 2, the third opening / closing valve V 3, and the fourth opening / closing valve V 4 are controlled by the control device C. Since the second on-off valve V2, the third on-off valve V3, and the fourth on-off valve V4 are air on-off valves, the second on-off valve V2, the third on-off valve V3, and the fourth on-off valve V4 are made smaller than the water on-off valve and can be opened and closed with a small force. It is like that.

  The suction tank 80 which is a characteristic configuration of this embodiment will be described in more detail. As shown in FIG. 4, the suction tank 80 has a pan-like lower case 84, a lid-like upper case 85, and a diaphragm 83. As shown in FIG. 5, the outer casing of the suction tank 80 is formed by the lower case 84 and the upper case 85. As shown in FIG. 4, the first chamber 81 and the second chamber 81 are separated by a diaphragm 83 that can move in the vertical direction. It is partitioned into a chamber 82.

  Since the diaphragm 83 requires less space for storage than the bellows, most of the internal volume of the suction tank 80 having the outer case formed by the lower case 84 and the upper case 85 is used for air suction. it can. For this reason, the suction tank 80 can be reduced in size.

  As shown in FIGS. 4 and 6-8, the lower case 84 has a circular bottom wall 84a and a peripheral wall 84d that rises from the periphery of the bottom wall 84a. At the lowermost part of the lower inner wall surface 84m of the bottom wall 84a, a lower opening 84b and an insertion pipe 84c that communicates with the lower opening 84b and protrudes downward are formed. In addition, a plurality of grooves 84e that communicate from the outer periphery of the bottom wall 84a to the lower opening 84b are radially formed in the lower inner wall surface 84m of the bottom wall 84a.

  For this reason, even if cleaning water containing filth is sucked into the second chamber 82 from the toilet drainage channel 5, the cleaning water is collected in the groove 84e, flows down toward the lower opening 84b, and flows into the lower opening 84b. It is possible to discharge the second chamber 82 from the second chamber 82 to the toilet drainage channel 5 satisfactorily.

  The inner surface of the lower case 84 is roughened. For this reason, when the diaphragm 83 comes into contact with the inner surface of the lower case 84, it can be prevented that the diaphragm 83 is in a vacuum state and stuck, so that the flat portion 83 a of the diaphragm 83 can easily move up and down. The air can be sucked from the toilet drainage channel 5 more reliably.

  A flange 84f having a plurality of through holes 84g through which the respective bolts 87b are inserted is formed on the upper outer peripheral surface of the peripheral wall 84d.

  As shown in FIGS. 4 to 6 and FIG. 9, the upper case 85 has a curved shape that swells upward, and a plurality of ribs 85d extending radially from the center are formed on the upper inner wall surface 85m. . The upper case 85 has an upper opening 85a and a pressure communication pipe 85b communicating with the upper opening 85a. A flange 85f having a plurality of through holes 85g through which the bolts 87b are inserted is formed on the outer peripheral surface of the upper case 85. The pressure communication tube 85 b of the upper case 85 is connected to the third pressure tube 130, and the upper opening 85 a is connected to the negative pressure generator 201.

  The inner surface of the upper case 85 is roughened. For this reason, when the diaphragm 83 comes into contact with the inner surface of the upper case 85, it can be prevented that the diaphragm 83 is in a vacuum state and stuck, so that the flat portion 83a of the diaphragm 83 can be easily lowered, Air can be sucked from the toilet drainage channel 5 at the time of the next toilet cleaning.

  As shown in FIGS. 6, 10, and 11, the diaphragm 83 is made of rubber, and has a flat circular portion 83 a that is flat, a flexible peripheral membrane 83 b that rises from the periphery of the flat portion 83 a, A flange 83c that extends radially outward from the upper end of the film 83b and a mounting piece 83d that is bent downward and extended from the periphery of the flange 83c. The peripheral film 83b has a substantially cylindrical shape with a lower portion swelled.

  The flat portion 83a is formed with a circular concavity 83i concentric with the flat portion 83a, and a protrusion 83g having an enlarged tip at the center is integrally formed. Further, three locking pieces 83h protruding inward from the upper inner peripheral surface of the outer peripheral wall 83w of the circular recess 83i are formed integrally with the flat portion 83a. The protrusion 83g and each locking piece 83h are also made of rubber and have flexibility.

