JP4793019B2 - Toilet bowl cleaning device and cleaning method - Google Patents

Description

  The present invention relates to a toilet cleaning device having an ejector that sucks and exhausts air in a drainage channel, and a cleaning method using the device.

  Early siphon formation by exhausting air from the first trap part connected to the lower part of the toilet bowl, the second trap part downstream of the first trap part, and between the first trap part and the second trap part during toilet cleaning Japanese Patent Laid-Open No. 10-96255 discloses a Western-style toilet facility provided with a negative pressure generating aspirator for converting the pressure into a negative pressure. The air sucked out from the trap is discharged into the rim water passage along with the aspirator discharge water.

  Japanese Patent Application Laid-Open No. 2002-61262 describes a toilet cleaning method in which air is sucked out from the top of a trap by an ejector and the discharged water of the ejector is discharged to a descending conduit of the trap when cleaning the toilet. Yes.

Japanese Patent Application Laid-Open No. 11-264173 provides a replenishing washing water supply system in which a water storage chamber is provided adjacent to the toilet bowl and the toilet bowl is replenished with water in the water storage chamber at the end of washing when the water level of the toilet bowl is lowered. Is described.
Japanese Patent Laid-Open No. 10-96255 JP 2002-61262 A Japanese Patent Laid-Open No. 11-264173

  In the above-mentioned JP-A-10-96255 and JP-A-2002-61262, there is no tank for additionally supplying water to the toilet bowl during the toilet bowl cleaning. For this reason, the amount of water supplied to the toilet bowl after the siphon formation cannot be increased, and the siphon formation is completed early and sufficient washing cannot be performed.

  In the above Japanese Patent Laid-Open No. 11-264173, no negative pressure is formed in the trap, and the time lag from the start of the supply of washing water to the toilet bowl until the siphon is formed in the trap is long.

  It is an object of the present invention to provide a toilet cleaning device and method that sucks and discharges air from a drainage channel and uses ejector discharge water as makeup water after the start of cleaning.

  The toilet flushing device according to claim 1 uses the water supply means for supplying water from the water supply pipe to the toilet bowl of the toilet bowl, the drainage channel connected to the downstream side of the trap of the toilet bowl, and the negative pressure generated by the ejector. Intake / exhaust means for sucking and discharging air from the flow path, additional supply means for additionally supplying water to the toilet bowl, and after flushing the toilet bowl, before the siphon action ends, The toilet cleaning device is provided with a control means for operating the additional supply means, wherein the additional supply means supplies a water tank into which discharged water from the ejector is introduced, and water in the water tank to the toilet. It is characterized by comprising delivery means for delivering to the bowl.

  According to a second aspect of the present invention, in the toilet cleaning device according to the first aspect, the intake / exhaust means further stores a negative pressure generated by the ejector, and a negative pressure for sucking and exhausting air from the drainage flow path using the stored negative pressure. It is characterized by having a tank.

  A toilet bowl cleaning device according to a third aspect is characterized in that, in the first or second aspect, the delivery means takes out water from the lower part of the water tank and sends it to the toilet bowl.

  According to a fourth aspect of the present invention, there is provided a toilet cleaning device according to the third aspect, wherein the delivery means is a jet pump into which water is introduced as a working fluid via a line branched from the water supply pipe.

  A toilet cleaning device according to a fifth aspect of the present invention is the toilet bowl cleaning device according to any one of the first to fourth aspects, wherein a sub-trap is provided in a drainage flow channel downstream of the trap, and the intake and exhaust means includes the trap and the sub-trap The air is sucked and discharged from between the two.

  A toilet bowl cleaning device according to a sixth aspect of the present invention is the toilet chamber cleaning device according to any one of the second to fifth aspects, wherein the intake / exhaust means further includes a working chamber whose interior is partitioned into a first chamber and a second chamber by a movable partition Switching means for switching communication and blocking between the first chamber and the negative pressure tank, an atmosphere release valve for switching communication and blocking between the first chamber and the atmosphere, the second chamber, It has the communicating path which connects a drainage channel.

  The toilet cleaning method according to claim 7, wherein after the cleaning water is started to be supplied to the toilet bowl of the toilet, the toilet is cleaned by sucking and discharging air from the drainage flow channel connected to the downstream side of the trap of the toilet by the negative pressure generated by the ejector. In the method, the water discharged from the ejector is stored in a water tank, and the water in the water tank is supplied to the toilet bowl before the siphon action ends after the suction and discharge of air from the drainage channel is started. It is characterized by doing.

