JP6274603B2 - Channel opening / closing device - Google Patents

Description

  The present invention relates to a flow path opening and closing device that starts supplying water to a toilet by receiving an instruction to start supplying water and autonomously stops supplying water by satisfying a predetermined condition.

  A so-called flash valve is known as such a channel opening / closing device. This flush valve accepts water from the primary flow path that is the water supply source and sends it to the primary internal flow path, and the flow that sends water from the secondary internal flow path to the secondary flow path that is the water supply destination. A main body formed with an outlet, a main valve (diaphragm valve) for opening and closing the flow path between the primary side internal flow path and the secondary side internal flow path, and the primary side internal flow path without going through the main valve And a secondary passage (relief valve) for opening and closing the bypass passage (see, for example, Patent Document 1 below).

  When the flush valve configured as described above performs an operation of opening the sub-valve such as depressing the operation lever, the bypass passage is opened and the back pressure of the main valve body constituting the main valve is reduced, and the primary side internal flow is reduced. The main valve body is pushed up by the primary pressure in the passage so as to be separated from the main valve seat, the main valve is opened, and water flows out from the outlet to the secondary side flow path. Thereafter, when the sub valve is closed such as returning the operation lever, or when the operation lever is automatically returned and the sub valve is closed, the bypass flow path is closed and the back pressure of the main valve body increases. As the back pressure of the main valve body increases, the main valve body descends so as to approach the main valve seat, and the main valve closes as the main valve body comes into contact with the main valve seat. Therefore, the flush valve functions as a flow path opening / closing device that starts water supply to the toilet upon receiving an instruction to start water supply and autonomously stops water supply when a predetermined condition is satisfied.

  A conventional flush valve is extremely useful as a device for delivering a certain amount of water with a relatively simple configuration, and is widely used as a means for supplying water to a urinal or a urinal. However, due to the structure of the conventional flush valve, it is difficult to strictly control the water volume. According to the Japanese Industrial Standard, the standard water discharge is 15L, and the water discharge is 11 ~ 16.5L if the water pressure is low. If possible, it is allowed, and if the water pressure is high, it is allowed if a water discharge amount of 13.5 to 19 L can be secured.

  As described above, the conventional flush valve has a different amount of water discharge due to fluctuations in water pressure. In addition, in a public space or the like, a plurality of toilets are generally installed in a form of being connected to each other. In some cases, the water pressure fluctuates, which causes a problem that the variation in the total water discharge amount in one cleaning operation is further increased. In order to solve this problem, conventional flush valve toilets are configured with a setting that increases the amount of water discharged so that filth can be discharged properly even when the water pressure is low or the water pressure fluctuation is large. ing. Therefore, particularly when the water pressure is high or in an environment where fluctuations in the water pressure are small, excess water has to be flowed. As a result, the amount of wasted water is extremely large, and a countermeasure in terms of water saving has been desired.

  Therefore, a so-called constant flow valve is incorporated in the flash valve, and even if the water pressure fluctuates in a high water pressure environment or in the primary side flow path, waste water is eliminated by keeping the flow rate of water sent to the secondary side flow path constant. A proposal intended to enhance performance has been made (see Patent Document 2 below).

JP 2006-170382 A JP 2011-226249 A JP 2014-040767 A

  In the case where the flow path opening / closing device in the conventional technique is provided in the water supply flow path to the siphon toilet, the closing speed of the main valve has been reduced in order to supply refill water to the siphon toilet. However, due to the cleaning operation in the siphon toilet, the siphon operation continues in the siphon toilet, and even if an attempt is made to supply refill water by reducing the closing speed of the main valve, the siphon toilet may be discharged from the siphon toilet. It became clear by examination of the present inventors.

  As a countermeasure, refill water is replenished by releasing the main valve again after a lapse of a predetermined time after the end of the cleaning operation (see Patent Document 3). However, opening the main valve to the extent that does not cause siphon action requires fine control of the main valve, and accuracy is required. In addition, there has been a problem that the operation frequency of the main valve is higher than in the past.

  Therefore, an object of the present invention is to provide a flow path opening / closing device that can reliably supply refilled water with a simple configuration even when attached to a water supply flow path to a siphon toilet.

  In order to solve the above problems, a flow path opening / closing apparatus according to the present invention starts water supply to a toilet by receiving an instruction to start water supply, and automatically stops water supply by satisfying a predetermined condition A main valve having a main valve body and a main valve seat for opening and closing a flow path between a primary flow path connected to a water supply source and a secondary flow path connected to a toilet that is a water supply destination; A constant flow means for adjusting the instantaneous flow rate of water flowing from the primary side flow path to the secondary side flow path, and the main valve body to be brought closer to the main valve seat by allowing water to flow from the primary side flow path. A back pressure chamber that causes back pressure to act on, a back pressure channel that communicates the primary side channel and the back pressure chamber, a bypass channel that connects the back pressure chamber and the secondary side channel, and a flow of the bypass channel A sub-valve capable of opening and closing the passage and adjusting the valve opening amount in at least two stages; a control unit for controlling the opening and closing of the sub-valve; The main valve is opened by lowering the back pressure of the back pressure chamber by setting the sub valve to the first valve opening amount, the main cleaning operation is performed to close the sub valve after supplying the main cleaning water, After the elapse of a predetermined time after the valve is closed, the primary valve and the secondary channel are connected via the back pressure chamber and the bypass channel without opening the main valve by setting the secondary valve to the second valve opening amount. A refill water supply operation for supplying refill water through communication is executed.