  The diaphragm 83 has a circular flat plate weight 86 fitted into the circular recess 83i of the flat surface portion 83a. The weight 86 is made of metal and has an opening 86a at the center. The weight 86 is fitted into the circular recess 83i by deforming the locking piece 83h while inserting the protrusion 83g into the opening 86a. The weight 86 is not disengaged from the circular concave portion 83i because the opening 86a is locked to the enlarged tip of the projection 83g and the peripheral edge is locked to each locking piece 83h.

  As shown in FIG. 6, on the lower surface of the flange 84f of the lower case 84, a ring-shaped reinforcing metal fitting 87d having a plurality of screw holes 87h screwed to the respective bolts 87b is disposed. A ring-shaped reinforcing metal fitting 87u having a plurality of through holes 87g through which the bolts 87b are inserted is also arranged on the upper surface of the flange 85f of the upper case 85. As shown in FIGS. 4 and 12, the attachment piece 83 d of the diaphragm 83 is sandwiched between the flange 84 f of the lower case 84 and the flange 85 f of the upper case 85 in a sealed state. The bolts 87b are inserted into the through holes 87g, 85g, and 84g from above and screwed into the screw holes 87h of the reinforcing metal fitting 87d, whereby the flange 84f of the lower case 84, the attachment piece 83d of the diaphragm 83, and the upper case 85. The flange 85f is fastened and fixed.

  Since the diaphragm 83 is sandwiched between the lower case 84 and the upper case 85, the first chamber and the second chamber are reliably partitioned in an airtight state. Therefore, the diaphragm 83, the lower case 84, and the upper case 85 can be easily assembled with a simple structure, and air can be reliably sucked from the toilet drainage channel 5 by the suction tank 80 assembled in this way. it can.

  As shown in FIGS. 4 and 12, the flange 83 c of the diaphragm 83 is fixed so as to contact the upper inner wall surface 85 m of the upper case 85. As shown in FIG. 10, the flat portion 83a of the diaphragm 83 has six downward convex portions 83e that are arranged at equal intervals on the lower surface inside the periphery and project downward. Further, the flat portion 83a of the diaphragm 83 has six upper convex portions 83f that are arranged at equal intervals on the upper surface inside the periphery and project upward. As shown in FIG. 11A, in the diaphragm 83, the lower protrusion 83e is in point contact with the lower inner wall surface 84m of the bottom wall 84a of the lower case 84 in the lowered position, and as shown in FIG. In the raised position, the upper protrusion 83f makes point contact with the upper inner wall surface 85m or the rib 85d of the upper case 85.

  For this reason, the flat portion 83a of the diaphragm 83 moves between the upper inner wall surface 85m of the upper case 85 and the lower inner wall surface 84m of the bottom wall 84a of the lower case 84, and the first chamber 81 and the second chamber The volume fluctuation amount 82 can be brought close to the internal volume of the suction tank 80. For this reason, the space inside the suction tank 80 is effectively used, and the suction tank 80 can be downsized.

  In addition, the entire bottom surface or top surface of the flat surface portion 83a of the diaphragm 83 is not in contact with the lower inner wall surface 84m of the bottom wall 84a or the upper inner wall surface 85m of the upper case 85 by the lower convex portion 83e or the upper convex portion 83f. It can be prevented that the space between the two becomes a vacuum state and sticks. For this reason, the plane portion 83a can easily rise from the lower inner wall surface 84m of the bottom wall 84a, and air can be reliably sucked from the toilet drainage channel 5. Moreover, it can fall easily from the upper inner wall surface 85m of the upper case 85, and air can be sucked from the toilet drainage channel 5 at the time of the next toilet cleaning.

  Further, since the weight 86 does not contact the upper inner wall surface 85m of the upper case 85 by the upper convex portion 83f, it is possible to suppress the sound that the weight 86 hits the upper inner wall surface 85m.

