JP4215114B2 - Washing water discharge device and flush toilet equipped with the same - Google Patents

Description

  The present invention relates to a washing water discharge device that discharges a medicine mixed washing water obtained by mixing a liquid medicine in washing water from a discharge port, and a flush toilet equipped with the same. The present invention relates to a technique for trying to enable a stable supply of drug-mixed washing water while eliminating the loss.

  Conventionally, at the rear of the toilet body, a chemical tank that communicates with the rim water supply cleaning water channel and discharges the chemical along with the rim water supply is installed, and the cleaning water channel is opened and closed by the rim water supply opening / closing valve and the cleaning water flow from the chemical tank. A flush toilet device that performs various cleaning processes such as pre-cleaning of the bowl part by rim water supply, discharging of sewage by jet water supply, and sealing of the bowl part by rim water supply by opening and closing the path leading to the path with a chemical discharge valve It is known (see, for example, Patent Document 1).

  However, in the conventional example shown in Patent Document 1, the medicine in the medicine tank is sucked from the medicine tank by the negative pressure in the washing water flow path and added to the washing water. Is placed far away from the washing water flow path, the path from the drug tank to the washing water flow path becomes longer, the drug remains in the path, the remaining drug is hardened due to viscosity, and the path is likely to be clogged. As a result, there is a problem that it becomes impossible to discharge cleaning water at the time of subsequent toilet cleaning, and maintenance is required. For this reason, conventionally, the path of the medicine tank must be shortened and the medicine tank must be installed at a position close to the washing water flow path, which limits the place where the medicine tank is installed.

  As another conventional example, there is known an automatic supply device for cleaning liquid for a urinal in which a liquid drug flowing from a drug dissolution tank in which a solid drug is immersed in water is supplied to a cleaning drain pipe through a bypass pipe (for example, a patent) Reference 2).

However, in the conventional example shown in Patent Document 2, there is a problem that the drug remaining in the bypass pipe is hardened and clogged easily in the bypass pipe, and cannot be supplied to the cleaning drain pipe. For this reason, there was a restriction that the chemical tank had to be installed at a high place.
JP-A-5-214757 JP 2002-256284 A

  The present invention has been invented in view of the above-described conventional problems, and even when the drug tank is installed at a position away from the wash water flow path, the drug is clogged in the path from the drug tank to the wash water flow path. A washing water discharge device that can stably supply a small amount of liquid medicine into the washing water without requiring restrictions on the place where the medicine tank is installed, and a flush toilet equipped with the washing water discharge device It is a problem to provide.

In order to solve the above-mentioned problem, the cleaning water discharge device according to the present invention is a cleaning water discharge device that discharges from the discharge port 2 a chemical mixed cleaning water in which a liquid chemical is mixed in the cleaning water flowing through the cleaning water flow path 3. A medicine tank 8 that stores liquid medicine, a circulation path 5 that is connected to the medicine tank 8 at both ends, a circulation pump 7 that circulates the liquid medicine in the circulation path 5 into the circulation path 5, and a branch from the circulation path 5. Te and a branch path 6 communicating with the washing water channel 3, provided drug supply means for supplying to the circulation path 5 of the liquid drug circulating in through the branch path 6 wash water channel 3 Rutotomoni, From the upstream side, a nozzle tube 21 having a tapered shape in which the cross-sectional area of the channel gradually decreases toward the tip of the washing water channel 3 and a horizontal tubular ejector tube 22 into which the tip of the nozzle tube 21 is inserted. This order toward the downstream The ejector pipe 22 has an upstream large-diameter portion 23 that has a large cross-sectional area in the upstream and gradually decreases the cross-sectional area in the downstream, a small-diameter portion 24 that narrows the path diameter, and a small-diameter portion 24. The downstream large-diameter portion 25 that gradually increases the cross-sectional area of the flow path as it goes downstream is formed in this order from the upstream toward the downstream, and the air mixing portion 23a is provided in the flow path portion of the upstream large-diameter portion 23, It is characterized in that a drug mixing part 24 a into which a liquid drug is mixed from the branch path 6 is provided in the flow path part of the small diameter part 24 .