  According to the flow path opening / closing device of the present invention, the refill water is supplied after a lapse of a certain time after the main cleaning operation is completed. Refill water can be reliably supplied. Further, since the main valve is not opened during the refill water supply operation, the life of the main valve is improved. Furthermore, since the refill water is replenished using the sub valve having a smaller instantaneous flow rate than the main valve, the occurrence of siphon action can be reliably suppressed. Further, since the bypass channel can also be used as the refill water supply channel, there is no need to provide a separate channel for refill water supply, and the structure of the channel switching device can be simplified.

  Further, in the flow path opening and closing device according to the present invention, the valve body member in which the main valve body and the constant flow means are integrated, and the sliding direction of the valve body member so as to adjust the movable amount of the valve body member. It is also preferable that the refill water supply operation is performed after the position adjustment member returns to the initial position after the main cleaning operation is completed.

  In this preferable aspect, since the refill water supply operation is performed after the position adjusting member returns to the initial position, it is possible to prevent the main valve body from opening when the sub valve is set to the second valve opening amount. Therefore, variation in the amount of refill water to be supplied can be suppressed, and generation of wasted water and lack of refill water can be avoided.

  Moreover, it is also preferable that the flow path opening / closing apparatus according to the present invention is configured to be able to set whether or not to execute the refill water supply operation.

  In this preferred embodiment, when the refill water supply operation can be stopped when attached to a non-siphon toilet, it is possible to provide a flow path opening / closing device that supports various types of toilets.

  Further, the flow path opening and closing device according to the present invention includes a power storage unit that stores power for driving the subvalve, and the capacity of the power that can be stored by the power storage unit is at least when performing the refill water supply operation. It is also preferable that the electric power consumed by the sub valve and the control unit is larger.

  Since the flow path opening and closing device according to the present invention constitutes a series of cleaning operations by performing the main cleaning operation and the refill water supply operation, for example, when a power failure occurs after the main cleaning operation ends, only the main cleaning operation is performed. It is also assumed that the refill water supply operation is not completed. If the refill water supply operation is not completed, the refill water is insufficient, which may lead to odor backflow and pest infestation. Therefore, by installing a condenser and accumulating more power than the power consumed by the sub-valve and control unit when performing the refill water supply operation, the refill water supply operation can be completed even if a power failure occurs during cleaning. It is configured to be able to.

It is an external view which shows the state which attached the flush valve which is embodiment of this invention to the water supply pipe to a toilet bowl. It is a schematic block diagram which shows typically the internal structure of the flash valve which is embodiment of this invention. It is a side view which shows the constant flow valve body of the flash valve shown in FIG. It is a perspective view which shows the constant flow valve body of the flash valve shown in FIG. It is a block diagram of a multistage solenoid valve. It is a block block diagram which shows the example which provided the capacitor | condenser in the electric power supply system of the flash valve shown in FIG. FIG. 3 is a diagram showing an initial state in the flash valve shown in FIG. 2. FIG. 3 is a view showing a state where a main valve is opened in the flash valve shown in FIG. 2. FIG. 3 is a view showing a state where a main valve is closed in the flash valve shown in FIG. 2. FIG. 3 is a view showing a state in which the multistage solenoid valve 82 is set to a second valve opening amount for supplying refill water in the flush valve shown in FIG. 2. It is a figure which illustrates the structure which combines the control part of the flash valve shown in FIG. 1, and the control part of the toilet seat shown in the same figure.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  FIG. 1 shows a flash valve (flow path opening / closing device) according to an embodiment of the present invention. FIG. 1 is an external view showing a state in which a flush valve according to an embodiment of the present invention is attached to a water supply pipe to a toilet. As shown in FIG. 1, the flash valve SV (flow path opening / closing device) is attached in the middle of the water supply pipe TB to the toilet bowl SB. Upon receiving an instruction to start water supply, the flash valve SV opens a flow path through the water supply pipe TB and starts water supply to the toilet SB. Thereafter, the flash valve SV autonomously closes the flow path and stops water supply by satisfying a predetermined condition.

  The toilet bowl SB is provided with a sealing part SW. The sealed water SW is always filled with water to form a sealed water. If the toilet bowl SB is used, filth will be thrown into the sealing part SW. When the flush valve SV is operated after using the toilet bowl SB, washing water is supplied from the flush valve SV at a substantially constant instantaneous flow rate. By this washing water, the accumulated water and filth in the sealed water portion SW are poured. In the case of this embodiment, since the toilet bowl SB is a siphon type toilet bowl, the wash water is sucked downstream along with the filth by the siphon phenomenon. The flush valve SV of the present embodiment is configured to supply refilled water to the sealing portion SW after cleaning. The toilet bowl SB has a toilet seat SH.