  Further, since the surfaces of the flat portion 83a and the peripheral film 83b of the diaphragm 83 are roughened, the inner surface of the lower case 84 and the upper case 85 and the diaphragm 83 are further stuck in a vacuum state. Can be prevented. In addition, it is possible to prevent the overlapping between the overlapping diaphragms 83 from being in a vacuum state. For this reason, the plane part 83a of the diaphragm 83 can move up and down reliably, and air can be sucked from the toilet drainage channel 5 more reliably.

  As shown in FIG. 4, the insertion tube 84c provided in the lower part of the lower case 84 is inserted through the packing 90p into the communication port 90a of the branch communication tube 90 branched from the connection tube 151 shown in FIG. For this reason, the second chamber 82 of the suction tank 80 and the toilet drainage channel 5 can be easily communicated while ensuring airtightness.

  In the above Western-style flush toilet, the air intake device 200 of the toilet drainage channel 5 includes the ejector 30, the first pressure guiding pipe 110, the check valve 111, the negative pressure accumulating tank 70, the second pressure guiding pipe 120, the third on-off valve V3, The third pressure guiding pipe 130, the fourth on-off valve V4, the suction tank 80, the suction pipe 90, and the control device C are configured. The washing water supply device includes a water conduit 10, a strainer 11, a constant flow valve 12, a first on-off valve V1, a vacuum breaker 13, an ejector 30, a nozzle 50, a tank 20, a second on-off valve V2, a delivery pipe 40, a first. The first pressure guiding pipe 110, the second pressure guiding pipe 120, the third on-off valve V3, and the control device C are included.

  Next, the operation of the toilet bowl cleaning device 100 incorporating the intake device 200 of the present invention will be described based on the configuration shown in FIG.

[When not washed]
In FIG. 13, the first on-off valve V1, the second on-off valve V2, the third on-off valve V3, and the fourth on-off valve V4 are closed during non-cleaning before the time point t1. In this state, cleaning water is stored in the tank 20. The diaphragm 83 in the suction tank 80 is in contact with the lower inner wall surface 84 m in the suction tank 80.

[Toilet bowl washing process, negative pressure accumulation process]
After the stool, the first on-off valve V1 is opened by the control device C when the user operates a cleaning switch that transmits a toilet cleaning start signal to the control device C at time t1 in FIG.

  As a result, the wash water flowing in the water conduit 10 flows into the swirl chamber 29 through the ejector 30. As the washing water flows into the ejector 30, the ejector 30 sucks the air in the negative pressure accumulating tank 70 through the first pressure guiding pipe 110 and the check valve 111, and the sucked air together with the washing water turns into the swirl chamber 29. Flows in. Since the wash water swirls in the swirl chamber 29, the air in the wash water is well separated and accumulated in the upper part of the inflow chamber 25. As a result, the negative pressure is gradually accumulated in the negative pressure accumulator tank 70, and the water surface of the inflow chamber 25 is gradually lowered by the amount of air sucked from the negative pressure accumulator tank 70.

  Further, the cleaning water supplied from the water conduit 10 and the amount of cleaning water stored in the tank 20 and corresponding to the air sucked from the negative pressure accumulating tank 70 are supplied to the rim 3 via the delivery pipe 40. . The wash water supplied to the rim 3 flows down while turning along the inner surface of the toilet bowl 2, and a swirling flow is formed in the toilet bowl 2. By this swirling flow, the filth is collected in the center of the toilet bowl 2. The swirling flow causes the paper to loosen and become familiar with the washing water and be dispersed in the washing water.

[Intake stroke]
At time t2 in FIG. 13, the control device C opens the fourth on-off valve V4. As a result, the negative pressure in the negative pressure accumulating tank 70 is transmitted to the first chamber 81 of the suction tank 80 via the first pressure guiding pipe 110, the third pressure guiding pipe 130, and the fourth on-off valve V4. Becomes negative pressure. Further, since the cleaning water is continuously supplied into the ejector 30, the air in the first chamber 81 is also sucked by the ejector 30. Thereby, the diaphragm 83 in the suction tank 80 is rapidly pulled up by the negative pressure in the negative pressure accumulating tank 70 when the fourth on-off valve V4 is opened. It is gently lifted until it abuts against the wall surface 85m.