With such a configuration, even when the medicine tank 8 is installed at a position away from the washing water flow path 3, the liquid medicine is circulated in the circulation path 5 and the liquid medicine is passed through the branch path 6 to the washing water flow path. 3 can prevent clogging of the medicine in the path from the medicine tank 8 to the washing water flow path 3, and thus a small amount of liquid medicine from the medicine tank 8 can be stably supplied into the washing water. It becomes.
In addition, air is sucked and mixed in the washing water flowing from the tip of the nozzle tube 21 into the ejector tube 22 from the air mixing portion 23 a provided in the upstream large diameter portion 23, and the liquid medicine from the branch path 6 is provided in the small diameter portion 24. Then, it is mixed into the washing water from the medicine mixing section 24a. At this time, the air mixed in the washing water has a higher flow rate and expands by being reduced in pressure when passing through the region from the small diameter portion 24 of the ejector pipe 22 to the downstream large diameter portion 25, and further, the downstream large diameter portion. In FIG. 3, the flow is divided by the shearing force generated when the washing water flow passage 3 is pressurized and contracted as the flow passage sectional area increases. That is, bubbles are further miniaturized by external forces such as shear force and shock wave acting on the downstream large diameter portion 25 of the ejector tube 22. This makes it difficult for the bubbles to stick to each other due to the medicine, so that the medicine mixed washing water in which the microbubbles and the liquid medicine are mixed is generated.

  In addition, the circulation pump 7 also serves as a medicine supply means, and includes a pump control means for adjusting the output of the circulation pump 7 and controlling the supply amount of the liquid medicine delivered to the washing water flow path 3. In this case, it is possible to control the supply amount of the liquid medicine sent to the washing water flow path 3 by adjusting the output of the circulation pump 7, and it is easy to adjust a minute amount of the liquid medicine.

  The medicine tank 8 is detachable from the circulation path 5, and after the removed medicine tank 8 is attached again, the circulation pump 7 is automatically driven to fill and fill the circulation path 5 with the liquid medicine. It is preferable to have an initial setting mode in which the circulation pump 7 is automatically stopped later so that the medicine mixed washing water can be discharged in a standby state. In this case, the user can connect the medicine tank from the circulation path 5 to the medicine tank. After removing 8 and replenishing the liquid medicine, the initial setting mode is executed when the medicine tank 8 is attached again, and the circulation pump 7 is automatically driven to circulate the liquid medicine in the circulation path 5 to circulate. The path 5 is filled with the liquid medicine, and the circulation pump 7 is automatically stopped after a predetermined time. As a result, it is possible to return to a standby state in which a quick start-up operation of medicine supply is possible.

  In addition, it is preferable that the flow passage cross-sectional area of the washing water flow passage 3 portion where the liquid medicine is mixed from the branch passage 6 is a small diameter portion 24 narrowed down than the flow passage cross-sectional area of the other flow passage portions. Since the negative pressure generated by the washing water in the small diameter portion 24 becomes large, the liquid medicine can be sucked into the washing water flow path 3 from the branch path 6 by using this large negative pressure. In other words, since the liquid medicine can be stably supplied into the washing water passage 3 by the output of the circulation pump 7 and the negative pressure in the washing water passage 3, the operation cost can be saved by reducing the output of the circulation pump 7. The circulation pump 7 can be downsized.

  In the flush toilet equipped with the washing water discharge device of the present invention, the washing water discharge device 1 is installed outside the bowl portion 11 in the toilet body 10, and the discharge port 2 of the washing water discharge device 1 is the bowl portion. 11 is characterized by being arranged facing the inner surface.

  By adopting such a configuration, in addition to high cleaning ability, the place where the chemical tank 8 is not restricted and the cleaning water discharge device 1 that can always stably supply the liquid chemical is not visible from the outside. It can be installed when it is not exposed to water.

  In the present invention, the liquid medicine is circulated in the circulation path by the circulation pump, and the medicine tank is installed at a position away from the washing water flow path by supplying the liquid medicine into the washing water flow path through the branch path by the medicine supply means. Even in this case, the medicine is not clogged in the path from the medicine tank to the washing water flow path, and as a result, the washing that can stably supply a small amount of liquid medicine into the washing water without being restricted by the place where the medicine tank is installed. A water discharge device can be formed.

  Moreover, the present invention can provide a flush toilet equipped with a washing water discharge device that is not restricted by the place where the medicine tank is installed and that does not require maintenance due to clogging with a liquid medicine, in addition to high washing ability.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  FIG. 1 is an example of a flush toilet equipped with a flush water discharge device 1 of the present invention, and a main body is composed of a toilet bowl body 10 made of synthetic resin.