  The flash valve SV includes a main body unit 10, a multistage solenoid valve 82 that is a sub valve, and a control unit CU. In the main body part 10, a primary side internal flow path 20 connected to the water supply pipe TB and a secondary side internal flow path 30 connected to the toilet SB are formed. A valve body member 40 is disposed in the main body 10. The valve body member 40 opens and closes the flow path between the primary side internal flow path 20 and the secondary side internal flow path 30. The multistage solenoid valve 82 is provided in the bypass flow path 80. The multistage solenoid valve 82 can switch the valve opening amount to two stages of the first valve opening amount and the second valve opening amount, and the valve opening amount is controlled by a control signal output from the control unit CU. . In the present embodiment, in the water supply pipe TB, a stop cock V is located upstream of the flush valve SV, a vacuum breaker VB is located downstream of the flush valve SV and upstream of the toilet SB. Has been placed.

  Next, the internal structure of the flash valve SV according to the embodiment of the present invention will be described with reference to FIG. FIG. 2 is a schematic configuration diagram schematically showing the internal structure of the flash valve SV.

  As shown in FIG. 2, the flash valve SV includes a main body 10. A primary side internal flow path 20, a secondary side internal flow path 30, a back pressure chamber 14, and a secondary back pressure chamber 12 are formed inside the main body 10. The primary side internal flow path 20 receives inflow water Wa from the primary side flow path (flow path upstream of the flush valve SV of the water supply pipe TB shown in FIG. 1) that is a water supply source, and receives the secondary side internal flow path. It flows out toward 30. An inlet 21 is provided at the upstream end of the primary side internal flow path 20. The inflow port 21 is an opening that receives the incoming water Wa and sends it out to the primary side internal flow path 20.

  The secondary-side internal flow path 30 converts the water flowing from the primary-side internal flow path 20 into a secondary-side flow path (a flow path downstream of the flush valve SV of the water supply tube TB shown in FIG. 1). This is to be discharged as the outflow water Wb. An outlet 31 is provided at the downstream end of the secondary side internal flow path 30. The outflow port 31 is an opening that sends out the effluent water Wb from the secondary side internal flow path 30 to the secondary side flow path.

  A valve body member 40 is disposed between the primary side internal flow path 20 and the secondary side internal flow path 30. The valve body member 40 is arranged such that one end on the downstream side is inserted into the secondary side internal flow path 30 and the other end on the opposite side faces the back pressure chamber 14. The valve body member 40 is disposed so as to freely advance and retract along the downstream direction of the secondary side internal flow path 30. The valve body member 40 is composed of a main valve body 42 provided in the upper part thereof and a constant flow valve body 44 provided in the lower part thereof, and both are integrally formed.

  The main valve body 42 is for opening and closing the flow path between the primary side internal flow path 20 and the secondary side internal flow path 30. The main valve body 42 has a main valve body surface 421 on the downstream surface. When the valve body member 40 is pushed most downstream, the main valve body surface 421 contacts the boundary surface of the primary side internal flow path 20 with respect to the secondary side internal flow path 30, and the primary side internal flow path 20 and the secondary side internal flow path It is comprised so that the distribution | circulation of the water between the flow paths 30 may be interrupted | blocked. Therefore, the boundary surface with which the main valve body surface 421 abuts functions as the main valve seat surface 201 (main valve seat).

  The constant flow valve body 44 is for adjusting the instantaneous flow rate of water flowing from the primary side internal flow path 20 to the secondary side internal flow path 30. The constant flow valve body 44 has a slit 442 formed in a groove shape on the outer side surface 441 thereof.

  The structure of the constant flow valve body 44 will be described in detail with reference to FIGS. FIG. 3 is a side view of the constant flow valve body 44, and FIG. 4 is a perspective view of the constant flow valve body 44. Four slits 442 are formed at equal intervals on the outer surface 441 of the constant flow valve body 44. Each slit 442 is a bottomed groove having a rectangular cross section, and is formed from the lower end of the outer surface 441 to the middle. The outer side surface 441 is formed so as to incline from the upper part toward the lower part, and is configured such that the overall diameter is reduced toward the lower part.

  The outer surface 441 of the constant flow valve body 44 faces the inner wall of the secondary side internal flow path 30 in the vicinity thereof. Therefore, when the valve body member 40 is lifted so as to allow water to pass between the primary side internal flow path 20 and the secondary side internal flow path 30 (direction to enter the back pressure chamber 14, backward direction, valve opening direction) Water flows into the secondary side internal flow path 30 and acts to increase the flow rate.

  When the valve body member 40 is lifted so as to allow water to pass between the primary side internal flow path 20 and the secondary side internal flow path 30 (the direction of entering the back pressure chamber 14, the retreat direction, and the valve opening direction), the primary side Water flows into the slit 442 from the internal flow path 20. At this time, the distance between the constant flow valve body 44 and the inner side wall of the secondary side internal flow path 30 increases as the valve body member 40 moves up. Since the diameter of the constant flow valve body 44 decreases toward the lower side, the cross-sectional area of the water flow path becomes wider and acts to increase the flow rate. The valve body member 40 rises so as to allow water to pass between the primary side internal flow path 20 and the secondary side internal flow path 30 (direction to enter the back pressure chamber 14), and then descends (direction toward the outlet 31). , Forward direction, valve closing direction), the distance between the constant flow valve body 44 and the inner side wall of the secondary side internal flow path 30 is reduced. As a result, the cross-sectional area of the water channel becomes narrower and acts to reduce the flow rate.

