JP6366002B2 - 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 twice the operation frequency of the main valve as compared with the prior art channel opening and closing device, so durability is required and siphon action does not occur Thus, it was necessary to finely control the valve opening amount of the main valve.

  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.

  The present invention is a flow path opening and closing device that starts water supply to a toilet by receiving an instruction to start water supply and autonomously stops water supply by satisfying a predetermined condition, and is a primary side flow that leads to a water supply source A main valve having a main valve body and a main valve seat that opens and closes a flow path between the road and a secondary flow path connected to a toilet that is a water supply destination, and water that flows from the primary flow path to the secondary flow path A constant flow means for adjusting the instantaneous flow rate of the valve to be constant, a back pressure chamber for applying back pressure to bring the main valve body closer to the main valve seat by flowing water from the primary side flow path, and the primary side A back pressure flow path that connects the flow path and the back pressure chamber, a bypass flow path that connects the back pressure chamber and the secondary flow path without being interposed between the main valve body and the main valve seat, and a bypass flow path A first sub-valve that opens and closes the flow path, a refill water supply flow path that connects the primary flow path and the secondary flow path, and a flow path opening and closing of the refill water supply flow path A second sub-valve to perform, and a controller for controlling opening and closing of the first sub-valve and the second sub-valve, and opening the main valve by reducing the back pressure in the back pressure chamber by opening the first sub-valve After supplying the main cleaning water, the main sub-valve is closed to increase the back pressure in the back pressure chamber to close the main valve, and after a predetermined time has elapsed after the first sub-valve is closed, A flow path opening / closing device that performs a refill water supply operation of supplying refill water through a refill water supply flow path by opening a second sub valve.

  According to the flow path opening and closing device of the present invention, the refill water supply flow path is a dedicated flow path for supplying the refill water, so that the primary side flow path and the second flow path are not interposed between the main valve body and the main valve seat. The refill water can be supplied by the refill water replenishment flow path communicating with the secondary flow path. Further, by setting the flow rate of the refill water supply flow path so as not to generate siphon during the refill water supply operation, it is possible to reliably supply the amount of refill water necessary for sealing water. In addition, after the first sub-valve is closed, the refill water necessary for sealing the toilet bowl is supplied from the refill water replenishment flow channel after a certain time has elapsed, so that the refill water is drained by the siphon phenomenon caused by the main washing. Can be prevented.

  Further, in the flow path opening and closing device according to the present invention, the constant flow rate means is configured by adjusting the movable amount of the main valve body by a position adjusting member that moves along the sliding direction of the main valve body. A sub-back pressure chamber that is provided on the opposite side of the back pressure chamber across the member and that causes the back pressure to act so that the position adjustment member is brought closer to the main valve body by flowing water from the primary side flow path, and the primary side A sub-primary flow channel that communicates the flow channel and the sub-back pressure chamber, and the refill water supply flow channel branches off from the sub-primary flow channel, and the primary flow channel and the secondary flow channel communicate with each other. Is also preferable.

  According to this preferred aspect, since the refill water supply channel is in communication with the sub-primary channel, when the second sub-valve is opened, water flows out from the sub-back pressure chamber to the secondary channel side, and the position adjusting member The back pressure applied to can be released. Therefore, the position adjustment member can be returned to the initial position in a short time by closing the first sub valve and opening the second sub valve after the supply of the cleaning water is stopped. The time until it can be supplied can be shortened.

  The flow path opening / closing apparatus according to the present invention further includes a flow path adjustment mechanism that is attached to the sub primary flow path and that can adjust the flow cross-sectional area of the sub primary flow path. The refill water replenishment flow path communicates with the sub primary flow path and the communication hole through the inside of the flow path adjustment mechanism, thereby communicating with the primary side flow path in the previous period. It is also preferable to connect the secondary flow path.