  When the air in the toilet drainage channel 5 is sucked into the second chamber 82 by the suction tank 80, the water level in the toilet bowl 2 is sufficiently high by the wash water supplied from the rim 3, and the water seal 4 The water head difference from the highest portion 4a is sufficiently large. For this reason, the wash water in the toilet bowl 2 has a strong siphon action due to the water head difference and the suction of the air in the toilet drainage channel 5 so that the toilet drainage channel 5 is quickly filled with the wash water. In addition, the discharge flow is formed early with less washing water.

  At this time, the filth collected in the center of the toilet bowl 2 by the swirling flow formed in the toilet bowl 2 is surely transferred to the toilet drainage path 5 along with the wash water drained to the toilet drainage path 5 by siphon action. Discharged.

  Further, the toilet drainage channel 5 is sealed from the downstream side by the staying portion 6, and the toilet drainage channel 5 is a closed space existing between the water sealing portion 4 and the staying portion 6. For this reason, since a certain amount of air can be reliably sucked from the toilet drainage channel 5, the siphon action can be stably generated.

  Further, the suction tank 80 is partitioned into a first chamber 81 and a second chamber 82 by a diaphragm 83, and only the second chamber 82 communicates with the toilet drainage channel 5. The contained air or the like is reliably prevented from entering the negative pressure accumulating tank 70 or the ejector 30 side.

[Washing water increase process]
At time t3 in FIG. 13, the water level of the toilet bowl 2 has dropped to the vicinity of the height of the lowest part 2a at the rear of the toilet bowl 2, and at this moment, the control device C opens the third on-off valve V3, The fourth on-off valve V4 is closed.

  At this time, since the cleaning water is still supplied into the ejector 30, a large amount of external air flows into the swirl chamber 29 through the third on-off valve V 3, the second pressure guiding pipe 120, and the first pressure guiding pipe 110. . For this reason, the washing water in the inflow chamber 25 is pushed out to the rim 3 through the outflow chamber 26 and the delivery pipe 40 by a large amount of air that has flowed in. As a result, the water level in the inflow chamber 25 is drastically lowered.

  Washing thus supplied to the rim 3 before the water level in the toilet bowl 2 becomes lower than the lowest part 2a at the rear of the toilet bowl 2 and air flows into the toilet drainage channel 5 from the toilet bowl 2 and the siphon action ends. Water increases. That is, the wash water supplied from the rim 3 is the sum of the wash water supplied from the water conduit 10 and the wash water stored in the tank 20, so that the toilet bowl 2 is washed per unit time. The amount of water supplied is increasing. For this reason, the water sealing part 4 does not break, the washing water in the toilet bowl 2 continues to turn, and the siphon action also continues. Further, the swirl flow in the toilet bowl 2 is also strong. In addition, the wash water flow increases. For this reason, the filth remaining in the toilet bowl 2 is more reliably discharged by being pushed into the toilet drainage channel 5.

[Returning process of diaphragm]
At time t4 in FIG. 13, the control device C closes the first on-off valve V1, and opens the fourth on-off valve V4. Thereby, the first chamber 81 of the suction tank 80 communicates with the outside via the fourth on-off valve V4, the third pressure guiding pipe 130, the first pressure guiding pipe 110, the second pressure guiding pipe 120, and the third on-off valve V3. The inside of the first chamber 81 becomes atmospheric pressure, and the diaphragm 83 descends. For this reason, since air is gradually pushed into the toilet drainage channel 5 from the second chamber 82 and the air gradually increases in the toilet drainage channel 5, the toilet drainage channel 5 can be maintained in a state where the flush water is full. The siphon action ends.

[Water-covering process]
At time t5 in FIG. 13, the control device C opens the first on-off valve V1 and the second on-off valve V2, and closes the fourth on-off valve V4. Accordingly, the cleaning water flows into the swirl chamber 29 while the ejector 30 sucks air from the outside. The air in the wash water is well separated in the swirl chamber 29 and is released to the outside through the atmosphere port 23 and the second on-off valve V2. For this reason, the wash water in the tank 20 is accumulated up to a predetermined water level before the start of washing. In addition, wash water is supplied from the outflow chamber 26 to the rim 3 through the delivery pipe 40, and the wash water accumulates in the toilet bowl 2 and covers it.