  Returning again to FIG. The outer surface 441 of the constant flow valve body 44 faces the inner wall of the secondary side internal flow path 30 in the vicinity thereof. Therefore, when the valve body member 40 is lifted so as to allow water to pass between the primary side internal flow path 20 and the secondary side internal flow path 30 (direction to enter the back pressure chamber 14, backward direction, valve opening direction) Water flows into the secondary side internal flow path 30.

  The main channel is a channel that passes through the space formed by the inner wall of the secondary side internal channel 30 and the slit 442 and flows into the secondary side internal channel 30. When the valve body member 40 is lifted so as to allow water to pass between the primary side internal flow path 20 and the secondary side internal flow path 30 (the direction of entering the back pressure chamber 14, the retreat direction, and the valve opening direction), the primary side Water flows into the slit 442 from the internal flow path 20. The valve body member 40 rises so as to allow water to pass between the primary side internal flow path 20 and the secondary side internal flow path 30 (direction to enter the back pressure chamber 14), and then descends (direction toward the outlet 31). , Forward direction, valve closing direction), water will flow into the upper part of the slit 442. As a result, the cross-sectional area of the water channel becomes narrower and acts to reduce the flow rate.

  The main valve body 42 is provided with an accommodation recess 46 on the upper side thereof. The housing recess 46 is formed in a concave shape so as to recede from the back pressure chamber 14 side. A sub valve seat 465 is provided on the back pressure chamber 14 side of the housing recess 46. The accommodation recess 46 is formed with a hole 461, a recess 462, and a sub-hole 463 (back pressure flow path).

  The hole 461 is formed as a communication hole that connects the primary side internal flow path 20 and the recess 462. The recess 462 accommodates the spring 50 and the auxiliary valve rod 48. A large-diameter portion 481 at the tip of the auxiliary valve rod 48 is disposed in the recess 462. The large diameter portion 481 is in contact with the spring 50 and urges the valve body member 40 toward the outlet 31 via the spring 50.

  The auxiliary valve rod 48 has a small diameter portion 483 extending in a rod shape and a large diameter portion 481 provided at the tip of the small diameter portion 483. The small diameter portion 483 passes through a communication path 464 (back pressure flow path) provided in the sub valve seat 465. A gap that allows water to flow is formed between the communication passage 464 and the small diameter portion 483. Accordingly, the water flowing into the recess 462 from the hole 461 flows into the back pressure chamber 14 through the communication path 464. Further, part of the water that has passed through the hole 461 flows to the back pressure chamber 14 through the sub-hole 463. When the communication path 464 is closed, all the water that has passed through the hole 461 flows to the back pressure chamber 14 through the auxiliary hole 463.

  The back pressure chamber 14 and the auxiliary back pressure chamber 12 are separated by a first position adjusting member 60. The first position adjustment member 60 is provided with a recess 601. The recess 601 is formed as a recess whose outer wall protrudes toward the back pressure chamber 14. A communication path 602 is formed at the lower end of the recess 601. A spring 70 having a linear characteristic is arranged on the back pressure chamber 14 side of the recess 601. One end of the spring 70 is accommodated in the recess 601 and the other end is disposed so as to contact the second position adjusting member 65.

  The second position adjusting member 65 includes a plate portion 651 formed in a disc shape on one end side thereof, a shaft portion 652, and a holding portion 653. The lower end of the shaft portion 652 is exposed from the lower surface of the plate portion 651, and is arranged so as to contact or be separated from one end of the small diameter portion 483 of the auxiliary valve rod 48. The second position adjusting member 65 is disposed so as to penetrate the center of the winding of the spring 70 and is fixed to the main body 10.

  A protrusion 101 that protrudes upward at the center is formed at the top of the main body 10. A through hole 102 whose central axis is the vertical direction is formed at the center of the protruding portion 101, and is screwed and fixed to the through hole 102 in a state where a cylindrical holding member 653 is inserted. A plate portion 651 is attached to the tip of the holding member 653.

  The second position adjusting member 65 has a shaft portion 652 that is a rod-shaped portion, and the shaft portion 652 is disposed so as to penetrate the holding member 653.

  The protruding portion 101 is formed with a through hole that communicates with the holding member 653 from the outer surface thereof, and a fixing hole 107 in which a female screw is formed on the inner peripheral surface thereof. For this reason, the user adjusts the position of the second position adjusting member 65 in the vertical direction and then inserts a not-shown potato screw into the fixing hole 107 so that the second position adjusting member 65 is attached to the main body portion 10 thereafter. It can prevent rotating with respect to it.

  As described above, the second position adjusting member 65 is fixed to the main body 10 of the flash valve SV in a state where it communicates from the outside. The fixed position of the second position adjusting member 65 can be adjusted from the outside using a tool such as a wrench.

