JP2005264469A - Flush toilet bowl - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tankless flush toilet bowl capable of fully washing the inside of the toilet bowl even if water supply pressure from a water pipe is low. <P>SOLUTION: The flush toilet bowl is provided with a rim water flow part formed at the upper opening peripheral edge of a toilet bowl body, and jet holes opened toward a trap inflow port formed at the bottom of the toilet bowl body, wherein wash water can be discharged from the rim water flow part and the jet holes. A first conduit way and a second conduit way are connected in communication with a water supply pipe connected in communication with the water pipe through wash water supply means, and the first conduit way is connected in communication with the rim water flow part while a pump unit comprising a tank for storing water from the water pipe and a pump for supplying storage water in the tank to the jet holes through a third conduit way is disposed at the second conduit way. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a Western-style flush toilet, and more particularly, to a siphon-jet flush toilet capable of discharging flush water from a rim water passing portion and the jet hole.

  Conventionally, it is formed on the periphery of the upper opening of the toilet body, and it is opposed to the rim water passage part that allows the wash water to flow down the inner wall of the toilet body to wash the inside of the toilet body, and the trap inlet formed at the bottom of the toilet body. There is a Western-style flush toilet equipped with a zet hole that opens to a position where the water is discharged and discharges the washing water toward the trap inlet to forcibly cause a siphon phenomenon to discharge filth and the like.

  In such flush toilets, flush toilets having a configuration in which a low tank for storing flush water is abolished to improve appearance and water can be directly supplied from the water pipe to the rim water passing portion and the jet hole are also known. ing.

  Such a tankless flush toilet is smart and luxurious because there is no tank, but it is difficult to install because the washing flow rate required to discharge filth cannot be obtained where the water supply pressure is low. There was a problem.

  Therefore, a flush toilet equipped with a configuration that can sufficiently wash the inside of the toilet bowl even when the water pressure is low has been proposed for the purpose of enabling installation as a tankless tank even when the water pressure is not sufficient.

  For example, a water supply pipe that is connected to a water pipe and can supply the water in the water pipe as cleaning water, and a cleaning means that is connected to the water supply pipe and can wash the toilet bowl main body with cleaning water, is fixed to the toilet main body. There is a cover provided with a pressurizing pump that can pressurize the wash water supplied from the water supply pipe and supply it to the toilet body (see Patent Document 1, for example).

There is also a tankless flush toilet that is provided with a storage tank in the toilet body that communicates with the jet hole and a pump that pumps the water in the storage tank to the jet hole as washing water. It has been. The storage tank can be stored in the tank when communicating with the rim water passing portion and supplying water to the rim water passing portion (see, for example, Patent Document 2).
JP 2003-138623 A Japanese Patent No. 2800421

  However, since the flush toilet disclosed in Patent Document 1 has a structure in which a pump is directly attached to a water supply pipe connected to a water pipe, when the pump is driven, for example, another faucet terminal branched from the water pipe There is a possibility that the water supply capacity to the water supply may be reduced, and there is a risk of inconvenience other users when a plurality of flush toilets are attached or users of other faucet terminals sharing a water pipe.

  Further, in the flush toilet disclosed in the above-mentioned Patent Document 2, since the washing water that is pumped and pumped to the jet hole is stored water in the tank, there is no fear that the above-mentioned problem occurs, but water is supplied to the rim water passing portion. Since water is also sometimes stored in the tank, the flow rate for rim water flow may be reduced, and it is difficult to control the flow rate. Further, when the storage tank and the pump are incorporated in the toilet body, the maintenance of the pump is particularly troublesome and may take time. In addition, for example, it has been extremely difficult to retrofit these to an existing flush toilet.

  An object of the present invention is to provide a flush toilet that can solve the above-described problems.

  According to the first aspect of the present invention, the rim water passing portion includes a rim water passing portion formed on the periphery of the upper opening of the toilet body, and a jet hole opened toward the trap inflow port formed in the bottom of the toilet body. In the flush toilet capable of discharging wash water from the jet hole and the water supply pipe connected to the water pipe, the first water conduit and the second water conduit are connected to each other via the cleaning water supply means. While the first water conduit is connected to the rim water communication portion, the second water conduit has a tank for storing water from the water pipe and the water stored in the tank via the third water conduit. A pump unit including a pump that supplies the jet holes is disposed.