  According to this preferred aspect, the sub-primary flow path and the refill water supply flow path are communicated with each other via the flow path adjustment mechanism, so that an opening for the refill water supply flow path is separately provided in the flow path opening / closing device. In addition, the refill water supply channel can be easily formed, and the structure of the channel switching device can be simplified.

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 sectional drawing which shows the internal structure of the flash valve which is embodiment of this invention. It is a fragmentary sectional view which shows the state which replaced the cross-sectional area adjustment member of FIG. 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 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 the first sub valve is opened and the 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 where the second sub valve is opened to supply 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 portion 10, an electromagnetic valve 82 that is a first sub valve, an electromagnetic valve 83 that is a second sub valve, and a control unit CU. In the main body 10, a primary side flow path 20 connected to the water supply pipe TB and a secondary side flow path 30 connected to the toilet bowl SB are formed. A main valve 40 is disposed in the main body 10. The main valve 40 opens and closes the flow path between the primary side flow path 20 and the secondary side flow path 30. The electromagnetic valve 82 is provided in the bypass flow path 80. By opening the electromagnetic valve 82, the back pressure of the main valve 40 is lowered and opened. Further, by opening the electromagnetic valve 83, refill water can be supplied without opening the main valve 40. The opening and closing of the solenoid valve 82 and the solenoid valve 83 are 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 cross-sectional view 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 flow path 20, a secondary side 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 flow path 20 receives inflow water Wa from a water supply source (flow path upstream of the flush valve SV of the water supply pipe TB shown in FIG. 1), and flows it out toward the secondary side flow path 30. is there. An inlet 21 is provided at the upstream end of the primary channel 20. The inflow port 21 is an opening that receives the inflow water Wa and sends it out to the primary channel 20.

  The secondary side flow path 30 causes the water flowing in from the primary side flow path 20 to flow out to the water supply destination (flow path downstream of the flush valve SV of the water supply pipe TB shown in FIG. 1) as effluent water Wb. . An outlet 31 is provided at the downstream end of the secondary channel 30. The outflow port 31 is an opening through which the effluent water Wb is sent out from the secondary channel 30.

  A main valve 40 that opens and closes the flow path between the primary side flow path 20 and the secondary side flow path 30 is disposed between the primary side flow path 20 and the secondary side flow path 30. The main valve 40 is arranged such that one end on the downstream side is inserted into the secondary flow path 30 and the other end on the opposite side faces the back pressure chamber 14. The main valve 40 is disposed so as to be able to advance and retract along the downstream direction of the secondary side flow path 30, and includes a main valve body 42 provided at an upper portion thereof and a main valve seat surface 201 formed on the main body 10. It is configured.

  The main valve body 42 has a main valve body surface 421 on the downstream surface. When the main valve 40 is pushed most downstream, the main valve body surface 421 comes into contact with the boundary surface of the primary side flow path 20 with respect to the secondary side flow path 30, and the primary side flow path 20 and the secondary side flow path 30 are in contact with each other. It is configured to block the flow of water between them. 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 formed on the main valve body 42 side of the main valve 40 and is for adjusting the instantaneous flow rate of water flowing from the primary side flow path 20 to the secondary side 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. 4 is a side view of the constant flow valve body 44, and FIG. 5 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 is opposed to the inner wall of the secondary side flow path 30 in proximity. Accordingly, when the main valve 40 is lifted so as to allow water to pass between the primary side flow path 20 and the secondary side flow path 30 (in the direction of entering the back pressure chamber 14, the reverse direction, the valve opening direction), It flows into the secondary channel 30 and acts to increase the flow rate.