  The first position adjusting member 60 is applied to the force pushed by the pressure difference between the auxiliary back pressure chamber 12 and the back pressure chamber 14, the force that the spring 70 tries to counter, and the first adjusting member 60 and the valve body member 40. Depending on the balance with the sliding resistance, the secondary back pressure chamber 12 is slid so as to widen (back pressure chamber 14 is narrowed), or the secondary back pressure chamber 12 is narrowed (back pressure chamber 14 is widened). It is configured so that. The water that has entered the back pressure chamber 14 flows to the bypass flow path 80 side through the communication path 602.

  The auxiliary back pressure chamber 12 is configured so that the same pressure as the primary pressure applied to the primary side internal flow path 20 is applied. Specifically, the primary side internal flow path 20 and the auxiliary back pressure chamber 12 are connected by the auxiliary primary flow path 22, and the primary pressure is transmitted to the auxiliary back pressure chamber 12.

  The back pressure chamber 14 and the secondary side internal flow path 30 are connected by a bypass flow path 80. The bypass flow path 80 is provided with a multistage solenoid valve 82 as a sub valve. The multistage solenoid valve 82 will be described with reference to FIG. FIG. 5 is a configuration diagram showing the configuration of the multistage solenoid valve 82.

  The multi-stage solenoid valve 82 includes two first solenoid valves 821 and a second solenoid valve 822. By combining the opening and closing of the two first solenoid valves 821 and the second solenoid valve 822, the multi-stage solenoid valve 82 is provided. The valve opening amount 82 can be switched between two stages of a first valve opening amount and a second valve opening amount. The bypass flow path 80 is branched into two flow paths: a flow path connected to the first electromagnetic valve 821 and a flow path connected to the second electromagnetic valve 822.

  Specifically, if both the first solenoid valve 821 and the second solenoid valve 822 are opened, the valve opening amount of the multistage solenoid valve 82 is the first valve opening amount that is fully opened. If the first solenoid valve 821 is closed and the second solenoid valve 822 is opened, the valve opening amount of the multistage solenoid valve 82 is a second valve opening amount that is smaller than the first valve opening amount. .

  As shown in FIG. 5, the cross-sectional area of the bypass flow path 80 opened and closed by the second electromagnetic valve 822 is narrower than the cross-sectional area of the bypass flow path 80 opened and closed by the first electromagnetic valve 821. It is configured as follows. By doing in this way, the water flow amount when it is set as the 2nd valve opening amount can be decreased more.

  Furthermore, the bypass passage 80 is opened and closed by the second solenoid valve 822 so that the valve body member 40 does not rise when the multistage solenoid valve 82 is set to the second valve opening amount when refill water is supplied. Therefore, the flow passage cross-sectional area of the sub hole 463 formed in the valve body member 40 is narrower. In this way, when the multistage solenoid valve 82 is set to the second valve opening amount, the flow rate of water flowing from the back pressure chamber 14 through the bypass flow path 80 to the secondary side internal flow path 30 is larger than the flow rate of water. The amount of water that can flow into the back pressure chamber 14 from the primary side internal flow path 20 through the auxiliary hole 463 becomes larger.

  Therefore, when the multistage solenoid valve 82 is set to the first valve opening amount, the multistage solenoid valve 82 is fully opened, so that water in the back pressure chamber 14 passes through the bypass flow path 80 and enters the secondary side internal flow path 30. The back pressure in the back pressure chamber 14 decreases. Thereby, the valve body member 40 is pushed up by the pressure difference between the primary pressure applied to the valve body member 40 and the back pressure, and the main flow path is opened.

  On the other hand, when the multistage solenoid valve 82 is set to the second valve opening amount, only the second solenoid valve 822 is opened, so that the back pressure in the back pressure chamber 14 slightly decreases, but the second solenoid valve 822 opens and closes it. Since the flow passage cross-sectional area is narrower than the flow passage cross-sectional area of the sub-hole 463, the flow rate of water flowing from the back pressure chamber 14 through the bypass flow passage 80 to the secondary side internal flow passage 30 is The amount of water that can flow into the back pressure chamber 14 from the primary side internal flow path 20 through the auxiliary hole 463 becomes larger. Therefore, the pressure difference between the back pressure in the back pressure chamber 14 and the primary pressure applied to the valve body member 40 does not occur or is small even if it occurs, so the valve body member 40 does not rise. Therefore, the refill water can be supplied through the back pressure chamber 14 and the bypass flow path 80 without opening the main flow path by setting the multistage solenoid valve 82 to the second valve opening amount.

  As described above, the multistage solenoid valve 82 that is a sub-valve can adjust the valve opening amount in two stages, that is, the first valve opening amount and the second valve opening amount.

  In addition, when both the first electromagnetic valve 821 and the second electromagnetic valve 822 are closed, the multistage electromagnetic valve 82 is closed. Accordingly, since the flow path from the back pressure chamber 14 to the secondary internal flow path 30 through the bypass flow path 80 is not formed, the back pressure in the back pressure chamber 14 is equal to the primary pressure applied to the primary internal flow path 20. Therefore, the valve body member 40 does not rise and the main flow path is closed.