  A drain tube portion 12 protrudes from the lower portion of the bowl portion 11 of the toilet body 10 toward the rear, and water stored in the bowl portion 11 can be drained from the drain tube portion 12 via a trap. ing. The trap of this example is of a turn trap type and is constituted by a flexible trap cylinder 9 connected to the drain cylinder section 12, and the trap cylinder is formed by rotating the arm member 15 by a turn trap motor 31 (FIG. 8). 9 can be selected between a trap structure state in which the shape is upward U-shaped (solid line state in FIG. 10) and a state in which the trap structure is released in a downward inverted L-shape (virtual line state in FIG. 10). Usually, the trap cylinder 9 has a trap structure with an upward U shape, and water is accumulated in the lower part of the bowl part 11, the drain cylinder part 12, and the trap cylinder 9. In this state, stool or urine is performed, and when the stool or urine is finished, the bubble mixed cleaning water is made to flow from the discharge port 2 of the cleaning water discharge device 1 as described later, and the trap cylinder 9 is rotated to trap structure. Release That the state of the virtual line in FIG. 10, so as to drain the sewage with dirt.

  2 and 3 are explanatory views of the appearance of the cleaning water discharge device 1, and FIG. 4 is a sectional view. As shown in FIG. 1, the washing water discharge device 1 is housed in a device storage section 14 provided at the rear part of the toilet body 10, and includes washing water supply means for supplying washing water into the washing water flow path 3, washing water Air mixing means for sucking and mixing air into water, drug supply means for supplying a liquid drug to the cleaning water, and a discharge port 2 for discharging either the bubble mixed cleaning water or the drug mixed cleaning water are provided. Either the bubble mixed cleaning water in which bubbles are mixed into the cleaning water or the medicine mixed cleaning water obtained by mixing the liquid drug in the bubble mixed cleaning water is selectively discharged from the discharge port 2 to the inner surface of the bowl 11. Thus, the inner surface of the bowl portion 11 is cleaned.

  The washing water supply means is constituted by a water supply control valve 16 (FIG. 1) comprising an electromagnetic valve provided upstream of the washing water flow path 3 directly connected to the water pipe, for example, and this water supply control valve 16 is used for washing the bowl portion 11. It is controlled to open during water discharge operation. As a means for supplying cleaning water to the cleaning water flow path 3, tap water pressure is used. At the downstream end of the washing water flow path 3, a discharge port 2 that is disposed behind the upper end portion of the bowl portion 11 and faces the bowl portion 11 is provided.

  Here, as shown in FIG. 4, the downstream side of the cleaning water flow path 3 includes a nozzle tube 21 formed in a tapered shape that gradually decreases the cross-sectional area of the flow path toward the tip, and a tip portion of the nozzle pipe 21. The horizontal tubular ejector tube 22 and the discharge port 2 are inserted. The ejector pipe 22 has an upstream large-diameter portion 23 that has a large channel cross-sectional area upstream (left side in FIG. 4) and gradually decreases the channel cross-sectional area toward the downstream (right side in FIG. 4), and a narrow path diameter. The small-diameter portion 24 and the downstream large-diameter portion 25 that gradually increases the cross-sectional area of the flow path toward the downstream of the small-diameter portion 24 (right side in FIG. 4) are formed in this order from upstream to downstream. The flow path portion of the upstream large diameter portion 23 is an air mixing portion 23a, the flow path portion of the small diameter portion 24 is a drug mixing portion 24a, and the flow path portion extends from the small diameter portion 24 to the downstream large diameter portion 25. Is the bubble generating part 25a. The bubble generating unit 25a shears and miniaturizes bubbles contained in the cleaning water by changing the pressure by pressurizing and depressurizing the bubble mixed cleaning water flowing from the upstream. On the downstream side of the ejector tube 22, a flow straightening plate 50 made of a mesh that shears bubbles is provided as bubble subdividing means for further subdividing the bubbles.

  The air mixing means is for supplying air from the outside to the air mixing portion 23a (upstream large diameter portion 23 of the ejector pipe 22) of the washing water flow path 3. One end is opened to the outside air and the other end is mixed with air. The intake valve 17 (FIG. 1) is provided in the middle of the air supply path 26 (FIG. 2) opened in the portion 23a, and the air is generated by the cleaning water flowing into the ejector pipe 22 from the tip of the nozzle pipe 21. A negative pressure is generated in the mixing portion 23a, and the intake valve 17 is opened by the ejector effect, and air from the outside is sucked into the cleaning water through the air supply path 26, and air bubbles are mixed into the cleaning water. Mixed wash water is produced. In the example of FIG. 4, the aeration unit 23 a is formed to have a larger diameter than the tip of the nozzle tube 21, so that the aeration unit 23 a is more negative due to the flow of cleaning water near the tip of the nozzle tube 21. It is a pressure generator.

  The washing water discharge device 1 includes a medicine tank 8 for storing a liquid medicine, a circulation path 5 having both ends connected to the medicine tank 8, a circulation pump 7 for circulating the liquid medicine in the circulation path 5, and a circulation path 5. A branch path 6 that branches and communicates with the cleaning water flow path 3 is provided.