  In the present invention, air is sucked and discharged from the drainage channel on the downstream side of the trap when cleaning the toilet bowl, so that a siphon discharge flow that flows out from the toilet bowl to the drainage channel is formed early.

  In the present invention, the water additionally supplied to the toilet bowl is ejector discharge water, and the water is effectively used. Further, since the ejector discharged water is once stored in the water tank and sent to the toilet bowl by the sending means, the timing of additional supply can be set freely.

  The intake / exhaust means preferably further includes a negative pressure tank that stores a negative pressure generated by the ejector and sucks and exhausts air from the drainage flow path using the stored negative pressure. In this case, due to the negative pressure stored in the negative pressure tank, air is strongly sucked and discharged from the drainage flow path, and a siphon discharge flow is reliably formed. Moreover, the timing at which air is sucked and discharged from the drainage channel can be freely set.

  In this invention, it is preferable to take out water from the lower part of this water tank, and to send it to a toilet bowl. This allows the bubbles to be separated from the water in the water tank, so that the additional supply water contains no or little bubbles. As a result, the generation of an abnormal noise (for example, a bursting sound of bubbles) when the additional supply water flows out into the toilet bowl is prevented.

  When a jet pump using water as the working fluid is used as this delivery means, the water taken out from the water tank and the jet pump discharge water can be supplied together to the toilet bowl, and the amount of water supplied per unit time Can be more.

  In the present invention, it is preferable that a sub-trap is provided on the downstream side of the trap, and air is sucked and discharged from a drainage channel between the trap and the sub-trap. By doing so, it is possible to prevent or suppress the air in the drain pipe on the downstream side of the toilet from being sucked and discharged, and to efficiently suck and discharge the air in the drain channel.

  In the present invention, the intake / exhaust means further includes a working chamber, the interior of which is divided into a first chamber and a second chamber by a movable partition, and switching between communication and blocking between the first chamber and the negative pressure tank. It is desirable to have a switching means for performing communication, an air release valve for switching communication and blocking between the first chamber and the atmosphere, and a communication path for communicating the second chamber and the drainage channel.

  When the first chamber and the negative pressure tank are communicated by the switching means, the first chamber side becomes negative pressure, the negative pressure acts, the movable partition moves to the first chamber side, and the volume of the second chamber is increased. To increase. Since the increase amount of the volume of the second chamber at this time is constant, the amount of air exhausted from the toilet trap portion to the second chamber becomes constant as the volume of the second chamber increases. For this reason, siphon formation in the trap portion is performed stably, and it is prevented that water is sucked together with air in the trap portion.

  In addition, by selecting the internal volume of the working chamber, the amount of air exhausted from the toilet trap portion to the second chamber can be set to an appropriate amount.

  Further, the speed of exhausting from the toilet trap portion to the second chamber can be controlled by selecting the internal volume of the negative pressure tank, the vent diameter of the switching means, and the like. For example, when the internal volume of the negative pressure tank is small, when the first chamber and the negative pressure tank are communicated with each other by the switching means, the negative pressure in the negative pressure tank suddenly decreases, so that the exhaust speed becomes slow. On the other hand, if the internal volume of the negative pressure tank is increased, the negative pressure in the negative pressure tank does not weaken so much when the first chamber and the negative pressure tank are communicated by the switching means, so that the exhaust speed does not slow down. .

  The first and second chambers are partitioned by a movable partition, and only the second chamber side communicates with the toilet trap part, so that sewage and odorous air in the toilet trap part can be stored in a negative pressure tank or negative pressure. It is prevented from entering the generator side.

  After exhausting from the toilet trap portion to the second chamber, the first chamber can be returned to atmospheric pressure by opening the air release valve. Thereby, the movable partition is returned to the original position, and the next cleaning is performed stably.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIGS. 1 to 6 show that the Western-style toilet equipment equipped with the toilet cleaning device according to the embodiment is in order of non-cleaning, toilet bowl cleaning / negative pressure accumulating process, intake / exhaust process, initial water supply process, additional water process It is a schematic diagram which shows the operation state when it exists in a terminal stage and air | atmosphere release and a water covering process. FIG. 7 is a timing chart for explaining the operation of the Western-style toilet equipment of FIGS.