  When the main valve 40 is lifted so as to allow water to pass between the primary side flow path 20 and the secondary side flow path 30 (in the direction of entering the back pressure chamber 14, the backward direction, and the valve opening direction), the primary side flow path 20 Water flows into the slit 442. At this time, the distance between the constant flow valve body 44 and the inner wall of the secondary side flow path 30 increases as the main valve 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 main valve 40 ascends (direction to enter the back pressure chamber 14) so as to pass water between the primary side flow path 20 and the secondary side flow path 30, and then descends (direction toward the outflow port 31, forward direction) , In the valve closing direction), the distance between the constant flow valve body 44 and the inner wall of the secondary side 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 is opposed to the inner wall of the secondary side flow path 30 in proximity. Accordingly, when the main valve 40 is lifted so as to allow water to pass between the primary side flow path 20 and the secondary side flow path 30 (in the direction of entering the back pressure chamber 14, the reverse direction, the valve opening direction), It flows into the secondary channel 30.

  The main channel is a channel that passes through the space formed by the inner wall of the secondary channel 30 and the slit 442 and flows into the secondary channel 30. When the main valve 40 is lifted so as to allow water to pass between the primary side flow path 20 and the secondary side flow path 30 (in the direction of entering the back pressure chamber 14, the backward direction, and the valve opening direction), the primary side flow path 20 Water flows into the slit 442. The main valve 40 ascends (direction to enter the back pressure chamber 14) so as to pass water between the primary side flow path 20 and the secondary side flow path 30, and then descends (direction toward the outflow port 31, forward direction) In the valve closing direction), water flows into the upper portion 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 channel 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 main valve 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 secondary channel 30 are connected by a bypass channel 80. The bypass flow path 80 is provided with a solenoid valve 82 as a first sub valve. If the electromagnetic valve 82 is closed, the primary pressure is applied to the inside of the back pressure chamber 14 by the water flowing into the back pressure chamber 14 through the hole 461 or the communication passage 464. On the other hand, when the electromagnetic valve 82 is opened, the water in the back pressure chamber 14 flows out from the bypass flow path 80 to the secondary flow path 30, and the internal pressure of the back pressure chamber 14 decreases.

  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 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 includes a force pushed by a pressure difference between the auxiliary back pressure chamber 12 and the back pressure chamber 14, a force that the spring 70 tries to counter, and a slide applied to the first adjusting member 60 and the main valve 40. Depending on the balance with the dynamic 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). Is configured to do.

  The auxiliary back pressure chamber 12 is configured so that the same pressure as the primary pressure applied to the primary flow path 20 is applied. Specifically, the primary 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 secondary primary flow path 22 extends upward from the primary side flow path 20 and is bent at a substantially right angle toward the secondary back pressure chamber 12. In the middle of the sub-primary flow path 22, an opening 222 that connects the inside of the sub-primary flow path 22 and the outside of the main body 10 is formed. The axial center of the opening 222 is formed to be substantially concentric with the axial center of the boundary end surface between the secondary primary flow path 22 and the secondary back pressure chamber 12. In addition, the first cross-sectional area adjusting member 226 is screwed and fixed to the opening 222 (see FIG. 2). The first cross-sectional area adjusting member 226 can be removed with a tool and can be replaced with the second cross-sectional area adjusting member 228 (see FIG. 3).

  The first cross-sectional area adjusting member 226 is formed in a substantially cylindrical shape, and its outer shape closes the secondary primary flow path 22. An internal flow path 226a that penetrates through the first cross-sectional area adjustment member 226 is provided inside the first cross-sectional area adjustment member 226, and the secondary primary flow path 22 and the internal flow path 226a are communicated with each other by a side opening 226c. Yes. An end opening 226d is provided on the side of the sub-back pressure chamber 12 of the internal flow path 226a. The end opening 226d secures a cross-sectional area of the flow path, and the sub-primary flow path 22 and the sub-back pressure chamber 12 Can be communicated. The primary flow path 20 and the secondary back pressure chamber 12 communicate with each other through the internal flow path 226a, and the secondary back pressure chamber 12 is subjected to the same pressure as the primary pressure applied to the primary flow path 20 to the secondary back pressure chamber 12. Applies a back pressure so as to bring the first position adjusting member 60 closer to the main valve 40. In addition, a communication hole 226b is formed on the side opposite to the end opening 226d of the internal flow path 226a to connect the sub primary flow path 22 and the outside of the main body 10. One end of a refill water supply channel 90 described later is connected to the communication hole 226b.