  As shown in FIG. 1, the medicine tank 8 is stored in a lower space 14 b below the partition 13 of the device storage 14, and other components (circulation pump 7, branch path) of the cleaning water discharge device 1. 6, the water supply control valve 16, the washing water flow path 3, etc.) are accommodated in the upper space 14 a above.

  The circulation path 5 is arranged across the upper space 14a and the lower space 14b. Both ends 5a and 5b of the circulation path 5 extend to the lower space 14b, and two tank insertion pipes 27a and 27b respectively connected to the both ends are inserted into the medicine tank 8, and each tank insertion pipe 27a 27b reaches the tank bottom wall. For example, as shown in FIG. 11, the two tank insertion pipes 27a and 27b and the both ends 5a and 5b of the circulation path 5 are detachable via a connection member 28 fitted into the connection port on the upper end surface of the medicine tank 8. When the medicine tank 8 is connected and the liquid medicine is replenished, the medicine tank 8 can be detached from both ends 5a and 5b of the circulation path 5 by removing both ends 5a and 5b of the circulation path 5 from the connection member 28, for example. Thus, by removing a cover (not shown) provided on the outer surface of the toilet body 10, the medicine tank 8 can be taken out of the toilet body 10, and a liquid medicine can be introduced from the medicine inlet 30 with the cap 29. It has become. In addition, as liquid chemical | medical agents, aqueous solutions, such as detergent containing a surfactant or an aromatic, are mentioned, for example.

  As shown in FIG. 1, a circulation pump 7 is interposed in the middle of the portion arranged in the upper space 14 a of the circulation path 5. The circulation pump 7 circulates the liquid medicine in the circulation path 5 by sucking out the liquid medicine in the medicine tank 8 from one of the tank insertion pipes 27 a and 27 b into the circulation path 5 and returning it to the medicine tank 8 from the other. To work.

  Furthermore, one end of a branch path 6 branched from the middle of the circulation path 5 is branched to the discharge side of the circulation pump 7. One end of the branch path 6 is configured by a small-diameter hole, and the other end of the branch path 6 is disposed so as to face the medicine mixing part 24a (the small-diameter part 24 of the ejector tube 22) of the washing water flow path 3. A small amount of the liquid medicine circulating through the circulation path 5 is supplied to the washing water flow path 3 through the branch path 6 by the circulation pump 7. An opening / closing valve 18 (FIG. 8) made up of, for example, an electromagnetic valve is provided at the tip of the branch path 6, and by opening the opening / closing valve 18, the liquid medicine can be supplied into the washing water flow path 3 and closed. Thus, the liquid medicine can be prevented from leaking into the washing water flow path 3.

  The circulation pump 7 of this example supplies the liquid medicine in the circulation path 5 to the wash water flow path 3 through the branch path 6 in addition to the function of circulating the liquid medicine stored in the medicine tank 8 to the circulation path 5. It also functions as a medicine supply means for doing this. That is, the circulation pump 7 also serves as a medicine supply means, and the output of the circulation pump 7 is controlled by the control unit 20 (FIG. 8) which is a pump control means, and the washing water flow path 3 is adjusted by adjusting the output of the circulation pump 7. It is possible to adjust the supply amount of the liquid medicine to be sent out.

  The control unit 20 shown in FIG. 8 includes a microcomputer that controls the circulation pump 7, the water supply control valve 16, the turn trap motor 31, and the branch path opening / closing valve 18. For example, when a toilet cleaning command is transmitted to the control unit 20 by operating the cleaning switch 32 or the like, the control unit 20 executes a cleaning water discharge mode and a medicine mixed cleaning water discharge mode described later to The cleaning is performed, and after the liquid medicine is replenished in the medicine tank 8, an initial setting mode to be described later is executed to return to a state where the medicine mixed washing water discharge mode can be quickly started.

  Next, the washing operation of the flush toilet will be described with reference to FIG.

  When the user turns on the cleaning switch 32 (FIG. 8) and issues a toilet cleaning start command, the control unit 20 executes the cleaning water discharge mode. In the first half of the cleaning water discharge mode, only the bubble mixed cleaning water is discharged, and in the latter half of the operation in the cleaning water discharge mode for a predetermined time, the medicine mixed cleaning water discharge mode is started to mix the fine bubbles and the liquid drug. Discharge mixed washing water. This will be specifically described below.