  The present invention according to claim 2 is characterized in that, in the flush toilet, the pump unit is installed outside the toilet body.

  According to a third aspect of the present invention, the flush toilet according to the first or second aspect further comprises a water supply control means for supplying water to the rim water passing portion and the jet hole at a predetermined timing. After supplying water to the rim water passage, the means switches the flow path from the first water conduit to the second water conduit and drives the pump to supply water from the tank to the jet hole to discharge filth. Thereafter, the flow path is switched to the first water conduit and the rim water passage is supplied with water to seal the inside of the toilet body, and then the flow path is switched again to the second water conduit and a predetermined amount is added to the tank. It is also characterized by water supply control so as to replenish water.

  In the fourth aspect of the present invention, the flush toilet according to the third aspect is characterized in that water is replenished from the water pipe to the tank in synchronism with a water supply timing from the tank to the jet hole. .

  According to a fifth aspect of the present invention, in the flush toilet according to any one of the first to fourth aspects, the third water conduit connecting the pump unit and the jet hole is connected to the atmosphere in the middle thereof. Another feature is that an open valve is provided.

  The present invention according to claim 6 is characterized in that, in the flush toilet according to claim 5, a check valve is attached to the downstream side of the atmosphere release valve provided in the third water conduit.

  (1) In the present invention described in claim 1, the rim is provided with a rim water passing portion formed on the periphery of the upper opening of the toilet body, and a zet hole opened toward the trap inlet formed at the bottom of the toilet body. In the flush toilet capable of discharging wash water from the water passage and the jet hole, respectively, the first water conduit and the second water conduit are connected to the water supply pipe connected to the water pipe through the wash water supply means. The first conduit is connected to and connected to the rim conduit, while the second conduit is connected to a tank for storing water from the water pipe and the stored water in the tank to the third conduit. Since the pump unit provided with the pump to be supplied to the zet hole is disposed, the low tank disposed in the upper part of the toilet body is usually abolished, and it can be a smart and high-quality flush toilet, Where the water supply pressure is low However, it is possible to ensure a sufficient amount of water to be washed out and to reliably discharge filth, and by switching the flow path, water can be directly introduced from the water pipe to the rim water passage and the tank. The water can be stored in a desired capacity in the tank in a short time.

  (2) In the present invention according to claim 2, since the pump unit is installed outside the toilet body, in addition to the effect of the above (1), maintenance related to the pump unit is easy, and the pump unit Can be retrofitted.

  (3) In the present invention described in claim 3, the water supply control means for supplying water at a predetermined timing to the rim water passing portion and the zet hole is provided, and the water supply control means is configured to supply water to the rim water passing portion. The flow path is switched from the first water conduit to the second water conduit and the pump is driven to supply water from the tank to the jet hole to discharge filth, and then the flow path to the first water conduit Because the water supply control is performed so that the rim water supply portion is switched and water is sealed inside the toilet body, and then the flow path is switched to the second water conduit and water is supplied to the tank up to a predetermined amount. Moreover, in addition to the effect (1) or (2) above, the waste inside the toilet body can be discharged from the inside of the toilet body, and further, the subsequent sealing operation in the toilet body can be performed smoothly and quickly.

  (4) In the present invention according to claim 4, water is replenished from the water pipe to the tank in synchronism with the water supply timing from the tank to the jet hole. The amount of water can be supplied to the jet hole, and the time for replenishing the water until the determination can be shortened thereafter.

  (5) In this invention of Claim 5, since the 3rd water conduit which connects the said pump unit and the said jet hole in communication was provided with the air release valve in the middle, the 3rd water conduit and the atmosphere are By communicating, in addition to the effects (1) to (4), it is possible to prevent water from flowing even when the water level in the toilet body is different from the water level in the tank.