  The flash valve SV according to the embodiment of the present invention includes power storage means CD that stores power for driving the multistage solenoid valve 82 that is a sub-valve. An example in which a capacitor is provided as power storage means will be described with reference to FIG. FIG. 6 is a block configuration diagram illustrating an example in which a capacitor CD is provided in the power supply system of the present embodiment.

  As shown in FIG. 6, power is supplied to a load LD (a general term for electrically driven parts such as the multistage solenoid valve 82 and the control unit CU) from a power supply AS that is an AC power supply and a backup battery BT. Yes. Between the power supply AS and the load LD, a diode REa that is a rectifying element is disposed. Between the backup battery BT and the load LD, a diode REb that is a rectifying element is disposed. A capacitor CD as a power storage unit is provided between the diode REa and the diode REb and the load LD.

  The capacity of the electric power that can be stored by the condenser CD is configured to be larger than the electric power consumed by the multistage solenoid valve 82 and the control unit CU when the refill water supply operation is performed.

  Subsequently, the operation of the flash valve SV of the present embodiment will be described with reference to FIGS. FIG. 7 is a diagram showing an initial state of the flash valve shown in FIG. FIG. 8 is a view showing a state where the main valve is opened in the flash valve shown in FIG. FIG. 9 is a view showing a state where the main valve is closed in the flash valve shown in FIG. 2. FIG. 10 is a diagram showing a state where the multistage solenoid valve 82 is set to the second valve opening amount in order to supply refill water in the flush valve shown in FIG. In each of FIGS. 7 to 10, (A) shows the movement of the flash valve SV, and (B) shows the corresponding instantaneous flow rate, the lift amount of the valve body member 40, the sealing depth of the sealing portion SW, and the multistage solenoid valve. A valve opening amount of 82 is shown.

  As shown in FIG. 7, the multistage solenoid valve 82 is closed before time t1. Therefore, the back pressure in the back pressure chamber 14 is equal to the primary pressure applied to the primary side internal flow path 20, and the valve body member 40 is closed due to the pressure difference between the back pressure chamber 14 and the secondary side internal flow path 30. It is in a state. The first position adjusting member 60 is pushed up by the spring 70 because there is no pressure difference between the auxiliary back pressure chamber 12 and the back pressure chamber 14. That is, in the initial state of FIG. 7 (before time t1), the valve body member 40 and the first position adjusting member 60 are in the initial position, and the instantaneous flow rate is also zero. In addition, the sealing water has a prescribed depth.

  Subsequently, as shown in FIG. 8, at time t1, a main cleaning operation in which the multistage solenoid valve 82 is the first valve opening amount is executed. When the multistage solenoid valve 82 reaches the first valve opening amount, the water in the back pressure chamber 14 passes through the bypass flow path 80 to the secondary side internal flow path 30, so that the back pressure in the back pressure chamber 14 decreases. . As a result, the valve body member 40 is pushed up by the pressure difference between the primary pressure applied to the valve body member 40 and the back pressure chamber 14, so that the main flow path is opened and the supply of the main wash water to the toilet SB is started. The

  Simultaneously with the rise of the valve body member 40, the first position adjusting member 60 is also pushed down to the back pressure chamber 14 side by the pressure difference between the back pressure chamber 14 and the auxiliary back pressure chamber 12. Accordingly, the valve body member 40 moves up until it comes into contact with the first position adjusting member 60. Further, when the valve body member 40 is raised, the auxiliary valve rod 48 comes into contact with the second position adjusting member 65 and the communication passage 464 is opened.

  In the state of FIG. 8, the main washing water continues to flow to the toilet SB side, and when the predetermined time t2 comes, the multistage solenoid valve 82 is closed. By closing the multistage solenoid valve 82, water that has entered the back pressure chamber through the sub-hole 463 and the communication passage 464 cannot be discharged from the bypass flow path 80 to the secondary-side internal flow path 30. Therefore, the back pressure in the back pressure chamber 14 is restored. Then, as shown in FIG. 9, the valve body member 40 starts to descend due to the back pressure in the back pressure chamber 14, the main valve body 42 comes into contact with the main valve seat surface 201 at time t3, and the main flow path is closed. Further, since the back pressure in the back pressure chamber 14 is restored, the valve body member 40 is pushed down, and at the same time, the first position adjusting member 60 also eliminates the pressure difference between the auxiliary back pressure chamber 12 and the back pressure chamber 14. The spring 70 is pushed up to the initial position and returns to the initial position.

  Wash water is supplied to the toilet SB from time t2 to time t3 from when the multistage solenoid valve 82 is closed until the valve body member 40 closes the main flow path. At the time t3, the supply of the washing water is finished and the siphon of the toilet bowl SB is finished, so that there is a slight time difference and the sealing depth of the sealing part SW increases (time t4).

Even at time t4, since the sealing depth of the sealing portion SW is not secured to the initial sealing depth, as shown in FIG. 10, the multistage solenoid valve 82 is opened from the time t4 to the time t5 by the second valve opening amount. The refill water supply operation is executed. In the refill water supply operation, the wash water supplied from the primary side internal flow path 20 passes through the sub-hole 463, the back pressure chamber 14, the bypass flow path 80, the second electromagnetic valve 822, and the secondary side internal flow path 30, and is refilled. The water is supplied to the toilet SB.