  The second cross-sectional area adjusting member 228 that can be interchanged with the first cross-sectional area adjusting member 226 is formed in a substantially cylindrical shape, and its outer shape closes the secondary primary flow path 22. Although the internal flow path 228a, the side opening 228c, and the communication hole 228b are also formed in the second cross-sectional area adjusting member 228, the end opening on the auxiliary back pressure chamber 12 side is not provided. Therefore, since the secondary primary flow path 22 and the secondary back pressure chamber 12 are closed by the second cross-sectional area adjusting member 228, the primary pressure applied to the primary flow path 22 is not applied to the secondary back pressure chamber 12. Therefore, the secondary back pressure chamber 12 does not act on the back pressure that causes the first position adjusting member 60 to approach the main valve 40, and the second cross-sectional area adjusting member 228 is inserted into the opening 222 and screwed and fixed. When it is, the 1st position adjustment member 60 does not move irrespective of the flow path concerning the primary side flow path 20, ie, supply water pressure. In addition, one end of a refill water supply passage 90 described later is connected to the communication hole 228b. Accordingly, the opening 222, the first cross-sectional area adjusting member 226, and the second cross-sectional area adjusting member 228 function as a flow path adjusting mechanism that can adjust the cross-sectional area of the sub primary flow path 22.

  One end of the refill water supply channel 90 is connected to the first sectional area adjusting member 226 or the communication hole (226b, 228b) of the second sectional area adjusting member 228, and the other end is connected to the secondary side channel 30. It is connected. An electromagnetic valve 83 is provided in the middle of the refill water supply passage 90. Therefore, by opening the electromagnetic valve 83, the primary side flow path 20 and the secondary side flow path 30 are communicated with each other without passing between the main valve body 42 and the main valve seat surface 201, and the toilet SB is connected. Refill water can be supplied. As described above, the refill water supply flow path 90 communicates with the sub primary flow path 22 through the communication holes (226b, 228b) of the first cross-sectional area adjustment member 226 or the second cross-sectional area adjustment member 228. The flow path 20 and the secondary side flow path 30 are communicated. Therefore, the refill water supply channel 90 is a dedicated channel for supplying the refill water to the toilet SB. The channel cross-sectional area of the refill water supply channel 90 is set such that when the electromagnetic valve 83 is opened and the refill water is supplied to the toilet SB, the amount of water is such that no siphon phenomenon occurs.

  Further, since the refill water supply flow path 90 communicates with the sub-primary flow path 22 via the communication holes (226b, 228b) of the first cross-sectional area adjustment member 226 or the second cross-sectional area adjustment member 228, the main body portion There is no need to separately provide an opening for connecting the refill water replenishment flow path 90 to 10. Therefore, the refill water supply flow path can be easily formed, and the structure of the flow path opening / closing device can be simplified.

  The flash valve SV according to the embodiment of the present invention includes a power storage unit CD that stores power for driving the solenoid valve 82 and the solenoid valve 83. 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 from a power source AS, which is an AC power source, and a backup battery BT to a load LD (a general term for electrically driven parts such as the electromagnetic valve 82, the electromagnetic valve 83, and the control unit CU). Has been. 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 in the condenser CD is configured to be larger than the electric power consumed by the electromagnetic valve 82, the electromagnetic valve 83, and the control unit CU when the refill water supply operation is performed.

  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.

  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 first sub valve is opened and 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 view showing a state where the second sub valve is opened to supply refill water in the flush valve shown in FIG. 7A to 10B, (A) shows the movement of the flash valve SV, and (B) shows the corresponding instantaneous flow rate, the lift amount of the main valve 40, the sealing depth of the sealing portion SW, the electromagnetic valve 82 and the electromagnetic valve. The open / closed state of the valve 83 is shown.