  (6) In addition to the effect of (5) above, by attaching a check valve downstream of the atmosphere release valve provided in the third water conduit, the water stored in the toilet body flows back into the tank. Can be reliably prevented.

  The present invention comprises a rim water passage formed on the periphery of the upper opening of the toilet body, and a jet hole opened toward the trap inlet formed at the bottom of the toilet body, the rim water passage and the jet hole In the flush toilet capable of discharging wash water from each of the first and second water conduits, the first water conduit and the second water conduit are connected to each other via a wash water supply means to a water supply pipe connected to the water pipe. Is connected to the rim water passage, while the tank for storing water from the water pipe and the water stored in the tank are supplied to the jet hole through the third water conduit in the second water conduit. A pump unit including a pump is disposed.

  That is, a rim formed on the peripheral edge of the upper opening of the toilet body so that a sufficient amount of washing water can be secured and filth can be reliably discharged even when the water supply pressure is low. When water can be selectively supplied to the water passage portion and the tank and water is supplied to the jet hole, the water supplied from the water pipe and stored in the tank is forcibly pumped by a pump. The water supplied from the water source to the water pipe is not limited to tap water but may be middle water.

  The washing water supply means can be constituted by a combination of an on-off valve and a flow path switching valve, which is provided in a water supply pipe together with a negative pressure release valve, etc., and incorporated in the valve unit, and this unit is stored in the toilet body It can be arranged.

  In the present embodiment, as the valve unit, a constant flow valve attached to a water supply pipe that is connected to the water pipe, the open / close valve and the flow path switching valve that are sequentially arranged on the downstream side of the constant flow valve, Is configured to include a negative pressure release valve. And the said 1st water conduit and the 2nd water conduit are connected with the water supply pipe | tube via the said flow-path switching valve.

  As described above, since the plurality of valve mechanisms are stored together in the toilet body in a compact manner, the mechanisms such as the valves are not exposed, and the aesthetic appearance of the toilet room or the like in which the flush toilet is installed is not impaired. Moreover, since it is unitized compactly, even if it is stored in the toilet body, the entire toilet does not increase in size, and there is no risk of impairing the smart appearance of the flush toilet itself.

  Further, the flush toilet according to the present embodiment includes water supply control means for supplying water to the rim water passing portion and the jet hole at a predetermined timing so that the user can smoothly wash the toilet bowl. The water supply control means switches the flow path from the first water conduit to the second water conduit after the water is supplied to the rim water passing section and drives the pump to supply water from the tank to the jet hole so as to receive filth. And then switching the flow path to the first water conduit and supplying water to the rim water passage to seal the toilet body, and then switching the flow path to the second water conduit again and the tank. The water supply is controlled so as to replenish water up to a predetermined amount. Therefore, it is possible to smoothly and promptly perform the waste discharge from the cleaning inside the toilet body and the subsequent sealing operation in the toilet body.

  In this water supply control, it is preferable that water is supplied from the water pipe to the tank in synchronization with a water supply timing from the tank to the jet hole. That is, the cleaning water is chased and replenished into the tank in accordance with the discharge of the cleaning water from the jet hole. Therefore, even with a small tank, a sufficient amount of water can be supplied to the jet hole, and the time for replenishing the water up to a fixed amount can be shortened thereafter.

  That is, when the user performs a toilet cleaning operation (at this time, a predetermined amount of water is stored in the tank), the water from the water pipe first passes through the first water conduit to the rim water passing portion. The bowl part formed in the toilet body main body by the flow and water discharge from the rim water passing part is subjected to primary cleaning. The flow rate to the rim water passing portion, that is, the amount of water supply for primary cleaning can be controlled by time management using a timer.

  Next, the control means switches the flow path switching valve to the second water conduit side and drives the pump. As a result, the stored water is pumped as washing water to the zet hole, and a negative pressure is generated in the trap drainage channel communicating with the trap inlet by the washing water, and the pooled water in the bowl portion is called in to the trap drainage channel. A siphon action is generated inside, and discharge of filth and the like is started. The pumping amount of the tank stored water by the pump can also be controlled by managing the pump driving time by the timer.