  At this time, by setting the second electromagnetic valve 822 to the second valve opening amount, the back pressure in the back pressure chamber 14 slightly decreases, but the cross-sectional area of the flow path opened and closed by the second electromagnetic valve 822 is a sub-hole. Since the flow path cross-sectional area of 463 is narrower than the flow rate of water flowing from the back pressure chamber 14 through the bypass flow path 80 to the secondary internal flow path 30, The amount of water that can flow into the back pressure chamber 14 through 463 becomes larger. Therefore, the pressure difference between the back pressure in the back pressure chamber 14 and the primary pressure applied to the valve body member 40 does not occur or is small even if it occurs, so the valve body member 40 does not rise. Therefore, the refill water can be supplied through the back pressure chamber 14 and the bypass flow path 80 without opening the main flow path by setting the multistage solenoid valve 82 to the second valve opening amount. Moreover, since the flow rate of the refill water supplied by opening the second electromagnetic valve 822 is smaller than the flow rate of the main washing water, the siphon phenomenon does not occur in the toilet SB by supplying the refill water.

  Further, the back pressure in the back pressure chamber 14 may not completely return to the same primary pressure as the initial state until the first position adjusting member 60 returns to the initial position. Therefore, if the multistage solenoid valve 82 is set to the second valve opening amount before the first position adjusting member 60 returns to the initial position, the valve body member 40 rises and the main flow path is opened. However, in the flash valve SV of the present embodiment, the first position adjusting member 60 has returned to the initial position at time t4, and the back pressure in the back pressure chamber 14 has completely returned to the same primary pressure as in the initial state. Therefore, the valve body member 40 does not open even when the multistage solenoid valve 82 is set to the second valve opening amount.

  Further, when the multistage solenoid valve 82 is set to the second valve opening amount, since the instantaneous flow rate of the cleaning water supplied to the toilet SB is small, even if the primary pressure fluctuates, the instantaneous flow rate during the refill water supply operation Is less affected. Therefore, by controlling the time (time t4 to time t5) for executing the refill water supply operation, the supply amount of the refill water can be adjusted with high accuracy, and the refill water can be supplied to the toilet SB without excess or deficiency. Is possible.

  As described above, in the flush valve SV of the present embodiment, the multistage solenoid valve 82, which is the sub valve, is set to the first valve opening amount, thereby reducing the back pressure in the back pressure chamber 14 and opening the main valve to perform main cleaning. After supplying water, a main cleaning operation for closing the multistage solenoid valve 82 is performed. After a predetermined time (from time t2 to time t4) has elapsed since the multistage solenoid valve 82 was closed, the multistage solenoid valve 82 is moved to the second stage. Refill water supply for supplying refill water by connecting the primary side flow path 20 and the secondary side flow path 30 through the back pressure chamber 14 and the bypass flow path 80 without opening the main valve. The operation is executed (see FIGS. 7 to 10).

  According to the present embodiment, the refill water is supplied after a lapse of a certain time after the main cleaning operation is completed, so that the refill water necessary for sealing water can be surely supplied without discharging the makeup water by the siphon action. Can be supplied to. Further, since the main valve is not opened during the refill water supply operation, the life of the main valve is improved. Furthermore, since the refill water is replenished using the sub valve having a smaller instantaneous flow rate than the main valve, the occurrence of siphon action can be reliably suppressed. Further, since the bypass channel 80 can also be used as the refill water supply channel, there is no need to provide a separate channel for refill water supply, and the structure of the channel switching device SV can be simplified.

  In the refill water supply operation of the present embodiment, after the main cleaning operation ends, the first position adjustment member 60 returns to the initial position, and then the refill water supply operation is executed.

  By doing in this way, after the back pressure of the back pressure chamber 14 that has been reduced by the main cleaning operation is completely restored to the same primary pressure as in the initial state, the second stage multi-stage solenoid valve 82 is moved to the second state. Therefore, when the multistage solenoid valve 82 is set to the second valve opening amount, the main valve body can be prevented from opening. Therefore, variation in the amount of refill water to be supplied can be suppressed, and generation of wasted water and lack of refill water can be avoided.

  In addition, it is also preferable that the refill water supply operation can be set to be executed or not.

  In this preferred embodiment, when the refill water supply operation can be stopped when attached to a non-siphon toilet, it is possible to provide a flow path opening / closing device that supports various types of toilets.

  In this embodiment, the power storage means for storing power for driving the multi-stage solenoid valve 82 as a sub valve is provided, and the capacity of power that can be stored by the power storage means is at least when performing the refill water supply operation. It is also preferable that the electric power consumed by the multistage solenoid valve 82 and the control unit CU is larger.

  Since the flush valve SV of the present embodiment constitutes a series of cleaning operations by performing the main cleaning operation and the refill water supply operation, for example, when a power failure occurs after the main cleaning operation ends, only the main cleaning operation is performed. It is also assumed that the refill water supply operation is not completed. If the refill water supply operation is not completed, the refill water is insufficient, which may lead to odor backflow and pest infestation. Therefore, by providing a condenser CD and accumulating power larger than the power consumed by the sub-valve and the controller when performing the refill water supply operation, the refill water supply operation is completed even if a power failure occurs during cleaning. It is configured to be able to.