  Prior to the start of cleaning, the on-off valve 18 is closed, the communication between the circulation path 5 and the cleaning water flow path 3 is shut off, and the circulation pump 7 is held in a stopped standby state. When the washing switch 32 is pressed, the washing water discharge mode is executed, the water supply control valve 16 is opened for a certain time (t1 → t6 in FIG. 9), and the washing water is supplied from the water pipe to the washing water channel 3. At this time, due to the ejector effect of the cleaning water flowing through the air mixing portion 23a (upstream large diameter portion 23 of the ejector pipe 22) of the cleaning water flow path 3, the intake valve 17 is opened and air is sucked into the cleaning water from the outside. Here, the air mixed in the cleaning water is reduced in pressure while being increased in flow velocity when passing through the bubble generating portion 25a (the region from the small diameter portion 24 of the ejector pipe 22 to the downstream large diameter portion 25) of the cleaning water flow path 3. Inflated and further compressed and contracted as the channel cross-sectional area of the cleaning water channel 3 increases in the large-diameter portion on the downstream side, but is divided by the shearing force generated at this time, for example, bubbles of 3 to 5 mm are generated in the cleaning water. And discharged from the discharge port 2 as bubble mixed cleaning water. The bubble-mixed cleaning water is discharged almost horizontally onto the upper inner surface of the bowl portion 11 to wash away dirt while circulating around the inner surface. At this time, bubbles contained in the washing water are as large as mm order, and the inner surface of the bowl portion 11 can be efficiently washed by the high washing power of the bubble mixed washing water itself due to the induction of high-frequency vibration generated when it collides with the inner surface of the bowl portion 11. That is, as a result of being able to explode the inner surface of the bowl portion 11 more efficiently, air bubbles in the order of mm are more easily ruptured. As a result, the flushing effect is improved and the function of discharging the sewage of the flush toilet is enhanced.

  Thereafter, the turn trap motor is driven at time t2 in FIG. 9 to discharge the sewage by rotating the turn trap from the upper position to the lower position, and the turn trap motor is driven again at time t3 in FIG. The trap is returned to the upper position, and the state in which cleaning water is stored in the bowl portion 11 is maintained thereafter.

  At this stage, the medicine mixed cleaning water discharge mode is executed. At the time t4 in FIG. 9, the on-off valve 18 is opened and the circulation pump 7 is driven simultaneously to circulate the liquid medicine in the circulation path 5. At this time, the liquid medicine that circulates in the circulation path 5 is circulated by the pressure of the circulation pump 7 and the negative pressure generated by the washing water passing through the medicine mixing part 24a (the small diameter part 24 of the ejector pipe 22) of the washing water flow path 3. The liquid is sucked into the medicine mixing portion 24a of the washing water flow path 3 through the branch path 6 branched from 5, and mixed into the washing water. When a surfactant is used as the liquid medicine, when the surfactant is mixed in the cleaning water, the surface tension of the water decreases, and the bubble generating portion 25a of the cleaning water flow path 3 (the downstream large diameter portion 25 of the ejector pipe 22). When the external force such as shearing force or shock wave acts on the bubbles, the bubbles are further miniaturized. That is, since it becomes difficult for the air bubbles to stick to each other due to the medicine, the medicine mixed cleaning water containing fine bubbles of 50 to 60 μm is generated, and this medicine mixed cleaning water is discharged from the discharge port 2 and the bowl portion 11. It is stored as water storage inside. In this way, by reducing the diameter of the bubbles contained in the drug mixed cleaning water discharged from the discharge port 2 in the drug mixed cleaning water discharge mode, the interface between the inner surface of the bowl portion 11 and the draft line in contact with the water surface of the stored water It is possible to adhere micro-order micro bubbles with a high antifouling effect that form an interface with a chemical mixed washing water containing an active agent, and the micro bubbles are difficult to burst and stay in the bowl portion 11 for a long time. Thus, the inner surface of the bowl portion 11 can be adhered to the inner surface of the bowl portion 11, and the inner surface of the bowl portion 11, particularly the water line portion, can be cleaned.

  Thereafter, at time t5 in FIG. 9, the medicine mixed cleaning water discharge mode ends, the circulation pump 7 stops and the on-off valve 18 closes, whereby the medicine supply into the cleaning water flow path 3 stops. Thereafter, at time t6 in FIG. 9, the cleaning water discharge mode ends, the water supply control valve 16 is closed, and the supply of cleaning water is stopped.