  As shown in FIG. 7, the electromagnetic valve 82 and the electromagnetic valve 83 are 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 flow path 20, and the main valve 40 is closed due to the pressure difference between the back pressure chamber 14 and the secondary side flow path 30. ing. 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 main valve 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, the electromagnetic valve 82 is opened at time t <b> 1, and the water in the back pressure chamber 14 passes through the bypass flow path 80 to the secondary side flow path 30. The pressure drops. As a result, the main valve 40 is pushed up by the pressure difference between the primary pressure applied to the main valve 40 and the back pressure chamber 14, so that the main flow path is opened and supply of the main wash water to the toilet SB is started.

  At this time, when the first cross-sectional area adjusting member 226 is attached, the primary-side flow path 20 and the sub-back pressure chamber 12 are formed by the internal flow path 226a and the sub-primary flow path 22 of the first cross-sectional area adjusting member 226. Therefore, a pressure difference between the back pressure chamber 14 and the auxiliary back pressure chamber 12 occurs. Therefore, simultaneously with the rise of the main valve 40, the first position adjusting member 60 is also pushed down toward the back pressure chamber 14 due to the pressure difference between the back pressure chamber 14 and the auxiliary back pressure chamber 12. On the other hand, when the second cross-sectional area adjusting member 228 is attached, the secondary primary flow path 22 and the secondary back pressure chamber 12 are not in communication with each other, so that the pressure difference between the back pressure chamber 14 and the secondary back pressure chamber 12 is The first position adjusting member 60 does not move.

  Therefore, when the first cross-sectional area adjusting member 226 is attached, the first position adjusting member 60 is not pushed down much when the feed water pressure is low, and the first position adjusting member 60 is pushed down greatly when the feed water pressure is high. . Moreover, when the 2nd cross-sectional area adjustment member 228 is attached, the 1st position adjustment member 60 does not move irrespective of feed water pressure.

  Since the main valve 40 moves up until it abuts on the first position adjusting member 60, the first position adjusting member 60 adjusts the lift amount (maximum movable amount) of the main valve 40. Therefore, when the first position adjusting member 60 is pushed down relatively little, the lift amount of the main valve 40 increases. When the first position adjusting member 60 is not pushed down at all, the lift amount of the main valve 40 further increases. The amount of lift becomes smaller.

  Accordingly, the lift amount of the main valve 40 increases when the feed water pressure is low, and the lift amount of the main valve 40 decreases when the feed water pressure is high. Therefore, the difference in the instantaneous flow rate of the wash water supplied to the toilet SB side is reduced. Is suppressed. Moreover, the lift amount of the main valve 40 can be further increased by replacing the first cross-sectional area adjusting member 226 with the second cross-sectional area adjusting member 228. Therefore, by changing the first cross-sectional area adjusting member 226 to the second cross-sectional area adjusting member 228 according to the level of the supply water pressure, the difference in instantaneous flow rate due to the supply water pressure of the wash water supplied to the toilet SB side is further increased. Suppressed and substantially identical. Note that it is not necessary to keep the instantaneous flow rate of the wash water supplied to the toilet bowl SB exactly the same, and it is sufficient if an equivalent instantaneous flow rate within a certain range can be secured. Therefore, in the flow path opening / closing apparatus of the present embodiment, the constant flow means is configured by adjusting the movable amount of the main valve 40 by the first position adjusting member 60.

  In the state of FIG. 8, the main wash water continues to flow to the toilet SB side, and when a predetermined time t2 comes, the electromagnetic valve 82 is closed. Since the first sub valve 82 is closed, the water that has entered the back pressure chamber through the sub hole 463 and the communication path 464 can no longer pass from the bypass channel 80 to the secondary channel 30. The back pressure in the back pressure chamber 14 is restored. As shown in FIG. 9, the main valve 40 starts to descend due to the back pressure in the back pressure chamber 14, and 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. In addition, since the back pressure of the back pressure chamber 14 is restored, the main valve 40 is pushed down, and the first position adjusting member 60 also eliminates the pressure difference between the sub back pressure chamber 12 and the back pressure chamber 14. It is pushed up to the initial position by the spring 70 and moves toward the initial position.