  After the pump is driven for a predetermined time, the pump is stopped. At this time, the control means switches the flow path to the first water conduit and supplies water from the water pipe to the rim water passing portion. That is, secondary cleaning in the bowl portion is performed and the inside of the bowl portion is sealed with water. Also regarding the flow rate to the rim water passing portion in the secondary cleaning, that is, the amount of water necessary for water sealing, the control means may be controlled by time management by a timer. In addition, although it is preferable that the timing which switches a flow path to a 2nd water conduit for the said secondary washing | cleaning, and the timing which stops the drive of a pump are substantially simultaneous, both do not necessarily need to be the same timing.

  And after predetermined time progress, a control means switches a flow path to a 2nd water conduit again, and replenishes the tank to a predetermined amount. In this case, the amount of water is controlled by providing a float switch in the tank and turning off the cleaning water supply means in response to a signal from the float switch. That is, the control means closes the on-off valve and the flow path switching valve.

  As described above, according to the present embodiment, the low tank that is normally disposed on the upper part of the toilet body can be abolished, and the tankless flush toilet with a high-class feeling can be obtained. Since the water can be selectively conducted directly from the water pipe to the rim water passing portion and the jet hole, a sufficient amount of washing water can be secured even when the water supply pressure is low, and the filth can be reliably discharged. In addition, in both the primary cleaning and the secondary cleaning, it is possible to secure a sufficient amount of water supply to the rim water passing portion, and further, the water sealing function after the toilet bowl cleaning can be performed smoothly and quickly, and a desired capacity in the tank. The water can be stored in a short time. Furthermore, even if there is a faucet terminal sharing the water supply, since the washing water stored in the tank of the pump unit is used, the water pressure at the faucet terminal suddenly increases even if a large amount of water is used in a short time. There is no risk of adverse effects such as lowering.

  In the flush toilet according to this embodiment, the pump unit is installed outside the toilet body.

  Therefore, for example, when the pump breaks down or during periodic inspection, maintenance relating to the pump unit can be easily performed. Further, from the manufacturing side, it is possible to make the pump unit a flush toilet that can be retrofitted with a slight design change to the existing tankless flush toilet.

  By the way, the said pump unit and the said jet hole can be connected by the 3rd water conduit which provided the air release valve in the middle. Since the third conduit is communicated with the atmosphere by the atmosphere release valve, the flow of water can be prevented even when the water level in the toilet body is different from the water level in the tank.

  Further, it is more preferable to install a check valve downstream of the atmosphere release valve. With this check valve, it is possible to reliably prevent the water stored in the toilet body from flowing back into the tank.

  Hereinafter, embodiments of the present invention will be described more specifically based on the drawings. Note that the flush toilet according to the present embodiment is a Siphon Zet type Western flush toilet. 1 is a front view of a flush toilet according to the present embodiment, FIG. 2 is a perspective view from the rear of the flush toilet, FIG. 3 is a schematic explanatory view of the flush toilet, and FIG. 4 is a valve housed in the toilet body. FIG. 5 is an explanatory diagram of piping including the unit, and FIG. 5 is a time chart at the time of washing in the flush toilet.

  As shown in FIGS. 1 and 2, the flush toilet 1 includes a toilet seat 11 that is openably and closably disposed in an upper surface opening of the toilet body 10, and a toilet lid that is also disposed on the toilet seat 11 and is openable and closable. 12 and a functional part casing 13 is provided at the rear part of the toilet body 10. In this functional part casing 13, a local cleaning device (not shown) and a valve unit 2 described later are accommodated. In FIG. 2, reference numeral 13a denotes a hot air fan inlet provided in the local cleaning device.

  As shown in FIG. 3, the interior of the toilet body 10 is divided into a bowl portion 14 and a trap drainage channel 15 by a partition wall 16, and a rim portion 17 is formed on the upper peripheral edge of the bowl portion 14. A rim water passing portion 4 that communicates with the water source 3 is formed on the slightly rear side of 17. 41 is a rim water passage opening.