  A rim 3 is provided on the inner periphery of the upper part of the toilet bowl 2 in the porcelain western-style toilet body 1. The toilet bowl 2 communicates with a drain outlet 7 via a trap 4, a drain channel 5, and a sub-trap 6. The drainage flow path 5 falls downward from the highest trap portion 4 a and continues to the sub-trap 6. The drain port 7 is connected to a drain pipe.

  The sub-trap 6 is composed of a U-shaped channel that goes around the lower side of the lowest portion 6b below the pipe wall of the drainage channel 5 and then reaches the highest portion 6a for overflow. The height of the highest portion 6a of the sub trap 6 is slightly higher than the lowest portion 6b.

  However, the lowest-order part 6b may be slightly higher than the highest-order part 6a. In this case, even if water accumulates in the sub-trap 6, the height of the water surface is lower than the lowest position portion 6b. However, if a negative pressure is applied to the drainage channel 5 as described later and a large amount of water flows into the sub trap 6, the water level in the sub trap 6 rises above the lowest portion 6b, and the sub trap 6 is sealed. Watered. Thereby, the inside of the drainage flow path 5 and the drainage port 7 side are sealed.

  A water supply pipe 10 is connected to the rim 3. The toilet body 1 is of a one-way water supply system in which water is supplied only from the rear side of the toilet bowl to the right side or the left side of the rim 3. For this reason, when water is supplied from the water supply pipe 10 toward the rim 3, a clockwise or counterclockwise swirling flow is formed in the toilet bowl 2.

  Pipes 11, 12, and 13 are branched from the water supply pipe 10. A vacuum breaker 11 a is provided at the tip of the pipe 11.

The pipe 12 is introduced into the water tank 20, and its tip is connected to the inlet of the ejector 21. The base end of the pipe 23 is connected to the outlet of the ejector 21, and the tip of the pipe 23 is open in the water tank 20. The air suction port provided in the throat portion of the ejector 21, the proximal end of the air suction pipe 22 is connected with a check valve V _3. The end of the pipe 22 is drawn out of the water tank 20 and connected to the negative pressure tank 30. A communication pipe 26 for communicating the inside of the water tank 20 with the atmosphere is provided at the upper part of the water tank 20.

The check valve V ₃ is one in which air is allowed to flow from the air suction pipe 22 into the ejector 21 prevents this and that the air flows in the opposite direction. This check valve V ₃ is provided outside the water tank 20.

The negative pressure tank 30 is connected to the base end of a pipe 31 having an operation valve V _4, and the tip of the pipe 31 is connected to the upper part of the operation tank 40. The working tank 40 is partitioned into an upper first chamber 41 and a lower second chamber 42 by a diaphragm 43 serving as a movable partition. The pipe 31 is connected to the first chamber 41. Further, the first chamber 41 of the hydraulic tank 40 is connected to the proximal end of the atmosphere open pipe 32 with the air release valve V _5, the tip of the pipe 32 is open to the atmosphere. The second chamber 42 of the working tank 40 and the upper end portion of the drainage flow path 5 communicate with each other via a communication path 44.

A pipe 13 is connected to the downstream side of the connection portion of these pipes 11 and 12 in the water supply pipe 10. The pipe 13 is provided with an on-off valve V ₂ , and the tip of the pipe 13 is introduced into the water tank 20 and connected to the inlet on the lower end side of the jet pump 24. A water suction port 24 a provided in the throat portion of the jet pump 24 is open in the water tank 20. The water suction port 24 a is located at the lower part in the water tank 20.

  A base end of a water follow-up pipe 25 is connected to an outlet of the jet pump 24, and a front end of the pipe 25 is drawn from the water tank 20 and connected to the rim 3.

This toilet bowl cleaning device is provided with control means (not shown) for controlling the opening and closing timings of the main valve V ₁ , the on-off valve V ₂ , the operation valve V ₄ and the atmosphere release valve V ₅ . The control means is not particularly limited, and for example, each valve may be opened / closed by an electric signal, or the valve may be mechanically opened / closed. When the valve is mechanically opened and closed, for example, a water wheel is provided in the water supply pipe 10, the rotation of the water wheel is transmitted to a shaft provided with a plurality of cams via a gear train, and each cam driven valve is rotated by the rotation of each cam. V ₁ , V ₂ , V ₄ and V ₅ may be opened and closed.

  Although not shown, the water tank 20, negative pressure tank 30, working tank 40, control means and the like are housed in a unit case provided at the rear part of the Western-style toilet body 1.