  Even when the medicine tank 8 is located away from the washing water flow path 3, in this example, in the lower space 14 b of the equipment storage section 14 behind the toilet body 10, the circulation medicine 7 supplies the liquid medicine. By circulating in the circulation path 5, it is possible to prevent clogging of the drug in the path 4 (circulation path 5, branch path 6) from the drug tank 8 to the washing water flow path 3. In addition, since the circulation path 5 can be extended to a position immediately above the wash water flow path 3, the length of the branch path 6 that connects the circulation path 5 and the wash water flow path 3 up and down can be shortened. It is also effective in preventing clogging due to residual residues. In addition, in this example, the medicine mixed cleaning water discharge mode ends at a time earlier than the end of the cleaning water discharge mode. That is, since the water supply control valve 16 is opened for a predetermined time after the supply of the liquid medicine is stopped (between times t5 and t6 in FIG. 9), the liquid medicine does not remain in the washing water flow path 3. It is possible to prevent clogging of the medicine in the path 3. As a result, a small amount of liquid medicine can be constantly and stably supplied into the washing water flow path 3 at the same time as driving of the circulation pump 7 is started and the air bubbles are mixed while eliminating the restriction of the place where the medicine tank 8 for storing the liquid medicine is placed. The cleaning water or the chemical mixed cleaning water can be always discharged stably from the discharge port 2.

  In addition, the circulation pump 7 of the present example circulates the liquid medicine stored in the medicine tank 8 in the circulation path 5 and the liquid medicine in the circulation path 5 through the branch path 6 in the medicine mixing portion 24a of the washing water passage 3. Therefore, the circulation pump 7 also serves as a medicine supply means, and it is not necessary to separately provide the medicine supply means. In addition, the supply of the liquid medicine to be sent to the washing water flow path 3 by adjusting the output of the circulation pump 7 Since the amount can be controlled, a minute adjustment of the liquid medicine becomes easy.

  In addition, since a large number of millimeter-sized bubbles are mixed in the bubble mixed washing water discharged to the bowl part 11, a good washing effect can be obtained as compared with the case of using only water, and the amount of water used is small. In addition, a high water-saving effect can be obtained, and in addition, a large amount of micro-bubbles and drugs are dispersed and mixed in the drug-mixed wash water, so that the drug is uniformly dispersed in the wash water. A more stable cleaning effect can be obtained. In addition, since the opening / closing valve 18 is provided at the tip of the branch path 6, the liquid medicine leaks into the cleaning water flow path 3 even after the negative pressure in the cleaning water flow path 3 is applied after the driving of the circulation pump 7 is stopped. Since it can be prevented by closing the on-off valve 18, wasteful consumption of the liquid medicine can also be suppressed.

  In this example, as shown in FIG. 11, the medicine tank 8 is detachable from both ends 5a and 5b of the circulation path 5, and when the medicine is replenished, the user removes the medicine tank 8 from the circulation path 5. When the removed medicine tank 8 is removed and replenished, and then the removed medicine tank 8 is attached again, for example, a tank detection sensor 33 (FIG. 8) comprising a limit switch detects the medicine tank 8 and sends a detection signal to the control unit 20. To send. When the detection signal is sent, the control unit 20 executes the initial setting mode and automatically drives the circulation pump 7 to circulate the liquid medicine in the circulation path 5 so that the liquid medicine is filled in the circulation path 5. The circulating pump 7 is automatically stopped after a predetermined time. Thereby, it is possible to return to the standby state in which the quick start-up operation of the medicine mixed cleaning water discharge mode is possible.

  In the above-described embodiment, the case where the circulation pump 7 also serves as a medicine supply unit by adjusting the output of the circulation pump 7 has been described. However, as another embodiment of the present invention, the output of the circulation pump 7 is lowered to perform cleaning. It is also possible to supply the medicine by using a negative pressure generated by the wash water flowing in the water flow path 3. In the example shown in FIG. 4, the medicine mixing portion 24 a in the washing water flow path 3 is configured by the narrowest diameter portion 24 of the ejector pipe 22, so that negative pressure generated by the washing water flowing through the medicine mixing portion 24 a is generated. The liquid drug can be sucked into the washing water channel 3 by using this large negative pressure. That is, even if the output of the circulation pump 7 is not a high output for sending the liquid medicine from the branch path 6 into the washing water flow path 3, the liquid medicine circulating in the circulation path 5 is negative pressure generated in the washing water flow path 3. It is sucked into the washing water flow path 3 only by the ejector effect due to the above. Therefore, in this case, the liquid medicine can be stably supplied into the wash water flow path 3 by the output of the circulation pump 7 and the negative pressure in the wash water flow path 3, and the operation cost can be saved by reducing the output of the circulation pump 7. At the same time, the circulation pump 7 can be reduced in size, and consequently the toilet body 10 incorporating the circulation pump 7 can be reduced in size.