  Washing water is supplied to the toilet SB from time t2 to time t3 from when the first sub valve 82 is closed until the main valve 40 closes the main flow path. At the time t3, the supply of the washing water is finished, and the siphon of the toilet 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, the refill water supply operation is performed by opening the electromagnetic valve 83 from time t4 to time t5 as shown in FIG. Execute. In the refill water supply operation, the wash water supplied from the primary side flow path 20 passes through the sub primary flow path 22, the first cross-sectional area adjusting member 226, and the refill water supply flow path 90, and is supplied to the toilet SB as refill water. The

  Even if the electromagnetic valve 83 is opened, the back pressure in the back pressure chamber 14 does not decrease, so the main valve 40 does not rise. Therefore, the main flow path is not opened during the refill water supply operation. In addition, after a predetermined time (from time t2 to time t4) has passed since the electromagnetic valve 82 is closed and the siphon is finished, the electromagnetic valve 83 is opened and the refill water supply operation is executed, so that the refill supplied to the toilet SB is performed. It is possible to prevent water from being drained by a siphon phenomenon caused by the main cleaning.

  At this time, when the first cross-sectional area adjusting member 226 is attached to the opening 222, the auxiliary back pressure chamber 12 and the auxiliary primary flow path 22 are communicated with each other by the internal flow path 226a. Therefore, when the electromagnetic valve 83 is opened, the back pressure applied to the auxiliary back pressure chamber 12 is released to the secondary side flow path 30 through the refill water supply flow path 90. Therefore, the first position adjusting member 60 can be returned to the initial position in a short time, and the time until the cleaning water can be supplied next can be shortened.

  The channel cross-sectional area of the refill water supply channel 90 is set such that when the electromagnetic valve 83 is opened and the refill water is supplied to the toilet SB, the amount of water is such that no siphon phenomenon occurs. Therefore, since the instantaneous flow rate of the cleaning water supplied to the toilet SB when the electromagnetic valve 83 is opened is small, even if the primary pressure fluctuates, the instantaneous flow rate during the refill water supply operation is not easily affected. Therefore, the refill water supply amount can be adjusted with high accuracy by controlling the time (time t4 to time t5) during which the refill water supply operation is executed. Therefore, it is possible to reliably supply the amount of refill water necessary for sealing water to the toilet SB without generating siphon during the refill water supply operation.

  As described above, in the flush valve SV of the present embodiment, the main valve is opened by lowering the back pressure in the back pressure chamber 14 by opening the electromagnetic valve 82, and the main valve that closes the electromagnetic valve 82 is supplied after supplying the main cleaning water. The sub-primary flow path 22 and the refill water supply flow path are opened without opening the main valve by opening the electromagnetic valve 83 after a predetermined time (from time t2 to time t4) has elapsed since the cleaning operation was performed and the electromagnetic valve 82 was closed. A refill water supply operation for supplying the refill water through the primary side flow path 20 and the secondary side flow path 30 through 90 is performed (see FIGS. 7 to 10).

  According to the present embodiment, the refill water supply flow path 90 is a dedicated flow path for supplying refill water, so that the primary side flow path 20 and the main valve body 42 and the main valve seat 201 are not interposed. The refill water can be supplied by communicating with the secondary channel 30. In addition, by setting the flow rate of the refill water supply passage 90 so that siphon is not generated during the refill water supply operation, it is possible to reliably supply the amount of refill water necessary for sealing water.

  In addition, the refill water supply channel 90 of the present embodiment is branched from the sub-primary channel 22 and allows the primary channel 20 and the secondary channel 30 to communicate with each other.