  Next, the operation of the Western-style toilet equipment configured as described above will be described.

[Non-cleaning (Fig. 1)]
In FIG. 7, the main valve V ₁ , the on-off valve V ₂ , the operation valve V _4, and the atmosphere release valve V ₅ are closed at the time of non-cleaning before the time t ₁ .
In this state, the diaphragm 41 in the working tank 40 is in contact with the bottom surface in the working tank 40.

[Toilet bowl washing and negative pressure accumulation process (Fig. 2)]
After defecation, at a time point t ₁ of FIG. 7, the main valve V ₁ is being opened operated by the toilet user.
When the main valve V ₁ is opened, wash water is supplied from the water supply pipe 10 to the rim 3, and flows down while turning along the inner surface of the toilet bowl 2, and a swirling flow is formed in the toilet bowl 2. This swirling flow collects solid excrement in the center of the toilet bowl, loosens the paper and blends in with water, and disperses in the water. For this reason, when a siphon discharge flow is formed later, excrement and paper are discharged smoothly.

A part of the cleaning water flowing in the water supply pipe 10 is stored in the water tank 20 through the pipe 12, the ejector 21 and the pipe 23. By this ejector water flows into 21, ejector 21 sucks the exhaust in the water tank 20 through the air pipe 22 and the check valve V ₃ in the vacuum tank 30. Thereby, the negative pressure is gradually accumulated in the negative pressure tank 30.

  The air supplied from the negative pressure tank 30 into the water tank 20 accumulates in the upper part of the water tank 20.

[Intake and exhaust process (Fig. 3)]
At the time of t _2, hydraulic valve V ₄ is opened by the control means. Thus, the negative pressure in the negative pressure tank 30 is transmitted to the first chamber 41 of the hydraulic tank 40 through the pipe 31 and the operating valve V _4, the first chamber 41 is reduced. Due to the reduced pressure in the first chamber 41, the diaphragm 43 in the working tank 40 is pulled up, and the diaphragm 43 moves and contacts the ceiling surface of the working tank 40 as shown in FIG.

  As the diaphragm 43 moves, the air in the drainage channel 5 is sucked and exhausted into the second chamber 42 of the working tank 40 via the communication path 44, and the inside of the drainage channel 5 is decompressed. At this time, the water level in the toilet bowl 2 is sufficiently high due to the water supply from the water supply pipe 10, and the water head difference from the highest trap portion 4a is sufficiently large. For this reason, the sewage in the toilet bowl 2 is vigorously discharged from the trap 4 to the drainage channel 5 by the biasing force of the head difference and the negative pressure in the drainage channel 5, and the trap 4 and the drainage channel 5. A strong siphon discharge flow is formed inside.

  Due to the formation of the siphon discharge flow, the water in the toilet bowl 2 flows vigorously, the water level in the toilet bowl 2 decreases, and the water level approaches the height of the trap 4 entrance. For this reason, heavy filth is easily discharged from the entrance of the trap 4.

As described above, in this embodiment, the inside of the drainage flow path 5 is set to a negative pressure by using the negative pressure sufficiently accumulated in the negative pressure tank 30. Therefore, when opening the operation valve V _4, rapidly drain passage 5 is decompressed, the toilet bowl 2 to the trap 4 is as water flows vigorously, efficiently siphon discharge flow is formed.

  In the present embodiment, the inside of the working tank 40 is partitioned into a first chamber 41 and a second chamber 42 by the diaphragm 43, and only the second chamber 42 communicates with the drainage flow path 5. For this reason, the sewage of the drainage flow path 5 or the air containing odor is prevented from entering the negative pressure tank 30 or the ejector 21 side.

  In the present embodiment, the diaphragm 43 moves from a position where it contacts the bottom surface of the working tank 40 to a position where it contacts the ceiling surface of the working tank 40, so that a certain amount of air corresponding to the volume of the working tank 40 flows into the drainage flow. Exhaust from line 5. Therefore, by appropriately selecting the volume of the working tank 40, an appropriate amount of air can be exhausted from the drain passage 5 without excess or deficiency.

  The amount of air exhausted from the drainage channel 5 to the second chamber 42 is appropriately determined by selecting the internal volume of the working tank 40 in accordance with the volume of the toilet bowl 2, the trap 4 and the drainage channel 5. Can be in quantity.