  Further, in the flush toilet of this example, the flush water discharge device 1 having the above-described configuration is incorporated in the equipment storage portion 14 provided at the rear of the bowl portion 11 of the toilet body 10, and is located in a place where it cannot be seen from the outside. The wash water discharge device 1 can be stored when it is not covered, and the appearance fits well, and even when a special power source for driving the circulation pump 7 is required, It is possible to avoid a leakage accident due to water wetting in the room and high humidity, which is preferable in practical use.

  In the above-described embodiment, the case where an electromagnetic valve is used as the opening / closing valve 18 of the branch path 6 has been described. However, as another example, an opening / closing valve 19 formed of a member such as elastically deformable rubber can be used. . An example is shown in FIGS. In this example, as shown in FIG. 7, a cylindrical portion 40 constituting the branch path 6 is integrally projected upward from the small diameter portion 24 of the ejector tube 22 constituting the medicine mixing portion 24 a of the washing water flow path 3. A slit-like communication hole 41 communicating with the inside of the small diameter portion 24 is formed at the lower end of the cylindrical portion 40. The upper end of the cylindrical portion 40 communicates with the circulation path 5.

  An opening / closing valve 19 formed of a member such as rubber that can be elastically deformed is disposed inside the lower portion of the cylindrical portion 40. As shown in FIG. 7 (a), the on-off valve 19 has a bottomed cylindrical tubular portion 19a that is open at one end (upper end), and from the bottom of the tubular portion 19a in a direction opposite to the tubular portion 19a (downward). The outer peripheral surface of the cylindrical part 19a and the inner peripheral surface of the cylindrical part 40 are sealed tightly in close contact with each other.

  The on-off valve 19 is formed with a slit-shaped hole 19c that allows communication between the inside of the tubular portion 19a and the distal end surface (lower end surface) of the valve portion 19b. The slit-shaped hole 19c is formed in the axial direction of the tubular portion 19a (cleaning liquid). It is formed in the shape of a slit as viewed from the direction of the flow. The slit-shaped hole 19c is formed in the central portion of the valve portion 19b in the thickness direction, and maintains its own shape with the slit-shaped hole 19c closed when no external force is applied (the state shown in FIG. 7A). To do.

  The distal end portion of the flaky valve portion 19b of the on-off valve 19 is inserted into the communication hole 41 formed in the small diameter portion 24 of the ejector tube 22, and the distal end side of the valve portion 19b of the slit-shaped hole 19c of the on-off valve 19 is inserted. The opening faces the inside of the small diameter portion 24 (that is, inside the medicine mixing portion 24a of the washing water flow path 3). In addition, a through hole 42 (FIG. 5) that communicates the space formed outside the valve portion 19b of the on-off valve 19 in the cylindrical portion 40 to the outside is provided in a portion of the cylindrical portion 40 that faces the valve portion 19b. Thus, in the state of FIG. 7A in which the on-off valve 19 closes the slit-shaped hole 19c, the medicine mixing portion 24a of the washing water flow path 3 is connected to the tip of the valve portion 19b of the on-off valve 19 and the inner periphery of the communication hole 41. The gap 43, the space 44, and the through hole 42 formed between the surface and the through hole 42 are communicated to the outside in this order. An open air path is formed.

  In the medicine mixed washing water discharge mode, the on-off valve 19 is operated by the pressure of the circulation pump 7 and the medicine mixing part 24a (the small diameter part 24 of the ejector pipe 22) of the washing water flow path 3 as shown in FIG. The valve portion 19b is elastically deformed so as to open the slit-shaped hole 19c due to the generated negative pressure, whereby the branch path 6 and the washing water flow path 3 communicate with each other and the liquid medicine in the circulation path 5 is allowed to flow. The water is supplied into the washing water flow path 3 through the branch path 6 and the on-off valve 19. At this time, the outer peripheral surface of the tip of the elastically deformed valve portion 19b is set in contact with the inner peripheral surface of the communication hole 41 so as to close the gap 43 (FIG. 7 (a)) constituting the atmosphere opening path. The open / close valve 19 shuts off the atmosphere open path and the external communication state. Therefore, in this case, in addition to the pressure of the circulation pump 7, the liquid medicine (W in FIG. 7B) in the circulation path 5 is branched using the negative pressure generated in the medicine mixing portion 24 a of the washing water flow path 3. 6 can be reliably supplied to the washing water flow path 3.