  In this way, when the second auxiliary valve is opened, water escapes from the auxiliary back pressure chamber to the secondary flow path side, and the back pressure applied to the position adjusting member can be released. Therefore, the position adjustment member can be returned to the initial position in a short time by closing the first sub valve and opening the second sub valve after the supply of the cleaning water is stopped. The time until it can be supplied can be shortened.

  In this embodiment, the refill water supply channel 90 communicates with the primary side channel 20 and the secondary side channel 30 by communicating with the sub primary channel 22 and the communication hole through the inside of the channel adjustment mechanism. ing.

  In this way, the refill water supply channel 90 can be easily formed without separately providing an opening for the refill water supply channel 90 in the channel switch, and the structure of the channel switch It can be simplified.

  Further, in the flow path opening and closing device of the present embodiment, the refill water supply operation required when attached to the siphon type toilet is executed, but it is possible to set whether or not to execute this refill water supply operation. May be. By doing in this way, when it attaches to the toilet bowl which is not a siphon system, since execution of refill water supply operation | movement can be stopped, it can be set as the flow-path opening-and-closing apparatus corresponding to the toilet bowl of various systems.

  In the above-described embodiment, an example in which the control unit CU that controls the first sub valve 82 and the second sub valve 83 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 first sub valve 82 and the second sub valve 83 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 first sub valve 82 and the second sub valve 83 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. Therefore, the configuration of the entire toilet device can be simplified.

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 flow path 201: Main valve seat surface (main valve seat)
21: Inlet 22: Sub-primary flow path 222: Opening 226: First cross-sectional area adjustment member 226a: Internal flow path 226b: Communication hole 226c: Side opening 226d: End opening 228: Second cross-sectional area adjustment member 228a: Internal flow path 228b: Communication hole 228c: Side opening 30: Secondary flow path 31: Outlet 40: Main valve 42: Main valve body 421: Main valve body surface 44: Constant flow valve body 441: Outer surface 442: Slit 46 : Receiving 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 passage 82: Solenoid valve (first sub valve)
83: Solenoid valve (second auxiliary valve)
90: Refill water supply passage Wa: Inflow water Wb: Outflow water CD: Condenser LD: Load AS: Power supply BT: Backup battery REa: Diode REb: Diode

Claims (3)

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 without passing between the main valve body and the main valve seat;
A first subvalve for opening and closing the bypass channel;
A refill water replenishment flow path connecting the primary flow path and the secondary flow path;
A second sub-valve for opening and closing the refill water replenishment flow path;
A controller for controlling opening and closing of the first sub valve and the second sub valve;
By opening the first sub valve, the back pressure of the back pressure chamber is lowered to open the main valve, and after supplying main cleaning water, the first sub valve is closed to increase the back pressure of the back pressure chamber. Refill water for supplying refill water through the refill water supply channel by opening the second sub valve after a lapse of a predetermined time after the first sub valve is closed. A flow path opening and closing device that performs a supply operation. The constant flow means is configured by adjusting a movable amount of the main valve body by a position adjusting member that moves along a sliding direction of the main valve body,
It is provided on the opposite side of the back pressure chamber with the position adjustment member interposed therebetween, and water flows from the primary side flow path so that back pressure is applied so as to bring the position adjustment member closer to the main valve body. Back pressure chamber,
A primary primary channel that communicates the primary channel and the secondary back pressure chamber;
The flow path opening and closing device according to claim 1, wherein the refill water supply flow path branches from the sub primary flow path, and connects the primary flow path and the secondary flow path. A flow path adjustment mechanism attached to the sub primary flow path and capable of adjusting a cross-sectional area of the sub primary flow path;
The flow path adjustment mechanism has a communication hole that communicates the sub primary flow path and the outside of the sub primary flow path,
The refill water supply channel communicates said auxiliary primary flow path and the communicating hole and said the previous SL primary flow channel by communicating with the secondary-side flow path through the interior of the flow path adjustment mechanism of claim 3. The flow path opening / closing device according to 2.

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