Further, the opening diameter of the volume and operating valve V ₄ of the negative pressure tank 30, the opening degree, by adjusting the tube diameters of the pipe 31, it is possible to adjust the pumping speed of the air in the drainage flow path 5. For example, when the volume of the negative pressure tank 30 is large and a large volume of negative pressure can be stored, the diaphragm 43 is rapidly pulled up by the negative pressure in the negative pressure tank 30, and the drainage flow path The exhaust speed of the air from inside 5 becomes faster. If you increase the opening degree of the hydraulic valve V ₄ is the same. On the other hand, or to reduce the volume of the negative pressure tank 30, in the case of small degree of opening of the actuated valve V _4, the exhaust velocity of the air from the water discharge flow channel 5 becomes slow.

[Initial water replenishment process (Fig. 4)]
At time of t ₃ when the water level in the toilet bowl 2 is reduced to the height near the inlet of the trap 4, the on-off valve V ₂ is opened by the control means. As a result, part of the cleaning water in the water supply pipe 10 is diverted and supplied to the rim 3 via the pipe 13, the jet pump 24 and the pipe 25. At this time, the water stored in the water tank 20 is sucked from the water suction port 24 a of the jet pump 24 by the water flow of the cleaning water flowing in the jet pump 24 and passes through the pipe 25 together with the cleaning water from the pipe 13. And supplied to the rim 3. Thereby, the water level in the water tank 20 falls.

  Thus, before the air flows into the drainage channel from the toilet bowl, in addition to the cleaning water supplied from the water supply pipe 10 to the rim 3, additional supply water (water addition) from the pipe 25 is also provided to the stool. Since it is supplied to the pot 2, the water level of the toilet bowl 2 rises. For this reason, the trap 3 does not break, the siphon operation continues without interruption, and the waste discharge capability is high. In addition, the siphoning operation is continued without interruption due to this water replenishment, and lightweight materials such as paper remaining in the toilet bowl 2 are strongly discharged without stagnation near the trap entrance. At this time, if additional water is supplied so as not to disturb the flow of the cleaning water, the cleaning can be efficiently performed with a smaller amount.

In the present embodiment, the water supplied to the ejector 21 in the steps of FIGS. 2 to 3 is stored in the water tank 20 and this stored water is used as additional water, so that effective use of water is achieved. Further, since the discharged water of the ejector 21 is once stored in the water tank 20 and supplied to the toilet bowl 2 by the jet pump 24, a large amount of additional water can be supplied to the toilet bowl 2 at a stretch. Note that by selecting the opening timing of the opening and closing valve V _2, it is possible to freely set the timing of the start and stop of the add water.

  In the present embodiment, since water is taken out from the lower part of the water tank 20 and is sent to the toilet bowl 2, the bubbles are separated from the water in the water tank 20, and the additional supply water has no or almost no bubbles. Does not include. As a result, the generation of abnormal noise (for example, bubble burst sound) when the additional supply water flows out to the toilet bowl 2 is prevented.

[End of water replenishment process (Fig. 5)]
As FIG. 5, at time t ₄ when a while elapsed from the time of t _3, the opening and closing valve V ₂ is closed by the control means. As a result, there is no supply of additional water from the pipe 25 to the rim 3, and the water level in the toilet bowl 2 is lowered. When the water level further decreases, the trap 4 is broken and the siphon operation is stopped.

Incidentally, when t ₄ when closing the on-off valve V ₂ is, may be after the water level in the water tank 20 becomes lower than the water suction port provided in the throat of the jet pump 24, the water suction port It is preferable that it is before becoming lower. In this case, the air in the water tank 20 is prevented from being sucked from the water suction port. For this reason, the jet pump 24 is prevented from sucking the air in the water tank 20 to generate abnormal noise, and the water entrained with air flows out of the rim 3 through the pipe 25 and generates abnormal noise. Is also prevented.

[Opening to the atmosphere and water covering process (Fig. 6)]
with operating valve V ₄ is closed by the control means at the time of t _5, the air release valve V ₅ is opened. As a result, the first chamber 41 in the working tank 40 returns to the atmospheric pressure, and the diaphragm 43 is pushed downward by the atmospheric pressure and the dead weight of the diaphragm 43 to come into contact with the bottom surface of the working tank 40, so that the state shown in FIG. Return.
Thereafter, the atmosphere opening valve V ₅ are closed by the control means at the time of t _6.