  Further, in the washing water discharge mode in which the circulation pump 7 is stopped, the opening / closing valve 19 is not subjected to the pressure of the circulation pump 7, and the opening / closing valve 19 has a slit-like hole as shown in FIG. It is set so as to return elastically so as to close 19c, whereby the communication state of the branch path 6 and the cleaning water flow path 3 is blocked in the cleaning water discharge mode. Further, at this time, a gap 43 is formed between the tip of the valve portion 19b that has returned to elasticity and the inner peripheral surface of the communication hole 41, an air release path is formed, and the medicine mixing portion 24a of the washing water flow path 3 is exposed to the atmosphere. By communicating with the outside through the open path, the negative pressure in the medicine mixing portion 24a is reduced. Therefore, in this case, the open / close valve 19 is prevented from being elastically deformed by the negative pressure generated in the medicine mixing portion 24a of the washing water flow path 3 to open the slit-shaped hole 19c. As a result, the liquid medicine is used in the washing water discharge mode. Is prevented from leaking into the washing water channel 3. Moreover, the structure of the on-off valve 19 can be simplified compared with the case where an electromagnetic valve is used, and cost reduction can be achieved.

  The washing water discharge device 1 according to the present invention is not limited to the turn trap type flush toilet, but can be similarly applied to a siphon jet flush toilet, a flushing flush toilet, and the like. Furthermore, the present invention can be widely applied to a dishwasher that performs foam cleaning in addition to a flush toilet.

It is sectional drawing of the flush toilet provided with the washing water discharge apparatus of one Embodiment of this invention. It is a perspective view of a washing water discharge device same as the above. (A)-(c) is the top view, front view, and side view of a washing water discharge apparatus same as the above. It is front sectional drawing explaining the washing water flow path same as the above. It is a plane sectional view explaining a washing water channel same as the above. FIG. 6 is a cross-sectional view taken along line AA in FIG. 5. It is a modification of an on-off valve same as the above, (a) shows the state which the on-off valve closed, (b) is sectional drawing explaining the state on which the on-off valve opened. It is a block diagram regarding a control part same as the above. It is a time chart explaining the washing water discharge mode and chemical | medical agent mixing washing water discharge mode same as the above. It is a figure explaining opening and closing of a turn trap same as the above. It is sectional drawing explaining the state which connected the medicine tank same as the above, and the circulation path so that removal was possible.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wash water discharge apparatus 2 Discharge port 3 Wash water flow path 5 Circulation path 6 Branch path 7 Circulation pump 8 Drug tank 10 Toilet body 11 Bowl part 24 Small diameter part

Claims (5)

A cleaning water discharge device that discharges from a discharge port a mixed drug cleaning water in which a liquid drug is mixed in cleaning water flowing through a cleaning water flow path, a drug tank that stores liquid drug, and a circulation path that is connected to the drug tank at both ends. A circulation pump that circulates the liquid medicine in the circulation path into the circulation path, and a branch path that branches from the circulation path and communicates with the wash water flow path, and that circulates in the circulation path. menstrual provided drug supply means for supplying the washing water channel Rutotomoni, the cleaning water passage, and a nozzle tube formed in a tapered shape gradually reduced flow path cross-sectional area toward the distal end, the nozzle tubes A horizontal tubular ejector tube into which the tip is inserted is provided in this order from upstream to downstream, and the ejector tube has an upstream in which the cross-sectional area of the flow path is large upstream and the cross-sectional area of the flow path gradually decreases toward the downstream. A diameter portion, a small diameter portion with a narrowed path diameter, and a downstream large diameter portion that gradually increases the cross-sectional area of the channel as it goes downstream of the small diameter portion are formed in this order from upstream to downstream. A cleaning water discharge device , wherein an air mixing part is provided in the flow path part of the part, and a chemical mixing part into which the liquid chemical is mixed from the branch path is provided in the flow path part of the small diameter part .   The circulation pump also serves as a medicine supply means, and includes a pump control means for adjusting the output of the circulation pump and controlling the supply amount of the liquid medicine sent to the washing water flow path. The cleaning water discharge device according to claim 1.   The medicine tank can be removed from the circulation path, and after the removed medicine tank is reinstalled, the circulation pump is automatically driven to fill and fill the circulation path with the liquid medicine. The cleaning water discharge device according to claim 1, further comprising an initial setting mode in which the medicine mixed cleaning water is discharged and held in a standby state.   The flow path cross-sectional area of the washing water flow path portion into which the liquid medicine is mixed from the branch path is a small-diameter portion that is narrower than the flow path cross-sectional area of other flow path portions. The cleaning water discharge apparatus as described in any one of Claims.   The cleaning water discharge device according to any one of claims 1 to 4 is installed outside the bowl portion in the toilet body, and the discharge port of the cleaning water discharge device is disposed facing the inner surface of the bowl portion. A flush toilet characterized by.

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