[Air release process]
At time t6 in FIG. 13, the first on-off valve V1 is closed by the control device C, and the fourth on-off valve V4 is opened. Thereby, the first chamber 81 of the suction tank 80 communicates with the outside again through the fourth on-off valve V4, the third pressure guiding pipe 130, the first pressure guiding pipe 110, the second pressure guiding pipe 120, and the third on-off valve V3. The diaphragm 83 is lowered until it contacts the lower inner wall surface 84m of the suction tank 80. As a result, the diaphragm 83 is returned to the predetermined position before the cleaning, and the next cleaning can be performed stably. Thereafter, at time t7 in FIG. 13, the control device C closes the second on-off valve V2, the third on-off valve V3, and the fourth on-off valve V4.

  Therefore, the air intake device 200 of the toilet drainage channel 5 of the embodiment can be reduced in size and can be easily assembled with a simple structure, and the siphon action can be reliably generated and the toilet bowl can be washed well.

  The present invention is applicable to a toilet bowl cleaning device.

It is a schematic diagram of a Western style flush toilet equipped with an air intake device for a toilet drainage channel of an embodiment. It is a schematic diagram which shows the control apparatus of the washing water supply apparatus of an Example. It is principal part sectional drawing of the Western-style flush toilet bowl provided with the suction device of the toilet drainage channel of the Example. It is sectional drawing of the suction tank of an Example. It is a perspective view of the suction tank of an Example. It is an exploded sectional view of the suction tank of an example. It is sectional drawing of the lower case which comprises the suction tank of an Example. It is a top view of the lower case which comprises the suction tank of an Example. It is a bottom view of the upper case which comprises the suction tank of an Example. It is a top view of the diaphragm which comprises the suction tank of an Example. 6A is a partial cross-sectional view taken along the line AA in FIG. 6, and FIG. 6A is a view when the diaphragm is located at the lowered position, and FIG. 6B is a view when the diaphragm is located at the raised position. It is a partially expanded sectional view of the suction tank of an Example. It is a timing chart explaining the action | operation of the western style flush toilet of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Toilet body 4 ... Water seal part 5 ... Toilet drainage channel 80 ... Suction tank 81 ... 1st chamber 82 ... 2nd chamber 83 ... Diaphragm 84 ... Lower case 84b ... Lower case 85 ... Upper case 85a ... Upper opening 86 ... Weight 200 ... Intake device 201 ... Negative pressure generator

Claims (4)

In the intake device of the toilet drainage channel that sucks air from the toilet drainage channel connected to the downstream side of the water seal part of the toilet body,
A negative pressure generator, and a suction tank connected between the negative pressure generator and the toilet drainage channel,
The suction tank includes a lower case formed with a lower opening communicating with the toilet drainage channel, an upper case formed with an upper opening communicating with the negative pressure generator, a flat portion formed flat, and the It has a lower convex part that protrudes downward from the flat part at the time of installation , is sandwiched between the lower case and the upper case in a sealed state, and is movable in the vertical direction at the time of installation so that the interior is first. A suction device for a toilet drainage channel, comprising a diaphragm partitioning into a chamber and a second chamber. In the intake device of the toilet drainage channel that sucks air from the toilet drainage channel connected to the downstream side of the water seal part of the toilet body,
A negative pressure generator, and a suction tank connected between the negative pressure generator and the toilet drainage channel,
The suction tank includes a lower case formed with a lower opening communicating with the toilet drainage channel, an upper case formed with an upper opening communicating with the negative pressure generator, a flat portion formed flat, and the It has an upper convex part that protrudes upward from the flat part during installation, is sandwiched between the lower case and the upper case in a sealed state, and is movable in the vertical direction at the time of installation, so that the first inside A suction device for a toilet drainage channel, comprising a diaphragm partitioning into a chamber and a second chamber . The air suction device for a toilet drainage channel according to claim 1 or 2, wherein at least one of an inner surface of the suction tank and a surface of the diaphragm is a rough surface . The lower case includes a bottom wall and a peripheral wall that rises from a peripheral edge of the bottom wall. The lower opening is formed at a lowermost portion, and a groove that communicates with the lower opening is formed in the upper surface of the bottom wall. The toilet device drainage intake device according to any one of claims 1 to 3 .

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