  In the above-described embodiment, an example in which the control unit CU that controls the multistage solenoid valve 82 that is a sub valve is built in the flash valve SV has been described. However, the control unit CU is not necessarily limited to being built in the flash valve SV, and may be provided anywhere as long as the multistage electromagnetic valve 82 can be controlled.

  FIG. 11 shows an example in which the control unit CU is provided in the toilet seat SH. In providing the control unit CU in the toilet seat SH, the control unit CU described above may be provided in the toilet seat SH as it is, or the control unit provided in the toilet seat SH may be knitted to fulfill the function of the control unit CU. Good. With this configuration, when the toilet seat SH has a temperature adjustment mechanism (a heater and a control circuit that drives the heater) that adjusts the temperature of the seat surface, the control unit CU controls the temperature adjustment mechanism. Can be configured.

  As described above, the control unit CU that controls the multistage solenoid valve 82 and the control unit that controls the temperature adjustment mechanism that adjusts the temperature of the toilet seat SH can be integrated into one control unit. The configuration can be simplified.

  Moreover, in this embodiment mentioned above, the multistage type solenoid valve 82 demonstrates the example which adjusts valve opening amount in two steps by combining opening and closing of two solenoid valves, the 1st solenoid valve 821 and the 2nd solenoid valve 822. did. However, the multistage solenoid valve 82 is not necessarily limited to this form, and the valve opening amount is at least two steps, such as a thing that adjusts the valve opening amount to two steps by changing the amount of current supplied to the solenoid valve. Any device can be used as long as it can be adjusted.

SV: Flush valve (channel opening / closing device)
SB: Toilet bowl SW: Sealing part TB: Water supply pipe V: Stop cock VB: Vacuum breaker CU: Control part 10: Main part 101: Protruding part 102: Through hole 107: Fixing hole 12: Secondary back pressure chamber 14: Back pressure chamber 20: Primary side internal flow passage 201: Main valve seat surface (main valve seat)
21: Inflow port 22: Sub primary flow path 30: Secondary side internal flow path 31: Outlet port 40: Valve body member 42: Main valve body 421: Main valve body surface 44: Constant flow valve body 441: Outer surface 442: Slit 46: accommodation recess 461: hole 462: recess 463: auxiliary hole (back pressure flow path)
464: Communication path (back pressure flow path)
465: Sub valve seat 48: Sub valve rod 481: Large diameter portion 482: Sub valve body 483: Small diameter portion 50: Spring 60: First position adjustment member 601: Recess 602: Communication path 65: Second position adjustment member 651: Plate portion 652: Shaft portion 653: Holding member 70: Spring 80: Bypass flow path 82: Multistage solenoid valve 821: First solenoid valve 822: Second solenoid valve Wa: Inflow water Wb: Outflow water CD: Condenser LD: Load AS: power supply BT: backup battery REa: diode REb: diode

Claims (4)

A channel opening and closing device that starts supplying water to a toilet by receiving an instruction to start water supply, and autonomously stops water supply by satisfying a predetermined condition,
A main valve body having a main valve body and a main valve seat that opens and closes a flow path between a primary flow path connected to a water supply source and a secondary flow path connected to a toilet that is a water supply destination;
Constant flow means for adjusting the instantaneous flow rate of water flowing from the primary side flow path to the secondary side flow path to be constant;
A back pressure chamber that causes back pressure to act so that the main valve body approaches the main valve seat when water flows from the primary side flow path;
A back pressure channel for communicating the primary side channel and the back pressure chamber;
A bypass flow path connecting the back pressure chamber and the secondary flow path;
A sub-valve capable of opening and closing the bypass channel and adjusting the valve opening amount in at least two stages;
A control unit for controlling the opening and closing of the auxiliary valve,
The main valve is opened by lowering the back pressure in the back pressure chamber by setting the sub valve to the first valve opening amount, and after the main cleaning water is supplied, the main cleaning operation is performed to close the sub valve,
After the predetermined time has elapsed after the subvalve is closed, the primary valve can be opened through the back pressure chamber and the bypass channel without opening the main valve by setting the subvalve to a second valve opening amount. A flow path opening and closing device that performs a refill water supply operation of communicating a path and the secondary side flow path to supply refill water. A valve body member in which the main valve body and the constant flow means are integrated;
A position adjusting member that moves at least a part of the valve body member along a sliding direction so as to adjust a movable amount of the valve body member,
2. The flow path opening / closing device according to claim 1, wherein after the main cleaning operation is finished, the refill water supply operation is executed after the position adjusting member returns to the initial position.   The flow path opening and closing device according to claim 1 or 2, wherein the refill water supply operation can be set to be executed or not. Power storage means for storing power for driving the auxiliary valve;
The capacity of the power that can be stored by the power storage means is larger than at least the power consumed by the sub valve and the control unit when performing the refill water supply operation. Channel opening / closing device.