  In addition, the trap drainage channel 15 has a substantially inverted U shape so as to connect a trap inlet 15a formed in the lower rear part of the bowl portion 14 and a drainage port 15b opened substantially at the bottom center of the toilet body 10. Is formed. Reference numeral 15c denotes a dam part which is the uppermost part of the trap drainage channel 15, and 15d is a straight pipe part which forms the downstream side of the dam part 15c.

  Moreover, the bottom part of the bowl part 14 is provided with the jet hole 51 which injects washing water toward the said trap inflow port 15a in the position facing the said trap inflow port 15a. Reference numeral 5 denotes a water pipe for a jet which is disposed in the toilet body 10 and is formed in a substantially J shape, and is provided with a nozzle 51a having the jet hole 51 opened at the tip.

  In the flush toilet 1 according to the present embodiment, in the above-described configuration, the water supply pipe R0 is connected in communication with the water pipe 6 connected in communication with the water source 3, and the water supply pipe R0 is connected in communication with the rim water supply section 4 in the first configuration. The first water conduit R1 and the second water conduit R2 are connected to each other via the washing water supply means 8, and the tank 71 for storing water from the water pipe 6 in the second water conduit R2 and the tank 71 The pump unit 7 having a pump 72 for supplying the stored water to the jet hole 51 is provided.

  That is, as shown in FIGS. 1 to 4, the water pipe 6 is connected to the water source 3 piped facing the wall W (see FIG. 3) of the toilet room Q from the outside, and the tip of the water pipe 6 is connected. The functional unit casing 13 of the toilet body 10 is extended into the functional unit casing 13 and the end thereof is connected to the water supply pipe R0 to which the valve unit 2 is attached.

  Here, the valve unit 2 disposed in the functional part casing 13 of the toilet body 10 is, as shown in FIG. 3, a constant flow valve 21 from the upstream side of the water supply pipe R0 that is connected to the water pipe 6. The cleaning water supply means 8 comprising a solenoid type electromagnetic on-off valve 22 and the flow path switching valve 23 disposed in order on the downstream side of the constant flow valve 21, and the flow path provided in the valve unit 2. The two downstream water supply pipes that are extended from the switching valve 23 and provided with the negative pressure breaking valve 24 are extended.

  The first water conduit R1 is connected to one of the downstream water supply pipes and the second water conduit R2 is connected to the other, and the rim water conduit 42 forming the tip side of the first water conduit R1 is connected to the rim water conduit. 4, the nozzle 43 attached to the tip of the rim water passage 42 is made to face the rim water passage opening 41, while the end of the second water conduit R 2 is made to penetrate the upper wall 71 d of the tank 71. Open in the tank 71. The third water conduit R <b> 3 is extended from the upper wall 71 d through a pump 72 attached to the tank 71 and is connected to the starting end of the water pipe 5 for the jet. In FIG. 3, reference numeral 61 denotes a valve portion provided in the water pipe 6, which incorporates a water stop valve 61a and a strainer 61b. Reference numeral 62 denotes a branch channel for branching from the water pipe 6 to supply water to the local cleaning device.

  With this configuration, even when the water supply pressure from the water source 3 is low, the water from the water pipe 6 is selectively supplied to the rim water passing portion 4 and the tank 71, and thus stored in the tank 71. Water can be forcibly pumped to the jet hole 51 by the pump 72, and a sufficient amount of washing water can be secured and the filth can be reliably discharged.

  Incidentally, in the present embodiment, the third water conduit R3 is provided with the air release valve 25 shown in FIG. 6 and the check valve 77 shown in FIG. 7 from the upstream side, that is, the tank 71 side. Accordingly, the third water conduit and the atmosphere communicate with each other by the atmosphere release valve 25, and even when the water level in the toilet body 10 and the water level in the tank 71 are different, the flow of water can be prevented, and The check valve 77 reliably prevents the water stored in the toilet body 10 from flowing back into the tank 71.