Later passed since siphon operation stops and the water accumulated in the toilet bowl 2, the main valve V ₁ is being closed at a time point t _7. This returns to the non-cleaning state and the cleaning is completed.

This embodiment is an example of the present invention, and the present invention is not limited to the above embodiment. For example, in the present embodiment, the pipe 32 provided with the atmosphere release valve V ₅ is connected to the upper part of the working tank 40, but is connected to a part of the pipe 31 between the working valve V ₄ and the working tank 40. Also good.

A valve provided on the upstream side of the ejector 21 of the pipe 12, the water passing step may be opened on-off valve V ₂ after closing the valve. In this case, since the amount of washing water flowing in the pipe 13 increases, the stored water in the water tank 20 is sucked and discharged more strongly by the jet pump 24, and the water flow of the additional water becomes stronger.

It is a schematic diagram which shows an operation state when the western style toilet bowl equipment provided with the toilet bowl washing | cleaning apparatus which concerns on embodiment is at the time of non-washing. It is a schematic diagram of the Western-style toilet equipment which concerns on embodiment. It is a schematic diagram which shows an operating state when the western-style toilet equipment of FIG. 1 exists in a toilet bowl washing | cleaning and negative pressure accumulation process. It is a schematic diagram which shows an operation state when the western-style toilet equipment of FIG. 1 exists in an intake / exhaust process. It is a schematic diagram which shows an operation state when the Western-style toilet equipment of FIG. 1 exists in the water replenishment process initial stage. It is a schematic diagram which shows an operating state when the Western-style toilet equipment of FIG. 1 exists in the last stage of a water replenishment process. It is a schematic diagram which shows an operating state when the Western-style toilet equipment of FIG. 1 exists in an air | atmosphere open | release and water covering process. It is a timing chart explaining the action | operation of the western style toilet bowl equipment provided with the toilet bowl washing | cleaning apparatus of FIGS.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toilet body 2 Toilet bowl 3 Rim 4 Trap 5 Drain flow path 6 Sub trap 7 Drain outlet 10 Water supply pipe 20 Water tank 21 Ejector 24 Jet pump 30 Negative pressure tank 40 Actuation tank 41 First chamber 42 Second chamber 43 Diaphragm 44 Connection aisle

Claims (7)

Water supply means for supplying water from the water supply pipe to the toilet bowl,
A drainage channel connected to the downstream side of the toilet trap,
Intake / exhaust means for sucking and discharging air from the drainage channel using negative pressure generated by the ejector;
Additional supply means for additionally supplying water to the toilet bowl;
A toilet cleaning device provided with a control means for operating the additional supply means after the intake and exhaust means are activated and before the siphoning action is finished in toilet cleaning,
The toilet bowl cleaning apparatus, wherein the additional supply means includes a water tank into which discharged water from the ejector is introduced, and a delivery means for sending water in the water tank to the toilet bowl.   2. The toilet according to claim 1, wherein the intake / exhaust means further includes a negative pressure tank that stores a negative pressure generated by the ejector and sucks and exhausts air from the drainage flow path by the stored negative pressure. Cleaning device.   3. The toilet bowl cleaning device according to claim 1, wherein the delivery means takes out water from a lower part of the water tank and sends it to a toilet bowl.   4. The toilet bowl cleaning apparatus according to claim 3, wherein the delivery means is a jet pump into which water is introduced as a working fluid through a line branched from the water supply pipe. In any one of Claims 1 thru | or 4, the sub trap is provided in the drainage flow path of the downstream of the said trap,
The toilet cleaning device is characterized in that the intake / exhaust means sucks and discharges air from between the trap and the sub-trap. 6. The intake / exhaust means according to claim 2, further comprising:
A working chamber whose interior is partitioned into a first chamber and a second chamber by a movable partition;
Switching means for switching between communication and blocking between the first chamber and the negative pressure tank;
An atmosphere release valve for switching communication between the first room and the atmosphere and switching between the atmosphere and the atmosphere;
A toilet cleaning device comprising: a communication passage communicating the second chamber and the drainage channel. In the toilet flushing method of sucking and discharging air by a negative pressure generated by an ejector from the drainage flow channel connected to the downstream side of the toilet trap after starting the supply of flushing water to the toilet bowl of the toilet bowl,
The discharge water of the ejector is stored in a water tank, and after the suction and discharge of air from the drainage channel is started, the water in the water tank is supplied to the toilet bowl before the siphon action ends. A toilet cleaning method.

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