  In addition, in FIG. 6 which shows the air release valve 25, 25a is a water inlet, 25b is a water outlet, and is connected with said 3rd water conduit R3. 25c is provided with a plurality of claw bodies 25d radially, and an opening 25e that opens the third water conduit R3 to the atmosphere is formed between the claw bodies 25d (in line II in FIG. 6A). FIG. 6 (c) showing an end view) is a valve body having a valve seat 25f on the back surface, and is mounted so as to move up and down along the guide shaft 25g. A casing 25k forms a valve chamber 25h in which the valve body 25c and the guide shaft 25g are disposed, and an air opening 25j is formed on the upper surface. With this configuration, when there is no inflow of water, as shown in FIG. 6 (a), the third water conduit R3 communicates with the atmosphere via the opening 25e, and the water level and the tank in the toilet body 10 are stored. Even when the water level in 71 is different, the flow of water can be prevented. On the other hand, when there is an inflow of water, the valve body 25c is pushed upward as shown in FIG. 6 (b), and the valve seat 25f is brought into close contact with the seat portion 25m, so that water leaks to the atmosphere opening 25j. I try to prevent it.

  Further, in FIG. 7 showing the check valve 77, 77g is a valve casing attached in the third water conduit R3, and forms a water inlet 77a and a water outlet 77b communicating with the third water conduit R3, In the meantime, a valve chamber 77d is formed. 77c is a valve body disposed in the valve chamber 77d, and is biased by a spring 77f so as to be in close contact with the seat portion 77e formed so as to face the water inlet 77a and seal the water inlet 77a. ing. 77h is a seal ring attached to the valve body 77c, and 77j is an O-ring interposed between the casing 77g and the inner wall of the third water conduit R3. With this configuration, the direction of water flow in the third water conduit R3 is regulated in one direction (from the water inlet 77a side to the water outlet 77b side), as shown in FIG. 7B. That is, water in the third water conduit R3 flows from the tank 71 side to the jet hole 51, but does not flow from the jet hole 51 side to the tank 71 side.

  The pump unit 7 is installed outside the toilet body 10. In this embodiment, as shown in FIG. 2, the pump unit 7 is disposed on the opposite side of the water pipe 6 with the toilet body 10 interposed therebetween. A straight pipe part 15d of the trap drainage channel 15 is formed at the rear part of the toilet body 10, and in this embodiment, the pump unit 7 is disposed in the recesses 18 formed on the left and right sides of the straight pipe part 15d. ing. Therefore, the pump unit 7 does not get in the way in the toilet room Q. Moreover, since the pump 72 is externally attached to the toilet body 10 and the pump 72 is attached to the front wall 71a of the tank 71, maintenance of the pump 72 is facilitated. In the present embodiment, as shown in FIG. 2, the straight pipe portion 15 d is covered with a flange portion 19, and a pipe insertion hole 19 b and the like are formed on a side surface 19 a of the flange portion 19.

  The tank 71 of the pump unit 7 is formed in a substantially rectangular box shape, and the bottom wall 71b is inclined downward toward the pump 72 so that the stored water 73 in the tank 71 can be efficiently discharged. 71c is a tank support leg.

  The tank 71 is provided with a float switch 74, and an overflow pipe 75 that also serves as air suction is extended from the upper wall 71d into the valve unit 2. The overflow pipe 75 extends into the valve unit 2 and communicates with the negative pressure breaking valve 24 provided in the first water conduit R <b> 1 in the valve unit 2.

  With the above configuration, the flush toilet 1 according to the present embodiment can selectively supply water from the water source 3 to the rim water passing portion 4 and the tank 71 as described above, and supply water to the jet hole 51. Since the stored water 73 in the tank 71 can be forcibly pumped by the pump 72, even if it is installed in an area where the water supply pressure from the water source 3 is low, waste discharge processing is possible without any problem. When another faucet terminal or the like is connected to the water source 3, even if a large amount of water is used for washing in the flush toilet 1 for a short time, the water pressure at the faucet terminal is drastically reduced. There is also no risk of affecting.

  Further, the flush toilet 1 according to the present embodiment includes a control panel (not shown) in which the electromagnetic on-off valve 22 and the flow path switching valve 23, and the pump 72 and the float switch 74 are disposed in the functional unit casing 13. This control panel controls the supply of toilet flushing water. That is, the control panel substantially functions as water supply control means. 1 to 4, 72a is a wiring for connecting the pump 72 and the control panel, and 74a is a wiring for connecting the float switch 74 and the control panel.

  Here, the water supply control by the water supply control means carried by the control panel will be described with reference to FIGS.

  This water supply control means is provided with a timer, and as shown in FIG. 5, basically, water is supplied to the rim water passing portion 4 and the jet hole 51 at a predetermined timing. Is also controlled by time.

  When the user of the flush toilet 1 performs a washing operation by, for example, pressing a washing switch (not shown) provided in the toilet body 10, the control panel switches the electromagnetic switching valve 22 and the flow path switching of the valve unit 2. A drive signal for opening the valve 23 is output (t1) to connect the water pipe 6 and the first water conduit R1 side, and water is supplied to the rim water passing portion 4. Water from the water pipe 3 passes through the rim water passing portion 4 and is discharged as primary cleaning water from the rim water passing opening 41 into the bowl portion 14 and starts washing while turning the inner wall of the bowl portion 14. At this time, it is assumed that there is a predetermined amount of stored water 73 in the tank 71 of the pump unit 7. Therefore, the float switch 74 is in the ON state.

  When a predetermined time has elapsed (t2), the control panel outputs a drive signal for switching the flow path from the first water conduit R1 to the second water conduit R2 to the flow path switching valve 23 and also to the pump 72 of the pump unit 7 A drive signal is output and driven. Therefore, the water from the water pipe 3 flows into the second conduit R2 without flowing into the first conduit R1. That is, the water flows through the water pipe 6 → the constant flow valve 21 → the electromagnetic on-off valve 22 → the flow path switching valve 23 → the second water conduit R 2 → the tank 71 and flows into the tank 71 and is stored in the tank 71. The water 73 is pumped to the pump 72 → the third water conduit R3 → the water pipe 5 for the jet → the jet hole 51 by the driving of the pump 72, and the washing water ejected from the jet hole 51 toward the trap inlet 15a. A negative pressure is generated in the trap drainage channel 15, the pooled water in the bowl portion 14 is drawn in, a siphon phenomenon is caused in the trap drainage channel 15, and zet cleaning is performed in which filth flows out to the discharge port 15 b. The amount of water required for such zet cleaning is approximately 20 liters / min. In this way, since the zet cleaning is performed while replenishing the tank 72, the capacity of the tank 72 is set to a small size of about 2 to 3 liters. It becomes possible.

  The time required for the cleaning of the jet is determined in advance, and when the predetermined time has elapsed (t3), the control panel outputs a stop signal for stopping the pump 72 to stop driving the pump 72 and A drive signal is output to the path switching valve 23 to switch the flow path to the first water conduit R1 again. Thereby, the water from the water pipe 3 is supplied to the rim water passing portion 4 as secondary washing water, and the inside of the bowl portion 14 of the toilet body 10 is sealed. In addition, the time required for this water sealing is also set in advance, and water supply control by time management using a timer is performed until this time.

  When the water sealing time has elapsed (t4), the control panel outputs a drive signal to the flow path switching valve 23 to switch the flow path to the second water conduit R2 again, and to replenish water from the water pipe 3 into the tank 71. To do.

  Thereafter, the control panel outputs a valve closing drive signal to the electromagnetic on-off valve 22 at a timing (t5) when a predetermined amount of water is stored in the tank 71. However, this electromagnetic on-off valve 22 is composed of a pilot part equipped with a solenoid valve and a main valve using a diaphragm. Since there is a time lag until the main valve is completely closed, the water from the water pipe 6 is controlled. Even after the valve closing drive signal is output from the panel, it flows into the tank 72.

  When the stored water 73 in the tank 71 reaches a predetermined amount, the float switch 74 is turned ON (t6), and the control panel receiving the signal from the float switch 74 outputs a drive signal to the flow path switching valve 23. Then, the flow path is switched again to the first water conduit R <b> 1, and the water that flows when the electromagnetic on-off valve 22 is not completely closed is caused to flow into the bowl portion 14 from the rim water passing portion 4.

  As mentioned above, although this invention has been demonstrated through embodiment, this invention is not limited to the said embodiment.

  For example, the configuration of the washing water supply means 8 does not provide the electromagnetic on-off valve 22 and the flow path switching valve 23 in series, but branches the water supply pipe R0 and provides an electromagnetic on-off valve in each branch flow path. The first water conduit R1 and the second water conduit R2 may be connected in communication with the on-off valve.

  Further, the third water conduit R3 and the zette water pipe 5 have been described separately for easy understanding, but the concept of the third water conduit R3 includes the zette water pipe 5 and It doesn't matter.

  Further, in the water supply control, after performing the zet cleaning using the third water conduit R3 in a state where the flow channel is switched to the second water conduit R2, the flow channel is again opened to seal the inside of the bowl portion 14. In the example described above, when switching to the first water conduit R1, the timing for switching the flow path and the timing for stopping the driving of the pump 72 have been described as being substantially simultaneous, but the timings of both need not necessarily match. For example, water may be discharged from the jet hole 51 when the bowl portion 14 is sealed with water.

  Furthermore, although the flush toilet 1 described above has been described as a configuration including the pump unit 7 in advance, for example, the pump unit 7 can be retrofitted to an existing tankless flush toilet. In that case, a space for disposing the valve unit 2 is secured in the functional part casing 13, and a decorative cover or the like is detachably attached in place of the collar part 19 provided at the rear part of the toilet body 10, The decorative cover and toilet body 10 may be provided with a space necessary for piping, an insertion hole, and the like in advance.

It is a front view of the flush toilet concerning this embodiment. It is a perspective view from the back of the flush toilet. It is a typical explanatory view of the flush toilet. It is explanatory drawing of piping containing the bull part unit accommodated in the same toilet bowl main body. It is a time chart at the time of washing in the flush toilet. It is explanatory drawing of an air release valve. It is explanatory drawing of a check valve.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Valve unit 3 Water pipe 4 Rim water passage 5 Zet water pipe 6 Water pipe 7 Pump unit 22 Electromagnetic on-off valve 23 Channel switching valve 51 Jet hole 71 Tank 72 Pump 73 Reservoir R1 First water conduit R2 First 2 waterway

Claims (6)

A rim water passing portion formed on the periphery of the upper opening of the toilet body,
A zet hole opened toward the trap inlet formed at the bottom of the toilet body,
A flush toilet capable of discharging wash water from the rim water passing portion and the jet hole, respectively.
The first water conduit and the second water conduit are connected to each other through the washing water supply means to the water supply pipe that is connected to the water pipe, and the first water conduit is connected to the rim water passing portion. The two water conduits are provided with a pump unit comprising a tank for storing water from the water pipe and a pump for supplying the water stored in the tank to the jet holes through the third water conduit. Featuring a flush toilet.   The flush toilet according to claim 1, wherein the pump unit is installed outside the toilet body. Water supply control means for supplying water at a predetermined timing to the rim water passing portion and the jet hole,
This water supply control means
After supplying water to the rim water passage, the flow path is switched from the first water conduit to the second water conduit and the pump is driven to supply water from the tank to the jet hole to discharge filth, Switch the flow path to the first water conduit and supply water to the rim water passage to seal the toilet body, and then switch the flow path to the second water conduit again to replenish the tank with a predetermined amount of water. The flush toilet according to claim 1 or 2, wherein the water supply is controlled so as to be performed.   4. The flush toilet according to claim 3, wherein water is supplied from the water pipe to the tank in synchronization with a water supply timing from the tank to the jet hole.   The flush toilet according to any one of claims 1 to 4, wherein an air release valve is provided in the middle of the third water conduit that connects the pump unit and the jet hole.   6. A flush toilet according to claim 5, wherein a check valve is attached to the downstream side of the atmosphere release valve provided in the third water conduit.

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